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最新完整托福模拟题阅读

最新完整托福模拟题阅读(一)之樊仲川亿创作Questions 12-20 The elements other than hydrogen and helium exist In such small quantities that it is accurate to say that the universe somewhat more than 25 percent helium by weight and somewhat less than 25 percent hydrogen. Astronomers hQuestions 12-20The elements other than hydrogen and helium exist In such small quantities that it is accurate to say that the universe somewhat more than 25 percent helium by weight and somewhat less than 25 percent hydrogen.Astronomers have measured the abundance of helium throughout our galaxy and in other galaxies as well. Helium has been found In old stars, in relatively young ones, in interstellar gas, and in the distant objects known as quasars. Helium nuclei have also been found to be constituents of cosmic rays that fall on the earth (cosmic "rays" are not really a form of radiation; they consist of rapidly moving particles of numerous differentkinds). It doesn't seem to make very much difference where the helium is found. Its relative abundance never seems to vary much. In some places, there may be slightly more of it; In others, slightly less, but the ratio of helium to hydrogen nuclei always remains about the same.Helium is created in stars. In fact, nuclear reactions that convert hydrogen to helium are responsible for most of the energy that stars produce. However, the amount of helium that could have been produced in this manner can be calculated, and it turns out to be no more than a few percent. The universe has not existed long enough for this figure to he significantly greater. Consequently, if the universe is somewhat more than 25 percent helium now, then it must have been about 25 percent helium at a time near the beginning..However, when the universe was less than one minute old, no helium could have existed. Calculations indicate that before this time temperatures were too high and particles of matter were moving around much too rapidly. It was only after the one-minute point that helium could exist. By this time, the universe had cooled sufficiently that neutrons and protons could stick together. But the nuclear reactions that led to the formation of helium went on for only a relatively short time. By the time the universe was a few minutes old, helium production had effectively ceased.12. what does the passage mainly explain?(A)How stars produce energy(B)The difference between helium and hydrogen(C)When most of the helium in the universe was formed(D)Why hydrogen is abundant13. According to the passage, helium is(A) the second-most abundant element in the universe(B) difficult to detect(C) the oldest element in the universe(D) the most prevalent element in quasars14. The word "constituents" in line 7 is closest in meaning to(A) relatives (B) causes (C)components (D) targets15. Why does the author mention "cosmic rays't' in line 7?(A)As part of a list of things containing helium(B) As an example of an unsolved astronomical puzzle(C) To explain how the universe began(D) To explain the abundance of hydrogen in the universe16. The word "vary" in line 10 is closest ill meaning to(A) mean (B) stretch (C) change (D) include17. The creation of helium within stars(A) cannot be measured (B) produces energy(C) produces hydrogen as a by-product(D) causes helium to be much more abundant In old stars than In young star:18. The word "calculated" in line 15 is closest in meaning to(A) ignored (B) converted (C) increased (D) determined19. Most of the helium in the universe was formed(A) in interstellar space (B) in a very short time(C) during the first minute of the universe's existence(D) before most of the hydrogen20. The word "ceased" in line 26 is closest in meaning to(A)extended (B)performed (C)taken hold(D)stoppedHormones in the BodyUp to the beginning of the twentieth century, the nervous system was thought to control all communication within the body and the resulting integration of behavior. Scientists had determined that nerves ran, essentially,on electrical impulses. These impulses were thought to be the engine for thought, emotion, movement, and internal processes such as digestion. However, experiments by William Bayliss and Ernest Starling on the chemical secretin, which is produced in the small intestine when food enters the stomach, eventually challenged that view. From the small intestine, secretin travels through the bloodstream to the pancreas. There, it stimulates the release of digestive chemicals. In this fashion, the intestinal cells that produce secretin ultimately regulate the production of different chemicals in a different organ, the pancreas.Such a coordination of processes had been thought to require control by the nervous system; Bayliss and Starling showed that it could occur through chemicals alone. This discovery spurred Starling to coin the term hormone to refer to secretin, taking it from the Greek word hormon, meaning “to excite” or “to set in motion.” A hormone is a chemical pro duced by one tissue to make things happen elsewhere.As more hormones were discovered, they were categorized, primarily according to the process by which they operated on the body. Some glands (which make up the endocrine system) secrete hormones directly into the bloodstream. Such glands include the thyroid and the pituitary. The exocrine system consists of organs and glands that produce substances that are used outside the bloodstream, primarily for digestion. The pancreas is one such organ, although it secretes some chemicals into the blood and thus is also part of the endocrine system.Much has been learned about hormones since their discovery. Some play such key roles in regulating bodily processes or behavior that their absence would cause immediate death. The most abundant hormones have effects that are less obviously urgent but can be more far-reaching and difficult to track: They modify moods and affect human behavior, even some behavior we normally think of as voluntary. Hormonal systems are very intricate. Even minute amounts of the right chemicals can suppress appetite, calm aggression, and change the attitude of a parent toward a child. Certain hormones accelerate the development of the body, regulating growthand form; others may even define an individual’s personality characteristics. The quantities and proportions of hormones produced change with age, so scientists have given a great deal of study to shifts in the endocrine system over time in the hopes ofalleviating ailments associated with aging.In fact, some hormone therapies are already very common. A combination of estrogen and progesterone has been prescribed for decades to women who want to reduce mood swings, sudden changes in body temperature, and other discomforts caused by lower natural levels of those hormones as they enter middle age. Known as hormone WordStrment therapy (HRT), the treatment was also believed to prevent weakening of the bones. At least one study has linked HRT with a heightened risk of heart disease and certain types of cancer. HRT may also increase the likelihood that blood clots—dangerous because they could travel through the bloodstream and block major blood vessels—will form. Some proponents of HRT have tempered their enthusiasm in the face of this new evidence, recommending it only to patients whosesymptoms interfere with their abilities to live normal lives.Human growth hormone may also be given to patients who are secreting abnormally low amounts on their own. Because of the complicated effects growth hormone has on the body, such treatments are generally restricted to children who would be pathologically small in stature without it. Growth hormone affects not just physical size but also the digestion of food and the aging process. Researchers and family physicians tend to agree that it is foolhardy to dispense it in cases in which the risks are not clearly outweighed by the benefits.27. The word engine in the passage is closest in meaning to(A) desire (B) origin (C) science (D) chemical28. The word it in the passage refers to(A) secretin (B) small intestine (C) bloodstream (D) pancreas29. The word spurred in the passage is closest in meaning to(A) remembered (B) surprised (C) invented (D) motivated30. To be considered a hormone, a chemical producedin the body must(A) be part of the digestive process(B) influence the operations of the nervous system(C) affect processes in a different part of the body(D) regulate attitudes and behavior31. The glands and organs mentioned in paragraph 3are categorized according to(A) whether scientists understand their function(B) how frequently they release hormones into thebody(C) whether the hormones they secrete influence the aging process(D) whether they secrete chemicals into the bloodParagraph 3 is marked with an arrow [→]32. The word key in the passage is closest in meaning to(A) misunderstood (B) precise (C) significant(D) simple33. The word minute in the passage is closest in meaning to(A) sudden (B) small (C) changing (D) noticeable34. Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect answer choices change the meaning in important ways or leave out essential information.(A) Most moods and actions are not voluntary because they are actually produced by the production of hormones in the body.(B) Because the effects of hormones are difficult to measure, scientists remain unsure how far-reaching their effects on moods and actions are.(C) When the body is not producing enough hormones, urgent treatment may be necessary to avoid psychological damage.(D) The influence of many hormones is not easy to measure, but they can affect both people’s psychology and actions extensively.35. The word tempered in the passage is closest in meaning to(A) decreased (B) advertised (C) prescribed(D) researched36. Which patients are usually treated with growth hormone?(A) Adults of smaller statue than normal(B) Adults with strong digestive systems(C) Children who are not at risk from the treatment(D) Children who may remain abnormally small37.Which of the following sentences explains the primary goal of hormone WordStrment therapy?These sentences are highlighted in the passage.(A) The quantities and proportions of hormones produced change with age, so scientists have given a great deal of study to shifts in the endocrine system over time in the hopes of alleviating ailments associated with aging.(B) A combination of estrogen and progesterone has been prescribed for decades to women who want to reduce mood swings, sudden changes in body temperature, and other discomforts caused by lower natural levels of those hormones as they enter middle age.(C) HRT may also increase the likelihood that blood clots—dangerous because they could travel through the bloodstream and block major blood vessels—will form.(D) Because of the complicated effects growth hormone has on the body, such treatments are generally restrictedto children who would be pathologically small in stature without it.38. Look at the four squares that indicate where the following sentence could be added to the passage.The body is a complex machine, however, and recent studies have called into question the wisdom of essentially trying to fool its systems into believing they aren’t aging.Where would the sentence best fit?Click on a square to add the sentence to the passage.39. Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.The class of chemicals called hormones was discovered by two researchers studying a substance produced in the small intestine.Answer ChoicesThe term hormone is based on a Greek word that means "to excite" or "to set in motion."Researchers are looking for ways to decrease the dangers of treatments with growth hormone so that more patients can benefit from it.Hormones can be given artificially, but such treatments have risks and must be used carefully.Hormones can affect not only life processes such as growth but also behavior and emotion.Scientists have discovered that not only the nervous system but also certain chemicals can affect bodily processes far from their points of origin.Hormone WordStrment therapy (HRT) may increase the risk of blood clots and heart disease in middle-age women.Answer KeysReading:27. B 28. A 29. D 30. C 31. D 32. C 33. B 34. D35. A 36. D 37. A 38. third square39.1) Scientists have discovered that not only the nervous system….2) Hormones can affect not only life processes…..3) Researchers are looking for ways to decrease the dangers of ….。

托福考试阅读模拟试题

托福考试阅读模拟试题

托福考试阅读模拟试题2017年托福考试阅读模拟试题做一个有实力的'人,不要让今天的懒惰成为明天的痛。

下面是店铺为大家搜索整理的托福阅读模拟试题,希望大家能有所收获,Questions 32-40Considered the most influential architect of his time, Frank Lloyd Wright (1867-1959) was born in the small rural community of Richland Center, Wisconsin. He entered the University of Wisconsin at the age of 15 as a special student, studying engineering because the school had no course in architecture. At the age of 20 he then went to work as a draughtsman in Chicago in order to learn the traditional, classical language of architecture. After marrying into a wealthy business family at the age of 21, Wright set up house in an exclusive neighborhood in Chicago, and after a few years of working for a number of architectural firms, set up his own architectural office.For twenty years he brought up a family of six children upstairs, and ran a thriving architectural practice of twelve or so draughtsmen downstairs. Here, in an idyllic American suburb, with giant oaks, sprawling lawns, and no fences, Wright built some sixty rambling homes by the year 1900. He became the leader of a style known as the "Prairie" school - houses with low-pitched roofs and extended lines that blended into the landscape and typified his style of "organic architecture".By the age of forty-one, in 1908, Wright had achieved extraordinary social and professional success. He gave countless lectures at major universities, and started his Taliesin Fellowship - a visionary social workshop in itself. In 1938 he appeared on the cover of Time magazine, and later, on a two cent stamp. The mostspectacular buildings of his mature period were based on forms borrowed from nature, and the intentions were clearly romantic, poetic, and intensely personal. Examples of these buildings are Tokyo's Imperial Hotel (1915-22: demolished 1968), and New York City's Guggenheim Museum (completed 1959). He continued working until his death in 1959, at the age of 92, although in his later years, he spent as much time giving interviews and being a celebrity, as he did in designing buildings. Wright can be considered an essentially idiosyncratic architect whose influence was immense but whose pupils were few.32. With which of the following subjects is the passage mainly concerned?(a) the development of modern architecture in America(b) the contributions of the "Prairie" School to modern architecture(c) the life and achievements of a famous architect(d) the influence of the style of "organic architecture" in America33. Frank Lloyd Wright first worked as a draughtsman because(a) for twenty years he lived above his shop and employed draughtsmen(b) to learn the language of architecture(c) that is what he studied at the University of Wisconsin(d) that is the work of new employees in architectural firms34. The word "some" in line 11 is closest in meaning to(a) around(b) over(c) nearly(d) exactly35. According to the passage, an idyllic American suburb is(a) based on forms borrowed from nature(b) blended into the landscape(c) giant oaks, sprawling lawns, and no fences(d) houses with low-pitched reefs and extended lines36. The word "blended" in line 13 is closest in meaning to(a) dug(b) cut(c) imposed(d) merged37. The word "itself" in line 17 refers to(a) social workshop(b) Taliesin Fellowship(c) He(d) Major universities38. The word "idiosyncratic" in line 24 is closest in meaning to(a) idiotic(b) idealistic(c) individualistic(d) independent39. Which of the following can be inferred from the passage?(a) the Taliesin Fellowship was a grant of money(b) many of Wright's architectural ideas have not been taken up by others(c) Wright used his wife's money to set up his own architectural office in an exclusive neighborhood in Chicago(d) Some of Wright's most notable buildings have been demolished because they were not popular40. All of the following about Frank Lloyd Wright are trueEXCEPT(a) he became the leader of a style known as "organic architecture"。

托福考试阅读模拟试题及答案

托福考试阅读模拟试题及答案

托福考试阅读模拟试题及答案PARAGRAPH 1 The earliest of the city states of the ancient Near East appeared at the southern end of the Mesopotamian plain, the area between the Tigris and Euphrates rivers in what is now Iraq. It was here that the civilization known as Sumer emerged in its earliest form in the fifth millennium. At first sight, the plain did not appear to be a likely home for a civilization. There were few natural resources, no timber, stone, or metals.Rainfall was limited, and what water there was rushed across the plain in the annual flood of melted snow. As the plain fell only 20 meters in 500 kilometers, the beds of the rivers shifted constantly. It was this that made the organization of irrigation, particularly the building of canals to channel and preserve the water, essential. Once this was done and the silt carried down by the rivers was planted, the rewards were rich: four to five times whatrain-fed earth would produce. It was these conditions that allowed an elite to emerge, probably as an organizing class, and to sustain itself through the control of surplus crops. PARAGRAPH 2 It is difficult to isolate the factors that led to the next development—the emergence ofurban settlements. The earliest, that of Eridu, about 4500 B.C.E., and Uruk, a thousand years later, center on impressive temple complexes built of mud brick. In some way, the elite had associated themselves with the power of the gods. Uruk, for instance, had two patron gods—Anu, the god of the sky and sovereign of all other gods, and inanna, a goddess of love and war—and there were others, patrons of different cities. Human beings were at their mercy. The biblical story of the Flood may originate in Sumer. In the earliest version, the gods destroy the human race because its clamor had been so disturbing to them. PARAGRAPH 3 It used to be believed that before 3000 B.C.E. thepolitical and economic life of the cities was centered on their temples, but it now seems probable that the cities had secular rulers from earliest times. Within the city lived administrators, craftspeople, and merchants. (Trading was important, as so many raw materials, the semiprecious stones for the decoration of the temples, timbers for roofs, and all metals, had to be imported.) An increasingly sophisticated system of administration led in about 3300 B.C.E. to the appearance of writing. The earliest script was based on logograms, with a symbol being used to expressa whole word. The logograms were incised on damp clay tablets with a stylus with a wedge shape at its end. (The Romans called the shape cuneus and this gives the scriptits name of cuneiform.) Two thousand logograms have been recorded from these early centuries of writing. A more economical approach was to use a sign to express not a whole word but a single syllable. (To take an example: the Sumerian word for" head" was "sag." Whenever a word including a syllable in which the sound "sag" was to be written, the sign for "sag" could be used to express that syllable with the remaining syllables of the word expressed by other signs.) By 2300 B.C.E. the number of signs required had been reduced to 600, and the range of words that could be expressed had widened. Texts dealing with economic matters predominated, as they always had done; but at this point works of theology, g literature, history, and law also appeared. PARAGRAPH 4 Other innovations of the late fourth millennium include the wheel, probably developed first as a more efficient way of making pottery and then transferred to transport. A tablet engraved about 3000 B.C.E. provides the earliest known example from Sumer, a roofed boxlike sledge mounted on four solid wheels. Amajor development was the discovery, again about 3000B.C.E., that if copper, which had been known in Mesopotamia since about 3500 B.C.E., was mixed with tin, a much harder metal, bronze, would result. Although copper and stonetools continued to be used, bronze was far more successful in creating sharp edges that could be used as anything from saws and scythes to weapons. The period from 3000 to 1000 B.C.E., when the use of bronze became I widespread, is normally referred to as the Bronze Age. PARAGRAPH 1 The earliest of the city states of the ancient Near East appeared at the southern end of the Mesopotamian plain, the area between the Tigris and Euphrates rivers in what is now Iraq. It was here that the civilization known as Sumer emerged in its earliest form in the fifth millennium. At first sight, the plain did not appear to be a likely home for a civilization. There were few natural resources, no timber, stone, or metals. Rainfall was limited, and what water there was rushed across the plain in the annual flood of melted snow. As the plain fell only 20 meters in 500 kilometers, the beds of the rivers shifted constantly. It was this that made the organization of irrigation, particularly the building of canals to channel and preservethe water, essential. Once this was done and the silt carried down by the rivers was planted, the rewards were rich: four to five times what rain-fed earth would produce. It was these conditions that allowed an elite to emerge, probably as an organizing class, and to sustain itself through the control of surplus crops. PARAGRAPH 1The earliest of the city states of the ancient Near East appeared at the southern end of the Mesopotamian plain, the area between the Tigris and Euphrates rivers in what is now Iraq. It was here that the civilization known as Sumer emerged in its earliest form in the fifth millennium. At first sight, the plain did not appear to be a likely home for a civilization. There were few natural resources, no timber, stone, or metals. Rainfall was limited, and what water there was rushed across the plain in the annual flood of melted snow. As the plain fell only 20 meters in 500 kilometers, the beds of the rivers shifted constantly. It was this that made the organization of irrigation, particularly the building of canals to channel and preserve the water, essential. Once this was done and the silt carried down by the rivers was planted, the rewards were rich: four to five times what rain-fed earth would produce.It was these conditions that allowed an elite to emerge, probably as an organizing class, and to sustain itself through the control of surplus crops. 1、Which of the following is NOT mentioned in paragraph 1 as a disadvantage of the Mesopotamian plain? There was not very much rainfall for most of the year. Melting snow caused flooding every year. The silt deposited by rivers damaged crops. Timber, stone and metals were notreadily available. 2、According to paragraph 1, which of the following made it possible for an elite to emerge? New crops were developed that were better suited to conditions on the Mesopotamian plain. The richest individuals managed to gain control of the most valuable cropland. Control over the few available natural resources made some people four to five times richer than everyone else. The building of canals to increase agricultural output required organization. 3、The word "sustain" in the passage is closest in meaning todefend promote maintain transform PARAGRAPH 2 It is difficult to isolate the factors that led to the next development—the emergence of urban settlements. The earliest, that of Eridu, about 4500B.C.E., and Uruk, a thousand years later, center on impressive temple complexes built of mud brick. In some way, the elite had associated themselves with the power of the gods. Uruk, for instance, had two patron gods—Anu, the god of the sky and sovereign of all other gods, and inanna, a goddess of love and war—and there were others, patrons of different cities. Human beings were at their mercy. The biblical story of the Flood may originate in Sumer. In the earliest version, the gods destroy the human race because its clamor had been so disturbing to them. 4、According to paragraph 2, Eridu and Uruk are examples of urban settlements that lacked the features usually found in other early urban settlements f developed around religious buildings grew much more rapidly than most of the urban settlements found in Sumer were mysteriously destroyed and abandoned 5、The word "sovereign" in the passage is closest in meaning to counselor master defender creator PARAGRAPH 3 It used to be believed that before 3000 B.C.E. the political and economic life of the cities was centered on their temples, but it now seems probable that the cities had secular rulers from earliest times. Within the city lived administrators,craftspeople, and merchants. (Trading was important, as so many raw materials, the semiprecious stones for the decoration of the temples, timbers for roofs, and all metals, had to be imported.) An increasingly sophisticated system of administration led in about 3300 B.C.E. to the appearance of writing. The earliest script was based on logograms, with a symbol being used to express a whole word. The logograms were incised on damp clay tablets with a stylus with a wedge shape at its end. (The Romans called the shape cuneus and this gives the script its name of cuneiform.) Two thousand logograms have been recorded from these early centuries of writing. A more economical approach was to use a sign to express not a whole word but a single syllable. (To take an example: the Sumerian word for" head" was "sag." Whenever a word including a syllable in which the sound "sag" was to be written, the sign for "sag" could be used to express that syllable with the remaining syllables of the word expressed by other signs.) By 2300 B.C.E. the number of signs required had been reduced to 600, and the range of words that could be expressed had widened. Texts dealing with economic matters predominated, as they always had done; but at this pointworks of theology, g literature, history, and law also appeared. 6、According to paragraph 3, which of the following led to the appearance of writing? An increasingly sophisticated administrative system Coordination between secular and religious leaders The large volume of trade, particularly imports A rapidly expanding and changing population Paragraph 3 is marked with7、 In paragraph 3, why does the author provide the information that the number of signs in use had dropped from 2,000 to 600 by 2300 B.C.E.? To argue that the development of writing involved periods of growth followed by periods of decline To demonstrate that earlier written texts used a larger vocabulary than later texts, which were aimed at a broader audience | To support the claim that the range of words expressed by logograms varied widely depending on time period and type of text To provide evidence for the increased efficiency of using signs to express syllables rather than whole words 8、According to paragraph 3, ancient texts most commonly dealt with theology literature economics law PARAGRAPH 4 Other innovations of the late fourthmillennium include the wheel, probably developed first as a more efficient way of making pottery and then transferred to transport. A tablet engraved about 3000 B.C.E. provides the earliest known example from Sumer, a roofed boxlike sledge mounted on four solid wheels. A major development was the discovery, again about 3000 B.C.E., that if copper, which had been known in Mesopotamia since about 3500B.C.E., was mixed with tin, a much harder metal, bronze, would result. Although copper and stone tools continued to be used, bronze was far more successful in creating sharp edges that could be used as anything from saws and scythes to weapons. The period from 3000 to 1000 B.C.E., when the use of bronze became I widespread, is normally referred to as the Bronze Age. 9、According to paragraph 4, the earliest wheels probably were first developed in areas outside Mesopotamia were used to make pottery appeared on boxlike sledges were used to transport goods between cities 10、The word "engraved* in the passage is closest in meaning to carved produced dated discovered 11、 Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change themeaning in important ways or leave out essential information. Also around 3000 B.C.E., it was discovered that mixing copper, known from about 3500 B.C.E., with tin would create a much harder metal known as bronze.Although copper had been known since 3500 B.C.E in Mesopotamia, the discovery of bronze did not occur until around 3000 B.C.E. Another major development around 3000 B.C.E. was the discovery that copper could be mixed with a much harder metal known as tin. The development of bronze by mixing copper and tin probably occurred around 3000 B.C.E. but may have happened as early as 3500 B.C.E. 12、The word "widespread" in the passage is closest in meaning to obvious significant necessary common 13、Look at the four squares [ ■ ]that indicate where the following sentence could be added to the passage. City life was diverse, and the population was engaged in a variety of occupations. PARAGRAPH 3 It used to be believed that before 3000 B.C.E. the political and economic life of the cities was centered on their temples, but it now seems probable that the cities had secular rulers from earliest times. ■ Within the city lived administrators, craftspeople, and merchants. (Trading was important, as somany raw materials, the semiprecious stones for the decoration of the temples, timbers for roofs, and all metals, had to be imported.) ■ An increasingly sophisticated system of administration led in about 3300 B.C.E. to the appearance of writing. ■ The earliest script was based on logograms, with a symbol being used to express a whole word. ■ The logograms were incised on damp clay tablets with a stylus with a wedge shape at its end. (The Romans called the shape cuneus and this gives the scriptits name of cuneiform.) Two thousand logograms have been recorded from these early centuries of writing. A more economical approach was to use a sign to express not a whole word but a single syllable. (To take an example: the Sumerian word for" head" was "sag." Whenever a word including a syllable in which the sound "sag" was to be written, the sign for "sag" could be used to express that syllable with the remaining syllables of the word expressed by other signs.) By 2300 B.C.E. the number of signs required had been reduced to 600, and the range of words that could be expressed had widened. Texts dealing with economic matters predominated, as they always had done; but at this point works of theology, g literature, history, andlaw also appeared. 14、Direction: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points. Irrigation made it possible for the civilization known as sumer to arise on the Mesopotamian plain in the fifth millennium B.C.E. Answer Choices A. The scarcity of natural resources on the plain made it necessary for a powerful elite to emerge and take charge of trade and imports. B. The economy of each city was based on a craft such as pottery or metal working, and the city of Eridu was known for its saws, scythes and weapons.C. Writing appeared in the form of logograms and later developed into a system using signs to represent syllables rather than whole words.D. Priests were powerful figures in the ancient civilization and controlled the political and economic life of the cities.E. The earliest city states had one or more patron gods and were built around central temple complexeF. The developmentof the wheel and the creation of bronze were important innovations in Sumer。

小托福阅读:小托福阅读模拟题及备考技巧分享

小托福阅读:小托福阅读模拟题及备考技巧分享

小托福阅读:小托福阅读模拟题及备考技巧分享阅读题在小托福考试中是很重要的一项,考生想要在阅读中取得高分的话,一定要掌握一些技巧,多做一些练习题,下文分享的就是小托福阅读模拟题和备考技巧,一起阅读下吧!小托福阅读模拟题:Sample 1Passage:AnnouncementOn Saturday, december 12th, from 10A.M.until 4 P.M.,Carverton Middle School will be holding a music festival inthe school gymnasium. The special event will feature a variety of professionalmusicians and singers.We are looking for Carverton student to help with the jobs. Interested studentsshould speak with Ms. Braxton, the music teacher. Students who would like tohelp at the festival must have written permission from a parent of guardian.Why did the author write the announcement?(A) There will be a music festival to be held on Saturday.(B) The school is looking forward for some volunteers to help with the jobs atthe music festival.(C) The music teacher wants written permission from students’ parents.(D) There will be a variety of professional musicians and singers attending themusic festival.答案:BSample 2Passage Excerpt:“...How can so few basic tastes give to the enormous number of flavors weexperiment? This is possible because the basic tastes combine in differentproprotions. Compare this to colors. There are only three basiccolors------yellow, red, and blue-----but when mixed in different ways andproportions, these three basic colors are suffecient to create the vast arrayof colors that we see every day....”Why does the author mention colors?(A) to suggest that tasty foods are often colorful(B) to help explain how so many tastes are created(C) to dicuss how colors are used to decorate foods(D) to argue that people often associate colors with tastes答案:BSample 3Passage Excerpt:“...In fact, what we perceive as taste often involves smell more than the tasteexperienced through the tongue. This is why foods with strong tastes often seembland to people who, due to a stuffy nose, cannot smell them. For example,cinnamon tastes quite mild to people who cannot enjoy its fragrant smell. Thesame is true of drinks, like hot coffee or tea, which taste best when they canbe smelled as well as tasted...?What does the author imply about cinnamon?(A) It can relieve a stuffy nose(B) It can have a very strong taste(C) It should be kept in a cool place(D) It tastes better in large qunantities答案:A小托福阅读备考技巧:第1,增加词汇量提高阅读速度在小托福的备考中,词汇量学习是最为基础的,因此,考生一定要注意扩展自己的词汇量。

最新完整托福模拟题阅读

最新完整托福模拟题阅读

最新完整托福模拟题阅读(一)Questions 12-20 The elements other than hydrogen and helium exist In such small quantities that it is accurate to say that the universe somewhat more than 25 percent helium by weight and somewhat less than 25 percent hydrogen. Astronomers h Questions 12-20The elements other than hydrogen and helium exist In such small quantities that it is accurate to say that the universe somewhat more than 25 percent helium by weight and somewhat less than 25 percent hydrogen.Astronomers have measured the abundance of helium throughout our galaxy and in other galaxies as well. Helium has been found In old stars, in relatively young ones, in interstellar gas, and in the distant objects known as quasars. Helium nuclei have also been found to be constituents of cosmic rays that fall on the earth (cosmic "rays" are not really a form of radiation; they consist of rapidly moving particles of numerous different kinds). It doesn't seem to make very much difference where the helium is found. Its relative abundance never seems to vary much. In some places, there may be slightly more of it; In others, slightly less, but the ratio of helium to hydrogen nuclei always remains about the same.Helium is created in stars. In fact, nuclear reactions that convert hydrogen to helium are responsible for most of the energy that stars produce. However, the amount of helium that could have been produced in this manner can be calculated, and it turns out to be no more than a few percent. The universe has not existed long enough for this figure to he significantly greater. Consequently, if the universe is somewhat more than 25 percent helium now, then it must have been about 25 percent helium at a time near the beginning..However, when the universe was less than one minute old, no helium could have existed. Calculations indicate that before this time temperatures were too high and particles of matter were moving around much too rapidly. It was only after the one-minute point that helium could exist. By this time, the universe had cooled sufficiently that neutrons and protons could stick together.But the nuclear reactions that led to the formation of helium went on for only a relatively short time. By the time the universe was a few minutes old, helium production had effectively ceased.112.what does the passage mainly explain?(A)How stars produce energy(B)The difference between helium and hydrogen(C)When most of the helium in the universe wasformed (D)Why hydrogen is abundant13.According to the passage, helium is(A)the second-most abundant element in the universe(B)difficult to detect(C)the oldest element in the universe(D)the most prevalent element in quasars14. The word "constituents" in line 7 is closest in meaning to(A) relatives(B) causes(C)components(D) targets15.Why does the author mention "cosmic rays't' in line 7?(A)As part of a list of things containing helium(B) As an example of an unsolved astronomical puzzle(C) To explain how the universe began(D) To explain the abundance of hydrogen in the universe16.The word "vary" in line 10 is closest ill meaning to(A) mean(B) stretch(C) change(D) include17. The creation of helium within stars(A) cannot be measured(B) produces energy2(C)produces hydrogen as a by-product(D)causes helium to be much more abundant In old stars than In young star:18. The word "calculated" in line 15 is closest in meaning to(A) ignored(B) converted(C) increased(D) determined19. Most of the helium in the universe was formed(A) in interstellar space(B) in a very short time(C)during the first minute of the universe's existence(D)before most of the hydrogen20. The word "ceased" in line 26 is closest in meaning to(A)extended(B)performed(C)taken hold(D)stoppedHormones in the BodyUp to the beginning of the twentieth century, the nervous system was thought to control all communication within the body and the resulting integration of behavior. Scientists had determined that nerves ran, essentially, on electrical impulses. These impulses were thought to be the engine for thought, emotion, movement, and internal processes such as digestion. However, experiments by William Bayliss and Ernest Starling on the chemical secretin, which is produced in the small intestine when food enters the stomach, eventually challenged that view. From the small intestine, secretin travels through the bloodstream to the pancreas. There, it stimulates the release of digestive chemicals. In this fashion, the intestinal cells that produce secretin ultimately regulate the production of different chemicals in a different organ, the pancreas.Such a coordination of processes had been thought to require control by the nervous system; Bayliss and Starling showed that it could occur through chemicals alone. This discovery spurred Starling to coin the term hormone to refer to secretin,3taking it from the Greek word hormon, meaning“ to excite〞or“ to set in motion. hormone is a chemical produced by one tissue to make things happen elsewhere.As more hormones were discovered, they were categorized, primarily accordingto the process by which they operated on the body. Some glands (which make upthe endocrine system) secrete hormones directly into the bloodstream. Such glands include the thyroid and the pituitary. The exocrine system consists of organs andglands that produce substances that are used outside the bloodstream, primarily for digestion. The pancreas is one such organ, although it secretes some chemicals intothe blood and thus is also part of the endocrine system.Much has been learned about hormones since their discovery. Some play such key roles in regulating bodily processes or behavior that their absence would causeimmediate death. The most abundant hormones have effects that are less obviouslyurgent but can be more far-reaching and difficult to track: They modify moods and affect human behavior, even some behavior we normally think of as voluntary. Hormonal systems are very intricate. Even minute amounts of the right chemicals can suppress appetite, calm aggression, and change the attitude of a parent toward a child. Certain hormones accelerate the development of the body, regulating growth and form;others may even define an individual ’ s personality characteristics. The quantities and proportions of hormones produced change with age, so scientists have given a greatdeal of study to shifts in the endocrine system over time in the hopes ofalleviating ailments associated with aging.In fact, some hormone therapies are already very common. A combination of estrogen and progesterone has been prescribed for decades to women who want to reduce mood swings, sudden changes in body temperature, and other discomforts caused by lower natural levels of those hormones as they enter middle age. Knownas hormone replacement therapy (HRT), the treatment was also believed to prevent weakening of the bones. At least one study has linked HRT with a heightened risk of heart disease and certain types of cancer. HRT may also increase the likelihood that blood clots—dangerous because they could travel through the bloodstream and block major blood vessels—will form. Some proponents of HRT have tempered their enthusiasm in the face of this new evidence, recommending it only to patients whose symptoms interfere with their abilities to live normal lives.Human growth hormone may also be given to patients who are secretingabnormally low amounts on their own. Because of the complicated effects growth4hormone has on the body, such treatments are generally restricted to children who would be pathologically small in stature without it. Growth hormone affects not just physical size but also the digestion of food and the aging process. Researchers and family physicians tend to agree that it is foolhardy to dispense it in cases in whichthe risks are not clearly outweighed by the benefits.27. The word engine in the passage is closest in meaning to(A) desire(B) origin(C) science(D) chemical28. The word it in the passage refers to(A) secretin(B) small intestine(C) bloodstream(D) pancreas29. The word spurred in the passage is closest in meaning to(A) remembered(B) surprised(C) invented(D) motivated30.To be considered a hormone, a chemical produced in the body must(A) be part of the digestive process(B) influence the operations of the nervous system(C) affect processes in a different part of the body(D) regulate attitudes and behavior31.The glands and organs mentioned in paragraph 3 are categorized according to(A) whether scientists understand their function(B) how frequently they release hormones into the body(C) whether the hormones they secrete influence the aging process(D) whether they secrete chemicals into the bloodParagraph 3 is marked with an arrow [→]32. The word key in the passage is closest in meaning to5(A) misunderstood(B) precise(C) significant(D) simple33. The word minute in the passage is closest in meaning to(A) sudden(B) small(C) changing(D) noticeable34.Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect answer choices change the meaning in important ways or leave out essential information.(A)Most moods and actions are not voluntary because they areactually produced by the production of hormones in the body.(B)Because the effects of hormones are difficult to measure, scientistsremain unsure how far-reaching their effects on moods and actions are.(C)When the body is not producing enough hormones, urgent treatment maybe necessary to avoid psychological damage.(D)The influence of many hormones is not easy to measure, but they canaffect both people ’ s psychology and actions extensively.35. The word tempered in the passage is closest in meaning to(A) decreased(B) advertised(C) prescribed(D) researched36.Which patients are usually treated with growth hormone?(A) Adults of smaller statue than normal(B) Adults with strong digestive systems(C) Children who are not at risk from the treatment(D) Children who may remain abnormally small37.Which of the following sentences explains the primary goal ofhormone replacement therapy?These sentences are highlighted in the passage.6(A)The quantities and proportions of hormones produced change with age, so scientists have given a great deal of study to shifts in the endocrine system overtime in the hopes of alleviating ailments associated with aging.(B)A combination of estrogen and progesterone has been prescribed for decades to women who want to reduce mood swings, sudden changes in body temperature, and other discomforts caused by lower natural levels of those hormones as they enter middle age.(C)HRT may also increase the likelihood that blood clots— dangerous because they could travel through the bloodstream and block major blood vessels— will form.(D)Because of the complicated effects growth hormone has on the body,such treatments are generally restricted to children who would be pathologicallysmall in stature without it.38. Look at the four squares that indicate where the following sentence couldbe added to the passage.The body is a complex machine, however, and recent studies have called into question the wisdom of essentially trying to fool its systems into believing they aren ’ t aging.Where would the sentencefit?Clickbest on a squareto add the sentence to the passage.39.Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.The class of chemicals called hormones was discovered by tworesearchers studying a substance produced in the small intestine.Answer ChoicesThe term hormone is based on a Greek word that means "to excite" or "to set in motion."Researchers are looking for ways to decrease the dangers of treatments with growth hormone so that more patients can benefit from it.7Hormones can be given artificially, but such treatments have risks and must be used carefully.Hormones can affect not only life processes such as growth but also behavior and emotion.Scientists have discovered that not only the nervous system but also certain chemicals can affect bodily processes far from their points of origin.Hormone replacement therapy (HRT) may increase the risk of blood clots and heart diseasein middle-age women.Answer KeysReading:27. B28. A29. D30. C31. D32. C33. B34. D35. A36. D37. A38. third square39.1) Scientists have discovered that not only the nervous system⋯.2)Hormones can affect not only life processes⋯..3)Researchers are looking forways to decrease the dangers of⋯.8。

最新完整托福模拟题阅读

最新完整托福模拟题阅读

最新完整托福模拟题阅读(一)之蔡仲巾千创作Questions 12-20 The elements other than hydrogen and helium exist In such small quantities that it is accurate to say that the universe somewhat more than 25 percent helium by weight and somewhat less than 25 percent hydrogen. Astronomers hQuestions 12-20The elements other than hydrogen and helium exist In such small quantities that it is accurate to say that the universe somewhat more than 25 percent helium by weight and somewhat less than 25 percent hydrogen.Astronomers have measured the abundance of helium throughout our galaxy and in other galaxies as well. Helium has been found In old stars, in relatively young ones, in interstellar gas, and in the distant objects known as quasars. Helium nuclei have also been found to be constituents of cosmic rays that fall on the earth (cosmic "rays" are not really a form of radiation; they consist of rapidly moving particles of numerous differentkinds). It doesn't seem to make very much difference where the helium is found. Its relative abundance never seems to vary much. In some places, there may be slightly more of it; In others, slightly less, but the ratio of helium to hydrogen nuclei always remains about the same.Helium is created in stars. In fact, nuclear reactions that convert hydrogen to helium are responsible for most of the energy that stars produce. However, the amount of helium that could have been produced in this manner can be calculated, and it turns out to be no more than a few percent. The universe has not existed long enough for this figure to he significantly greater. Consequently, if the universe is somewhat more than 25 percent helium now, then it must have been about 25 percent helium at a time near the beginning..However, when the universe was less than one minute old, no helium could have existed. Calculations indicate that before this time temperatures were too high and particles of matter were moving around much too rapidly. It was only after the one-minute point that helium could exist. By this time, the universe had cooled sufficiently that neutrons and protons could stick together. But the nuclear reactions that led to the formation of helium went on for only a relatively short time. By the time the universe was a few minutes old, helium production had effectively ceased.12. what does the passage mainly explain?(A)How stars produce energy(B)The difference between helium and hydrogen(C)When most of the helium in the universe was formed(D)Why hydrogen is abundant13. According to the passage, helium is(A) the second-most abundant element in the universe(B) difficult to detect(C) the oldest element in the universe(D) the most prevalent element in quasars14. The word "constituents" in line 7 is closest in meaning to(A) relatives (B) causes (C)components (D) targets15. Why does the author mention "cosmic rays't' in line 7?(A)As part of a list of things containing helium(B) As an example of an unsolved astronomical puzzle(C) To explain how the universe began(D) To explain the abundance of hydrogen in the universe16. The word "vary" in line 10 is closest ill meaning to(A) mean (B) stretch (C) change (D) include17. The creation of helium within stars(A) cannot be measured (B) produces energy(C) produces hydrogen as a by-product(D) causes helium to be much more abundant In old stars than In young star:18. The word "calculated" in line 15 is closest in meaning to(A) ignored (B) converted (C) increased (D) determined19. Most of the helium in the universe was formed(A) in interstellar space (B) in a very short time(C) during the first minute of the universe's existence(D) before most of the hydrogen20. The word "ceased" in line 26 is closest in meaning to(A)extended (B)performed (C)taken hold(D)stoppedHormones in the BodyUp to the beginning of the twentieth century, the nervous system was thought to control all communication within the body and the resulting integration of behavior. Scientists had determined that nerves ran, essentially,on electrical impulses. These impulses were thought to be the engine for thought, emotion, movement, and internal processes such as digestion. However, experiments by William Bayliss and Ernest Starling on the chemical secretin, which is produced in the small intestine when food enters the stomach, eventually challenged that view. From the small intestine, secretin travels through the bloodstream to the pancreas. There, it stimulates the release of digestive chemicals. In this fashion, the intestinal cells that produce secretin ultimately regulate the production of different chemicals in a different organ, the pancreas.Such a coordination of processes had been thought to require control by the nervous system; Bayliss and Starling showed that it could occur through chemicals alone. This discovery spurred Starling to coin the term hormone to refer to secretin, taking it from the Greek word hormon, meaning “to excite” or “to set in motion.” A hormone is a chemical prod uced by one tissue to make things happen elsewhere.As more hormones were discovered, they were categorized, primarily according to the process by which they operated on the body. Some glands (which make up the endocrine system) secrete hormones directly into the bloodstream. Such glands include the thyroid and the pituitary. The exocrine system consists of organs and glands that produce substances that are used outside the bloodstream, primarily for digestion. The pancreas is one such organ, although it secretes some chemicals into the blood and thus is also part of the endocrine system.Much has been learned about hormones since their discovery. Some play such key roles in regulating bodily processes or behavior that their absence would cause immediate death. The most abundant hormones have effects that are less obviously urgent but can be more far-reaching and difficult to track: They modify moods and affect human behavior, even some behavior we normally think of as voluntary. Hormonal systems are very intricate. Even minute amounts of the right chemicals can suppress appetite, calm aggression, and change the attitude of a parent toward a child. Certain hormones accelerate the development of the body, regulating growthand form; others may even define a n individual’s personality characteristics. The quantities and proportions of hormones produced change with age, so scientists have given a great deal of study to shifts in the endocrine system over time in the hopes ofalleviating ailments associated with aging.In fact, some hormone therapies are already very common. A combination of estrogen and progesterone has been prescribed for decades to women who want to reduce mood swings, sudden changes in body temperature, and other discomforts caused by lower natural levels of those hormones as they enter middle age. Known as hormone WordStrment therapy (HRT), the treatment was also believed to prevent weakening of the bones. At least one study has linked HRT with a heightened risk of heart disease and certain types of cancer. HRT may also increase the likelihood that blood clots—dangerous because they could travel through the bloodstream and block major blood vessels—will form. Some proponents of HRT have tempered their enthusiasm in the face of this new evidence, recommending it only to patients whosesymptoms interfere with their abilities to live normal lives.Human growth hormone may also be given to patients who are secreting abnormally low amounts on their own. Because of the complicated effects growth hormone has on the body, such treatments are generally restricted to children who would be pathologically small in stature without it. Growth hormone affects not just physical size but also the digestion of food and the aging process. Researchers and family physicians tend to agree that it is foolhardy to dispense it in cases in which the risks are not clearly outweighed by the benefits.27. The word engine in the passage is closest in meaning to(A) desire (B) origin (C) science (D) chemical28. The word it in the passage refers to(A) secretin (B) small intestine (C) bloodstream (D) pancreas29. The word spurred in the passage is closest in meaning to(A) remembered (B) surprised (C) invented (D) motivated30. To be considered a hormone, a chemical producedin the body must(A) be part of the digestive process(B) influence the operations of the nervous system(C) affect processes in a different part of the body(D) regulate attitudes and behavior31. The glands and organs mentioned in paragraph 3are categorized according to(A) whether scientists understand their function(B) how frequently they release hormones into thebody(C) whether the hormones they secrete influence the aging process(D) whether they secrete chemicals into the bloodParagraph 3 is marked with an arrow [→]32. The word key in the passage is closest in meaning to(A) misunderstood (B) precise (C) significant(D) simple33. The word minute in the passage is closest in meaning to(A) sudden (B) small (C) changing (D) noticeable34. Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect answer choices change the meaning in important ways or leave out essential information.(A) Most moods and actions are not voluntary because they are actually produced by the production of hormones in the body.(B) Because the effects of hormones are difficult to measure, scientists remain unsure how far-reaching their effects on moods and actions are.(C) When the body is not producing enough hormones, urgent treatment may be necessary to avoid psychological damage.(D) The influence of many hormones is not easy to measure, but they can affect both people’s psychology and actions extensively.35. The word tempered in the passage is closest in meaning to(A) decreased (B) advertised (C) prescribed(D) researched36. Which patients are usually treated with growth hormone?(A) Adults of smaller statue than normal(B) Adults with strong digestive systems(C) Children who are not at risk from the treatment(D) Children who may remain abnormally small37.Which of the following sentences explains the primary goal of hormone WordStrment therapy?These sentences are highlighted in the passage.(A) The quantities and proportions of hormones produced change with age, so scientists have given a great deal of study to shifts in the endocrine system over time in the hopes of alleviating ailments associated with aging.(B) A combination of estrogen and progesterone has been prescribed for decades to women who want to reduce mood swings, sudden changes in body temperature, and other discomforts caused by lower natural levels of those hormones as they enter middle age.(C) HRT may also increase the likelihood that blood clots—dangerous because they could travel through the bloodstream and block major blood vessels—will form.(D) Because of the complicated effects growth hormone has on the body, such treatments are generally restrictedto children who would be pathologically small in stature without it.38. Look at the four squares that indicate where the following sentence could be added to the passage.The body is a complex machine, however, and recent studies have called into question the wisdom of essentially trying to fool its systems into believing they aren’t aging.Where would the sentence best fit?Click on a square to add the sentence to the passage.39. Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.The class of chemicals called hormones was discovered by two researchers studying a substance produced in the small intestine.Answer ChoicesThe term hormone is based on a Greek word that means "to excite" or "to set in motion."Researchers are looking for ways to decrease the dangers of treatments with growth hormone so that more patients can benefit from it.Hormones can be given artificially, but such treatments have risks and must be used carefully.Hormones can affect not only life processes such as growth but also behavior and emotion.Scientists have discovered that not only the nervous system but also certain chemicals can affect bodily processes far from their points of origin.Hormone WordStrment therapy (HRT) may increase the risk of blood clots and heart disease in middle-age women.Answer KeysReading:27. B 28. A 29. D 30. C 31. D 32. C 33. B 34. D35. A 36. D 37. A 38. third square39.1) Scientists have discovered that not only the nervous system….2) Hormones can affect not only life processes…..3) Researchers are looking for ways to decrease the dangers of ….。

小托福考试阅读模拟题及备考技巧分享

小托福考试阅读模拟题及备考技巧分享

小托福考试阅读模拟题及备考技巧分享在小托福考试中,阅读是考生最容易得分的部分了。

因此,考生一定要多多练习,以下为考生分享的就是小托福考试阅读模拟题和备考技巧了,一起来涨知识吧!——小托福考试阅读模拟题:阅读材料(Reading material):Can you remember the first time you learned to ride a bike or drive a car? Learning these skills changed your life forever and opened up new horizons. Learning about computers can be like learning how to ride a bike or drive a car. Once you have invested the time to master the skills, you will never go back to the old days. The new technology is simply too convenient and too powerful.Technological developments through the years have enabled us to do more with less effort. We have continuously looked for better ways of doing things. Each invention and new development has allowed us to extend our capabilities. Today we see one of the most dramatic technologies ever developed—the computer. It extends the capabilities of our minds.Computers have saved organizations millions of dollars. Furthermore, these same computer systems have opened up new opportunities that would have gone undiscovered or neglected. The computer may multiply what we can do, and the return on investment is high. The growth of computer usage is surprising. On the other hand, the computer can do serious damage. Invasion of privacy, fraud, and computer-related mistakes are just a few shocking examples.The computer is like a double-edged sword. It has the ability to cut us free from some activities, but it can also cut deep into profits, personal privacy, and our society in general. How it is used is not a function of technology. It is strictly a function of how people decide to use or misuse this new technology. The choice is yours, and only through a knowledge of computer systems will you be able to avoid the dangers while enjoying the many, many benefits of the computer age.Background Information(背景信息):计算机(computer)俗称电脑,是一种用于高速计算的电子计算机器,可以进行数值计算,又可以进行逻辑计算,还具有存储记忆功能。

最新完整托福模拟题阅读

最新完整托福模拟题阅读

最新完整托福模拟题阅读(一)之巴公井开创作Questions 12-20 The elements other than hydrogen and helium exist In such small quantities that it is accurate to say that the universe somewhat more than 25 percent helium by weight and somewhat less than 25 percent hydrogen. Astronomers hQuestions 12-20The elements other than hydrogen and helium exist In such small quantities that it is accurate to say that the universe somewhat more than 25 percent helium by weight and somewhat less than 25 percent hydrogen.Astronomers have measured the abundance of helium throughout our galaxy and in other galaxies as well. Helium has been found In old stars, in relatively young ones, in interstellar gas, and in the distant objects known as quasars. Helium nuclei have also been found to be constituents of cosmic rays that fall on the earth (cosmic "rays" are not really a form of radiation; they consist of rapidly moving particles of numerous differentkinds). It doesn't seem to make very much difference where the helium is found. Its relative abundance never seems to vary much. In some places, there may be slightly more of it; In others, slightly less, but the ratio of helium to hydrogen nuclei always remains about the same.Helium is created in stars. In fact, nuclear reactions that convert hydrogen to helium are responsible for most of the energy that stars produce. However, the amount of helium that could have been produced in this manner can be calculated, and it turns out to be no more than a few percent. The universe has not existed long enough for this figure to he significantly greater. Consequently, if the universe is somewhat more than 25 percent helium now, then it must have been about 25 percent helium at a time near the beginning..However, when the universe was less than one minute old, no helium could have existed. Calculations indicate that before this time temperatures were too high and particles of matter were moving around much too rapidly. It was only after the one-minute point that helium could exist. By this time, the universe had cooled sufficiently that neutrons and protons could stick together. But the nuclear reactions that led to the formation of helium went on for only a relatively short time. By the time the universe was a few minutes old, helium production had effectively ceased.12. what does the passage mainly explain?(A)How stars produce energy(B)The difference between helium and hydrogen(C)When most of the helium in the universe was formed(D)Why hydrogen is abundant13. According to the passage, helium is(A) the second-most abundant element in the universe(B) difficult to detect(C) the oldest element in the universe(D) the most prevalent element in quasars14. The word "constituents" in line 7 is closest in meaning to(A) relatives (B) causes (C)components (D) targets15. Why does the author mention "cosmic rays't' in line 7?(A)As part of a list of things containing helium(B) As an example of an unsolved astronomical puzzle(C) To explain how the universe began(D) To explain the abundance of hydrogen in the universe16. The word "vary" in line 10 is closest ill meaning to(A) mean (B) stretch (C) change (D) include17. The creation of helium within stars(A) cannot be measured (B) produces energy(C) produces hydrogen as a by-product(D) causes helium to be much more abundant In old stars than In young star:18. The word "calculated" in line 15 is closest in meaning to(A) ignored (B) converted (C) increased (D) determined19. Most of the helium in the universe was formed(A) in interstellar space (B) in a very short time(C) during the first minute of the universe's existence(D) before most of the hydrogen20. The word "ceased" in line 26 is closest in meaning to(A)extended (B)performed (C)taken hold(D)stoppedHormones in the BodyUp to the beginning of the twentieth century, the nervous system was thought to control all communication within the body and the resulting integration of behavior. Scientists had determined that nerves ran, essentially,on electrical impulses. These impulses were thought to be the engine for thought, emotion, movement, and internal processes such as digestion. However, experiments by William Bayliss and Ernest Starling on the chemical secretin, which is produced in the small intestine when food enters the stomach, eventually challenged that view. From the small intestine, secretin travels through the bloodstream to the pancreas. There, it stimulates the release of digestive chemicals. In this fashion, the intestinal cells that produce secretin ultimately regulate the production of different chemicals in a different organ, the pancreas.Such a coordination of processes had been thought to require control by the nervous system; Bayliss and Starling showed that it could occur through chemicals alone. This discovery spurred Starling to coin the term hormone to refer to secretin, taking it from the Greek word hormon, meaning “to excite” or “to set in motion.” A hormone is a chemical prod uced by one tissue to make things happen elsewhere.As more hormones were discovered, they were categorized, primarily according to the process by which they operated on the body. Some glands (which make up the endocrine system) secrete hormones directly into the bloodstream. Such glands include the thyroid and the pituitary. The exocrine system consists of organs and glands that produce substances that are used outside the bloodstream, primarily for digestion. The pancreas is one such organ, although it secretes some chemicals into the blood and thus is also part of the endocrine system.Much has been learned about hormones since their discovery. Some play such key roles in regulating bodily processes or behavior that their absence would cause immediate death. The most abundant hormones have effects that are less obviously urgent but can be more far-reaching and difficult to track: They modify moods and affect human behavior, even some behavior we normally think of as voluntary. Hormonal systems are very intricate. Even minute amounts of the right chemicals can suppress appetite, calm aggression, and change the attitude of a parent toward a child. Certain hormones accelerate the development of the body, regulating growthand form; others may even define a n individual’s personality characteristics. The quantities and proportions of hormones produced change with age, so scientists have given a great deal of study to shifts in the endocrine system over time in the hopes ofalleviating ailments associated with aging.In fact, some hormone therapies are already very common. A combination of estrogen and progesterone has been prescribed for decades to women who want to reduce mood swings, sudden changes in body temperature, and other discomforts caused by lower natural levels of those hormones as they enter middle age. Known as hormone WordStrment therapy (HRT), the treatment was also believed to prevent weakening of the bones. At least one study has linked HRT with a heightened risk of heart disease and certain types of cancer. HRT may also increase the likelihood that blood clots—dangerous because they could travel through the bloodstream and block major blood vessels—will form. Some proponents of HRT have tempered their enthusiasm in the face of this new evidence, recommending it only to patients whosesymptoms interfere with their abilities to live normal lives.Human growth hormone may also be given to patients who are secreting abnormally low amounts on their own. Because of the complicated effects growth hormone has on the body, such treatments are generally restricted to children who would be pathologically small in stature without it. Growth hormone affects not just physical size but also the digestion of food and the aging process. Researchers and family physicians tend to agree that it is foolhardy to dispense it in cases in which the risks are not clearly outweighed by the benefits.27. The word engine in the passage is closest in meaning to(A) desire (B) origin (C) science (D) chemical28. The word it in the passage refers to(A) secretin (B) small intestine (C) bloodstream (D) pancreas29. The word spurred in the passage is closest in meaning to(A) remembered (B) surprised (C) invented (D) motivated30. To be considered a hormone, a chemical producedin the body must(A) be part of the digestive process(B) influence the operations of the nervous system(C) affect processes in a different part of the body(D) regulate attitudes and behavior31. The glands and organs mentioned in paragraph 3are categorized according to(A) whether scientists understand their function(B) how frequently they release hormones into thebody(C) whether the hormones they secrete influence the aging process(D) whether they secrete chemicals into the bloodParagraph 3 is marked with an arrow [→]32. The word key in the passage is closest in meaning to(A) misunderstood (B) precise (C) significant(D) simple33. The word minute in the passage is closest in meaning to(A) sudden (B) small (C) changing (D) noticeable34. Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect answer choices change the meaning in important ways or leave out essential information.(A) Most moods and actions are not voluntary because they are actually produced by the production of hormones in the body.(B) Because the effects of hormones are difficult to measure, scientists remain unsure how far-reaching their effects on moods and actions are.(C) When the body is not producing enough hormones, urgent treatment may be necessary to avoid psychological damage.(D) The influence of many hormones is not easy to measure, but they can affect both people’s psychology and actions extensively.35. The word tempered in the passage is closest in meaning to(A) decreased (B) advertised (C) prescribed(D) researched36. Which patients are usually treated with growth hormone?(A) Adults of smaller statue than normal(B) Adults with strong digestive systems(C) Children who are not at risk from the treatment(D) Children who may remain abnormally small37.Which of the following sentences explains the primary goal of hormone WordStrment therapy?These sentences are highlighted in the passage.(A) The quantities and proportions of hormones produced change with age, so scientists have given a great deal of study to shifts in the endocrine system over time in the hopes of alleviating ailments associated with aging.(B) A combination of estrogen and progesterone has been prescribed for decades to women who want to reduce mood swings, sudden changes in body temperature, and other discomforts caused by lower natural levels of those hormones as they enter middle age.(C) HRT may also increase the likelihood that blood clots—dangerous because they could travel through the bloodstream and block major blood vessels—will form.(D) Because of the complicated effects growth hormone has on the body, such treatments are generally restrictedto children who would be pathologically small in stature without it.38. Look at the four squares that indicate where the following sentence could be added to the passage.The body is a complex machine, however, and recent studies have called into question the wisdom of essentially trying to fool its systems into believing they aren’t aging.Where would the sentence best fit?Click on a square to add the sentence to the passage.39. Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.The class of chemicals called hormones was discovered by two researchers studying a substance produced in the small intestine.Answer ChoicesThe term hormone is based on a Greek word that means "to excite" or "to set in motion."Researchers are looking for ways to decrease the dangers of treatments with growth hormone so that more patients can benefit from it.Hormones can be given artificially, but such treatments have risks and must be used carefully.Hormones can affect not only life processes such as growth but also behavior and emotion.Scientists have discovered that not only the nervous system but also certain chemicals can affect bodily processes far from their points of origin.Hormone WordStrment therapy (HRT) may increase the risk of blood clots and heart disease in middle-age women.Answer KeysReading:27. B 28. A 29. D 30. C 31. D 32. C 33. B 34. D35. A 36. D 37. A 38. third square39.1) Scientists have discovered that not only the nervous system….2) Hormones can affect not only life processes…..3) Researchers are looking for ways to decrease the dangers of ….。

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你要找的小托福考试阅读模拟题在这里!
小托福的词汇量和语法难度相当于大学英语四级的水平,如果考生想要考一个好成绩,一定要多多练习,下文分享的就是小托福考试阅读模拟题,一起阅读下吧~
在阅读部分,文章会涉及到人文学科、科学、社会科学等内容,学生要注意掌握文章主要内容,抓住关键点,了解作者意图并进行推理。

同时,阅读部分的文章形式也十分多样,如电子邮件、信件、新闻、学生写作、广告、日程表等,学生需要在平时积累一些关于习惯用语的表达。

小托福考试阅读模拟题:
模拟题1:
Outflow channels are probably relics of catastrophic flooding on Mars long ago. They appear only in equatorial regions and generally do not form extensive interconnected networks. Instead, they are probably the paths taken by huge volumes of water draining from the southern highlands into the northern plains. The onrushing water arising from these flash floods likely also formed the odd teardrop-shaped “islands” (resembling the miniature versions seen in the wet sand of our beaches at low tide) that have been found on the plains close to the ends of the outflow channels. Judging from the width and depth of the channels, the flow rates must have been truly enormous-perhaps as much as a hundred times greater than the 105 tons per second carried by the great Amazon river. Flooding shaped the outflow channels approximately 3 billion years ago, about the same times as the northern volcanic plains formed.
Question: According to paragraph 2, all of the following are true of the outflow channels on Mars EXCEPT:
A. They formed at around the same time that volcanic activity was occurring on the northern plains.
B. They are found only on certain parts of the Martian surface.
C. They sometimes empty onto what appear to have once been the wet sands of tidal beaches.
D. They are thought to have carried water northward from the equatorial regions.
答案:C
解析:题干问的是原文关于“outflow channels”的描述。

在真正考试中,把原文阅读完毕再去和选项比较会花费较多时间。

因此,比较合理的做题顺序是,先读选项,然后拿选项和原文信息去比对。

A选项说的是outflow channel的形成时间和火山活动在北部平原的发生时间是相同的。

快速浏览原文,只有在最后一句提到了它们的形成时间,说大概在30亿年前,about引导的时间状语很重要,补充说明了这一时间和北部火山平原形成的时间相同。

A正确。

B选项说的是火山形成的地点,只在火星表面的特定区域。

看原文,第二句,说的是它们只在赤道区域出现。

B 也正确。

C选项说的是它们有时候会流到曾经的湿沙地上。

原文在提到tidal beaches时,并没有提到这一信息,因此,C选项是不符合原文的。

D选项说的是河水从赤道(南)向北流动。

和原文第三句话吻合:这些河流的走向是从南部高低到北部平原。

因此,本题的正确答案为C项。

模拟题2:
Other dimensions along which the two groups differ markedly are density and composition. The densities of the terrestrial planets average about 5 times the density of water, whereas the Jovian planets have densities that average only 1.5 times the density of water. One of the outer planets, Saturn, has a density of only 0.7 that of water, which means that Saturn would float in water. Variations in the composition of the planets are largely responsible for the density differences. The substances that make up both group of planets are divided into three groups-gases, rocks, and ices-based on their melting points. The terrestrial planets are mostly rocks: dense rocky and metallic material, with minor amounts of gases. The Jovian planets, on the other hand, contain a large percentage of the gases hydrogen and helium, with varying amounts of ices: mostly water, ammonia, and methane ices.
Question: Paragraph 4 mentions which of the following as a reason why terrestrial planets are dense?
A. They are made up of three groups of substances.
B. They are composed mainly of rocky and metallic materials.
C. They contain more ice than Jovian planets.
D. They contain relatively small amounts of water.
答案:B
解析:题干问的是类地行星密度较大的原因。

那我们只需将做题重点锁定在原文描述“density”的信息上即可。

原文中含有density的句子,第一句在说类地行星的密度和其他行星的密度比。

第二句说的是土星密度。

第三句说到行星结构的不同影响着密度的不同。

后面进一步阐释组成行星的物质:气体,岩石以及冰。

接着又提到类地行星主要由岩石组成。

显然,这就是它密度大的原因。

综合比较,应该选B。

小托福阅读注意要点:搞清楚文章的逻辑关系
考生在阅读文章的时候,一定要搞清楚文章的逻辑关系,这里所说的逻辑关系其实在小托福的阅读部分主要指的就是因果和转折这两种逻辑关系。

一般文章含有这两种逻辑关系的句子都是含有出题点或者重要信息的句子,所以考生们对于这些句子自然要仔细阅读。

考生们在遇到however、but、unfortunately这些表示转折关系的单词的时候要特别注意,凡是含有转折关系的句子,重点一定是在转折以后的内容,而往往这句话也会包含考点。

同学们在日后的复习过程中能够时刻对转折关系的句子带有警惕感,注意其可能的出题点或者重要观点,从而更主动的去应对之后的题目。

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