职称英语考试《理工类》章节练习题精选及答案0517-29
职称英语考试《理工类》章节练习题精选及答案0517-41
职称英语考试《理工类》章节练习题精选及答案0517-411、Arctic MeltEarth's North and South Poles are famous for being cold and icy. Last year, however, the amount of ice in the Arctic Ocean (北冰群) fell to a record low.Normally, ice builds in Arctic waters around the North Pole each winter and shrinks(缩小) during the summer. But for many years, the amount of ice left by the end of summer has been declining.Since 1979, each decade has seen an 11.4 percent drop in end of summer ice cover. Between 1981 and 2000, ice in the Arctic lost 22 percent of its thickness, becoming 1.13 meters thinner. Last summer, Arctic sea ice reached its thinnest levels. By the end of summer 2007, the ice had shrunk to cover just 4.2 million square kilometers. That's 38 percent less area than the average cover at that time of year. And it's a very large 23 percent below the previous record low, which was set just 2 years ago. This continuing trend has made scientists concernedto.There may be several reasons for the ice melt, says Jinlun Zhang, an oceanographer (海洋学家)at the University of Washington in Seattle. Unusually strong winds blew through the Arctic last summer. The winds pushed much of the ice out of the central Arctic, leaving a large area of thin ice and open water. Scientists also suspect that fewer clouds cover the Arctic now than in the past. Clearer skies allow more sunlight to reach the ocean. The extra heat warms both the water and the atmosphere. In parts of the Arctic Ocean last year, surface temperatures were 3.57 Celsius warmer than the average and 1.5c warmer than the previous record.With both air and water getting warmer, the ice is melting from both above and below. In some parts of the Beaufort Sea, north of Alaska and western Canada, ice that measured 3.3 meters thick at the beginning of the summer was measured just 50 cm by season's endThe new measurements suggest that melting is far more severe than the thinking of scientists. Some scientists fear that the Arctic is stuck in a warming trend.The word "builds" in paragraph 2 could be best replaced by ______【单选题】A.establishesB.expandsC.createsD.constructs正确答案:B答案解析:本题难度不大，文章此处build的引申意义指“（冰层）加厚”，选项中expands是其近义解释，答案是B。
职称英语考试《理工类》章节练习题精选及答案0517-86
职称英语考试《理工类》章节练习题精选及答案0517-861、Why Would They Falsely Confess?Why on earth would an innocent person falsely confess to committing a crime? To most people, it just doesn't seem logical. But it is logical, say experts, if you understand what can happen in a police interrogation room.Under the right conditions, people's minds are susceptible to influence, and the pressure put on suspects during police grilling is enormous. "It's a little like somebody's working on them with a dental drill," says Franklin Zimring, a law professor at the University of California at Berkeley. "The pressure is important to understand, because otherwise it's impossible to understand why someone would say he did something he didn't do. The answer is: to put an end to an uncomfortable situation that will continue until he does confess."Developmental psychologist Allison Redlich recently conducted a laboratory study to determine how likely people are to confess to things they didn't do. In her experiment, participantswere seated at computers and told not to hit the "alt" key, because doing so would crash the systems. The researchers then intentionally crashed the computers and accused the participants of hitting the "alt" key to see if they would sign a statement falsely taking responsibility.Redlich's findings clearly demonstrate how easy it can be to get people to falsely confess: 59 percent of the young adults in the experiment immediately confessed. ______ Of the 15-to 16-year-olds, 72 percent signed confessions, as did 78 percent of the 12-to 13-year-olds."There's no question that young people are more at risk," says Saul Kassin, a psychology professor at Williams College, who has done similar studies with similar results, "But adults are highly vulnerable too."Both Kassin and Redlich note that the entire "interrogation" in their experiments consisted of a simple accusation-not hours of aggressive questioning-and still, most participants falsely confessed.Because of the stress of a police interrogation, they conclude, suspects can become convinced that falsely confessing is the easiest way out of a bad situation. "In some ways," says Kassin, "false confession becomes a rational decision."【单选题】A.In her experiment, participants were seated at computers and told not to hit the "alt" key, because doing so would crash the systems.B."In some ways," says Kassin, "false confession becomes a rational decision."C."It's a little like somebody's working on them with a dental drill," says Franklin Zimring, a law professor at the University of California at Berkeley.D."But adults are highly vulnerable too."E.How could an innocent person admit to doing something he didn't do?F.Redlich also found that the younger the participant, the more likely a false confession.正确答案:F答案解析:分析空缺处前后的句子，得知年龄越小越容易错误地妥协。
职称英语考试《理工类》章节练习题精选及答案0517-80
职称英语考试《理工类》章节练习题精选及答案0517-801、Weaving with LightIn the Sierra Madre mountain range of west central Mexico, the native Huichol people live much the way their ancestors did-without electricity. That's because it's too expensive to string power lines to the remote mountain areas where they live. To help support themselves, the Huichol create beautiful artwork. They sell their art in cities hundreds of miles away from their villages. And without electricity, at home or on the road, they can only work during daylight hours. When it gets dark, they must stop whatever they're doing.Now, a team of scientists, designers and architects is using new technologies to provide the Huichol with light after the sun sets. The scientists technique involves weaving tiny electronic crystals into fabrics that can be made into clothes, bags, or other items.By collecting the sun's energy during the day, these lightweight fabrics provide bright white light at night. Their inventors havenamed the fabrics "Portable Lights," Portable Lights have the potential to transform the lives of people without electricity around the world, says project leader Sheila Kennedy."Our invention," Kennedy says, "came from seeing how we could transform technology we saw every day in the United States and move it into new markets for people who didn't have a lot of money."At the core of Portable Light technology are devices called high - brightness light - emitting diodes, or HB LEDs. These tiny lights appear in digital clocks, televisions and streetlights.LEDs are completely different from the light bulbs. Most of those glass bulbs belong to a type called incandescent lights. Inside, electricity heats a metal coil to about 2,200 degrees Celsius. At that temperature, bulbs give off light we can see. Ninety percent of energy produced by incandescent lights, however, is heat and invisible. With all that wasted energy, bulbs burn out quickly. They are also easily broken.LEDs, on the other hand, are like tiny pieces of rock made up of molecules that are arranged in a crystal structure. When an electric current passes through an LED, the crystal structure produces light. Unlike incandescent bulbs, they can produce light of various colors. Within an LED, the type of molecules andtheir particular arrangement determines what color is produced.The Huichol don't use electricity because ______. 【单选题】A.it is too difficult for them to change their lifestyleB.they know nothing about itC.it costs too much to string power linesD.they don't need it正确答案:C答案解析:本题有一定难度，关键在吃透句意，答案依据比较明显，带着题干信息词回文章定位，答案依据主要在文章第一段第二句：That's because it's too expensive to string power lines to the remote mountain areas where they live．谈到将电力设施铺设到山里投资巨大，string是引申意义，此处是“铺设”的意思，回来看选项，C项和原文句意相符，答案是C。
职称英语考试《理工类》章节练习题精选及答案0517-37
职称英语考试《理工类》章节练习题精选及答案0517-371、Meet Your Memory1. Memory is something that cannot be seen, touched or weighed. It is thought to be abstract. It is a set of skills rather than an object. Neither is there a single standard for judging a good or poor memory. There are a number of different ways in which a person may have a good memory.2. Memory is generally viewed as consisting of three stages: (1) acquisition refers to learning the material; (2) storage refers to keeping the material in the brain until it is needed; (3) retrieval (提取) refers to getting the material back out when it is needed:3. Memory consists of at least two different processes: short -term memory and long - term memory. Short - term memory has a limited capacity and a rapid forgetting rate. Its capacity can be increased by chunking (组成大块), or grouping separate bits of information into larger chunks. Long - term memory has an almost unlimited capacity.4. One measure of memory is recall, which requires you to produce information by searching the memory for it. In aided recall, you are given cues (提示) to help you produce the information. In free -recall learning you recall the material in any order. In serial learning you recall it in the order it was presented and in paired - associate learning you learn pairs of words so that when the first word is given you can recall the second word. A second measure of memory is recognition, in which you do not have to produce the information from memory, but must be able to identify it when it is presented to you. In a third measure of memory, relearning, the difference between how long it took to learn the material the first time and how long it takes to learn it again indicates how much you remember. Relearning is generally a more sensitive measure of memory than is recognition because relearning shows retention (保持) while recognition does not. Recognition is generally a more sensitive measure than recall.Paragraph 1 ______【单选题】A.Why do we forget things?B.How do we measure memory?C.What are the stages memory consists of?D.What is the difference between short -term memory and long - term memory?E.What is memory?F.Who may have a poor memory?正确答案:E答案解析:本题有一定难度，没有明显的主旨句，需要较强归纳能力。
职称英语考试《理工类》章节练习题精选及答案0517-18
职称英语考试《理工类》章节练习题精选及答案0517-181、Black HolesMost scientists agree that black holes exist but are nearly impossible to locate. A black hole in the universe is not a solid object, like a planet, but it is shaped like a sphere (球体). Astronomers (天文学家) think that at the center of a black hole there is a single point in space with infinite (无限的) density (稠密).This single point is called a singularity (奇点). If the singularity theory is correct, it means that when a massive star collapses, all the material in it disappears into the singularity. The center of a black hole would not really be a hole at all, but an infinitely dense point. Anything that crosses the black hole is pulled in by its great gravity.Although black holes do exist, they are difficult to observe. These are the reasons,?No light or anything else comes out of black holes. As a result,they are invisible to a telescope.?In astronomical terms, black holes are truly. For example, a black hole formed by the collapse of a giant star would have an event horizon (视界) only 18 miles across.?The nearest black holes would be dozens of light years away from Earth. One light year is about 6 trillion (万亿) miles. Even the most powerful telescopes could not pick out an object so small at such a great distance.In 1994 the Hubble Space Telescope provided evidence that black holes exist. There are still answers to be found, however, so black holes remain one of the mysteries of the universe. (2007年)The sun is the heaviest star in the universe.【单选题】A.RightB.WrongC.Not mentioned正确答案:C答案解析:题干大意：在宇宙中，太阳是最重的星体。
职称英语考试《理工类》章节练习题精选及答案0517-75
职称英语考试《理工类》章节练习题精选及答案0517-751、Snow RangerThe two things, snow and mountains, which are needed for a ski area are the two things that cause avalanches, large mass of snow and ice crushing down the side of a mountain, often called "White Death. "It was the threat of the avalanche and its record as a killer of man in the western mountains that created the snow ranger. He first started on avalanche control work in the winter of 1937, 38 at Alta, Utah, in Wasatch National Forest.This mountain valley was becoming well known to skiers. It was dangerous. In fact, more than 120 persons had lost their lives in 1936 and another 200 died in 1937 as a result of avalanches before it became a major ski area.Thus, development of Alta and other major ski resorts in the west was dependent upon controlling the avalanche. The Forest Service set out to do it, and did with its corps of snow rangers.It takes many things to make a snow ranger. The snow ranger must be in excellent physical condition. He must be a good skier and a skilled mountain climber. He should have at least a high school education, and the more college courses in geology, physics, and related fields he has, the better.He studies snow, terrain, wind, and weather. He learns the conditions that produce avalanches. He learns to forecast avalanches and to bring them roaring on down the mountainsides to reduce their killing strength. The snow ranger learns to do this by using artillery, by blasting with TNT, and by the difficult and skillful art of skiing avalanches down.The snow ranger, dressed in a green parka which has a bright yellow shoulder patch, means safety for people on ski slopes. He pulls the trigger on a 75 mm. Recoilless rifle, skis waist deep in powder testing snow stability, or talks with the ski area's operator as he goes about his work to protect the public from the hazards of deep snow on steep mountain slopes.The snow rangers are employees of____.【单选题】A.the Forest Service.B.the Resource Bureau.C.the Tourist Board.D.the Sports Bureau.正确答案:A答案解析:借助备选答案的特点：答案都是专有名词（首字母都大写且名词前有定冠词the），所以可在文章中迅速查找首字母大写的专有名词然后确认答案。
职称英语考试《理工类》章节练习题精选及答案0517-127
职称英语考试《理工类》章节练习题精选及答案0517-1271、Inventor of LEDWhen Nick Holonyak set out to create a new kind of visible lighting using semiconductor alloys, his colleagues thought he was unrealistic. Today, his discovery of light-emitting diodes, or LEDs, are used in everything from DVDs to alarm clocks to airports. Dozens of his students have continued his work, developing lighting used in traffic lights and other everyday technology.On April 23,2004, Holonyak received the $500,000 Lemelson-MIT Prize at a ceremony in Washington. This marks the lOth year that the Lemelson-MIT Program at the Massachusetts Institute of Technology (MIT) has given the award to prominent inventors. "Anytime you get an award big or little. It＇s always a surprise. " Holonyrak said. Holonyak, 75, was a student of john Bardeen, an inventor of the transistor, in the early 1950s. After graduate school, Holonyak worked at Ben Labs. He later went to General Electric, where he invented aswitch now widely used in house dimmer switches.Later, Holonyak started looking into how semiconductors could be used to generate light. But while his colleagues were looking at how to generate invisible light, he wanted to generate visible light. The LEDS he invented in 1962 now last about 10 times longer than incandescent bulbs, and are more environmentally friendly and effective.Holonyak, now a professor of electrical and computer engineering and physics at the University of Illinois, said he suspected that LEDs would become as commonplace as they are today, but didn＇t realize how many uses they would have. "You don＇t know in the beginning. You think you＇re doing something important. You think it＇s worth doing, but you really can＇t tell what the big payoff is going to be, and when, and how. You just don＇t know, "he said.The Lemelson. MIT Program also recognized Edith Flanigen, 75, with the $100,000 Lemelson-MIT Lifetime Achievement Award for her work on a new generation of "molecular sieves", that can separate molecules by size.Holonyak was the inventor of the transistor in the early 1950s. 【单选题】A.RightB.WrongC.Not mentioned正确答案:B答案解析:答案相关句：Holonyak, 75，was a student of John Bardeen，an inventor ofthe transistor，in the early 1950s（该句所反映的内容是：John Bardeen是20世纪50年代初期晶体管的发明者），问题句的内容与原文的内容不一致，因此选B。
职称英语考试《理工类》章节练习题精选及答案0517-10
职称英语考试《理工类》章节练习题精选及答案0517-101、Science Fiction1 Amongst the most popular books being written today are those that are usually classified asscience fiction. Hundreds of titles are published every year and are read by all kinds of people.Furthermore, some of the most successful films of recent years have been based on science fiction stories.2 It is often thought that science fiction is a fairly new development in literature, but its ancestors can be found in books written hundreds of years ago. These books were often concerned with the presentation of some forms of ideal society,a theme that is still often found in modern stories.3 Most of the classics of science fiction, however, have been written within the last hundred years. Books by writers such as Jules Verve and H. G Wells, to mention just two well known authors, have been translated into many languages.4 Modern science fiction writers don't write about men from Mars or space adventure stories. They are more interested in predicting the results of technical developments on society and the human mind; or in imagining future worlds that are a reflection of the world that we live in now. Because of this their writing has obvious political undertones (涵义).5 In an age where science fact frequently overtakes (超过) science fiction, the writers may find it difficult to keep ahead of scientific advances. Those who are sufficiently clear-sighted to see the way we are going, however, may provide a valuable lesson on how to deal with the problems which society will inevitably face as it tries to master its new technology.Works of modern science fiction have____.【单选题】A.concerned with the problems that we will have to solve in the futureB.reading books of science fictionC.political implicationD.a recurrent themeE.read worldwideF.translated into many languages正确答案:C答案解析:本题答案的依据在第4段最后一句，该句说Because of this their writing has obvious political undertones （由于这一原因，他们的作品带有明显的政治涵义）。
职称英语考试《理工类》章节练习题精选及答案0517-81
职称英语考试《理工类》章节练习题精选及答案0517-811、Cell Phones1. Believe it or not, cell phones have been around for over a quarter of a century. The first commercial cell phone system was developed by the Japanese in 1979, but cell phones have changed a lot since that time. The early cell phones were big and heavy but they have developed into small and light palm sized models. There are huge developments in their functions, too. We have had call forwarding, text messaging, answering services and hands - free use for years, but now there are new facilities, such as instant access to the Internet and receiving and sending photos.2. Cell phones have become very common in our lives. Recent statistics suggest one in three people on the planet now have cell phone, and most of them say they couldn't live without one, Cell phones are used in every area of our lives and have become a necessary tool, used for essential arrangements, social contact and business. It easier to call for help on thehighway. It possible to keep in touch with people "on the move" when people are traveling.3. Cell phones have made communication easier and have reduced the need for family arguments f We can use cell phones to let our family know we'll be late or if there's a sudden change of plan or an emergency. Cell phones have eased the worries of millions of parents when their teenagers are out late. They can now contact their children at any time.4. This does not mean that cell phones are all good news. Cell phones have brought with them a number of new headaches for their owners. It costs a lot to replace stolen phones, It is becoming a frequent occurrence, and have you ever seen such a huge phone bills? More serious, however, Cell phones bring the potential health problem. There are fears that radiation from the phones may cause brain tumor(肿瘤). This may be a time bomb waiting to happen to younger people who have grown up with cell phones. They simply can't live without cell phones!Paragraph 4 ______【单选题】A.Cell phones and the familymercial cell phone systemsC.Cell phones in everyday lifeD.Cell phones for teenagersE.History of cell phonesF.Problems with cell phones正确答案:A答案解析:本题难度不大，主旨句比较明显，就是第三段的第一句：手机让交流变得容易，也减少了家庭争论。
职称英语考试《理工类》章节练习题精选及答案0517-121
职称英语考试《理工类》章节练习题精选及答案0517-1211、Cell Phone Lets Your Secret OutYour cell phone holds secrets about you. Besides the names and numbers that you've programmed into it, traces of your DNA linger on the device, according to a new study.DNA is genetic material that appears in every cell. Like your fingerprint, your DNA is unique to you- because you have an identical twin. Scientists today routinely analyze DNA in blood, saliva, or hair left ______ at the scene of a crime. The results often help detectives identify criminals and their victims. Your cell phone can reveal more about you than you might think. Meghan J. McFadden, a scientist at McMaster University in Hamilton, Ontario, heard about a crime in which the suspect bled onto a cell phone and later dropped the device. This made her wonder whether traces of DNA lingered on cell phones even when no blood was involved. So she and colleague Margaret Wallace of the City University of New York analyzed the flip open phones of 10 volunteers. They used swabs tocollect invisible traces of the users from two parts of the phone: the outside, where the user holds it, and the speaker, which is placed at the user's ear.The scientists scrubbed the phones using a solution made mostly of alcohol. The aim of washing was to remove all detectable traces of DNA. The owners got their phones back for another week. Then the researchers collected the phones and repeated the swabbing of each phone once more.The scientists discovered DNA that belonged to the phone's speaker on each of the phones. Better samples were collected from the outside of each phone, those swabs also picked up DNA that belonged to other people who had apparently also handled the phone. Surprisingly, DNA showed up even in swabs that were taken immediately after the phones were scrubbed. That suggests that washing won't remove all traces of evidence from a criminal's device. So cell phones can now be added to the list of clues that can clinch a crime scene investigation.【单选题】A.aboutB.inC.forD.behind正确答案:D答案解析:leave behind是固定搭配，意即：留下。
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职称英语考试《理工类》章节练习题精选及
答案0517-29
1、Houses of Future
What will houses be like in thirty years' time? No one really knows, but architects are trying to predict what our home will be likeE.
Future houses will have to be flexible. In thirty years' time even more of us will be working at home. So we will have to be able to use areas of the house for work for part of the day and for living for the rest. Families grow and change with children arriving, growing up and leaving home. The house ofthe future will have to grow and change with the familyF, nothing will be as fixed as it is now. The house will always be changing to meet changing needs.
Everyone agrees that in thirty years' time we will be living in "intelligent" houses. We will be able to talk to our kitchen machines and discuss with them what to do. Like this, "we'll be having a party this weekend. What food shall we cook?" ______. We will be able to leave most of the cooking to the machines,
just tasting things from time to time to check.
The house of the future will be personal-each house, you will be able to change the color ofthe wall easily, you won't have to paint them, you'll be able to tell the wall to change the color! And if you don't like the color the next day, you will be able to have a new one. The only thing you won't be able to do is moving the house somewhere else.
【单选题】
A.you will be able to change the color ofthe wall easily
B.The only thing you won't be able to do is moving the house somewhere else
C.And the machine will tell us what food we will have to buy and how to cook it
D.what our home will be likeE
E.The house ofthe future will have to grow and change with the
familyF
F.he kids might take their bedrooms with them as they have
正确答案:C
答案解析:意思是“智能机器会告诉我们需买的食材和烹饪的方法”，与文章中智能机器如何工作相符。
1、A Bad Idea
Think you can walk, drive, take phone calls, e - mail and listen to music at the same time 7 Well, New York's new law says you can't. _____. The law went into force last month, following research and a shocking number of accidents that involved people using electronic gadgets (小巧机械) when crossing the street.
Who's to blame? Scientists say that our multitasking (多任务处理) abilities are limited. "We are under the impression that our brain can do more than it often can," says Rene Marois, a neuroscientist (神经科学家) in Tennessee. "But a core。