职称英语理工A级补全短文A级阅读判断+概括大意
职称英语考试真题及答案理工类A级补全短文
职称英语考试真题及答案理工类A级补全短文2016年职称英语理工类A级补全短文考试真题及答案第四部分补全短文Researchers Discover Why Humans Began Walking UprightMost of us walk and carry items in our hands every day. These are seemingly simple activities that the majority of us don’t question. But an international team of researchers, including Dr. Richmond from GW's Columbian College of Arts and Sciences，have discovered that human walking upright, may have originated millions of years ago as an adaptation to carrying scarce, high- quality resources. The team of researchers from the U. S., England, Japan and Portugal investigated the behavior of modern-day chimpanzees as they competed for food resources，in an effort to understand what ecological settings would lead a large ape — one that resembles the 6 million-year old ancestor we shared in common with living chimpanzees — to walk on two legs.“These chimpanzees provide a model of the ecological conditions under which our earliest ancestors might have begun walking on two legs, "，said Dr. Richmond.The research findings suggest that chimpanzees switch to moving on two limbs instead of four in situations where they need to monopolize a resource. Standing on two legs allows them to carry much more at one time because it frees up their hands. Over time，intense bursts of bipedal activity may have led to anatomical changes that in turn became the subject of natural selection where competition for food or other resources was strong.Two studies were conducted by the team in Guinea. The first study was conducted by the team in Kyoto University’s “ outdoor laboratory ” in a natural clearing in Bossou Forest.Researchers allowed the wild chimpanzees access to different combinations of two different types of nut — the oil palm nut，which is naturally widely available, and the coula nut, which is not. The chimpanzees’ behavior was monitored in three situations:(a) when only oil palm nuts wereavailable,(b)when a small number of coula nuts were available，and(c) when coula nuts were the majority available resource.When the rare coula nuts were available only in small numbers, the chimpanzees transported more at one time. Similarly, when coula nuts were the majority resource, the chimpanzees ignored the oil palm nuts altogether. The chimpanzees regarded the coula nuts as a more highly-prized resource and competed for them more intensely.In such high-competition settings，the frequency of cases in which the chimpanzees started moving on two legs increased by a factor of four. Not only was it obvious that bipedal movement allowed them to carry more of this precious resource, but also that they were actively trying to move as much as they could in one go by using everything available 一 even their mouths.The second study, by Kimberley Hockings of Oxford Brookes University, was a 14-month study of Bossou chimpanzees crop-raiding, a situation in which they have to compete for rare and unpredictable Resources. Here, 35 percent of the chimpanzees activity involved some sort of bipedal movement, and once again, this behavior appeared to be linked to a clear attempt to carry as much as possible at one time.参考答案： BAEFC。
职称英语理工类A级(概括大意与完成句子)模拟试卷2(题后含答案及解析)
职称英语理工类A级（概括大意与完成句子）模拟试卷2(题后含答案及解析)题型有： 3. 概括大意与完成句子概括大意与完成句子(第23-30题，每题1分，共8分)下面的短文后有2项测试任务：(1)第23-26题要求从所给的6个选项中为第2-5段每段选择一个最佳标题；(2)第27-30题要求从所给的6个选项中为每个句子确定一个最佳选项。
How Room Designs Affect Our Work and Feelings Architects have long had the feeling that the places we live in can affect our thoughts, feelings and behaviors. But now scientists are giving this feeling an empirical(经验的，实证的)basis. They are discovering how to design spaces that promote creativity, keep people focused and lead to relaxation. Researches show that aspects of the physical environment can influence creativity. In 2007, Joan Meyers-Levy at the University of Minnesota, reported that the height of a room’s ceiling affects how people think. Her research indicates that higher ceilings encourage people to think more freely, which may lead them to make more abstract connections. Low ceilings, on the other hand, may inspire a more detailed outlook. In additions to ceiling height, the view afforded by a building may influence an occupant’s ability to concentrate. Nancy Wells and her colleagues at Cornell University found in their study that kids who experienced the greatest increase in greenness as a result of a family move made the most gains on a standard test of attention. Using nature to improve focus of attention ought to pay off academically, and it seems to, according to a study led by C. Kenneth Tanner, head of the School Design & Planning Laboratory at the University of Georgia. Tanner and his team found that students in classrooms with unblocked views of at least 50 feet outside the window had higher scores on tests of vocabulary, language arts and maths than did students whose classrooms primarily overlooked roads and parking lots. Recent study on room lighting design suggests that dim(暗淡的)light helps people to loosen up. If that is true generally, keeping the light low during dinner or at parties could increase relaxation. Researchers of Harvard Medical School also discovered that furniture with rounded edges could help visitors relax. So far scientists have focused mainly on public buildings. “We have a very limited number of studies, so we’re almost looking at the problem through a straw(吸管),”architect David Allison says. “How do you take answers to very specific questions and make broad, generalized use of them? That’s what we’re all struggling with. “A. Empirical experimentsB. View affects people’s concentrationC. Physical environment affects how people thinkD. More efforts should be put on the researchE. Dim light and rounded furniture help people relaxF. House building1．Paragraph 2______.正确答案：C解析：第二段主题句为第一句，其意思是：研究证明实体环境会影响人的创新能力。
职称英语综合A级 概括大意练习及答案(2)
XX职称英语综合A级概括大意练习及答案(2)概括大意与完成句子题 Stanford University 1 Stanford University is sometimes called "the Harvard of the West." The closeness of Stanford to San Francisco, a city thirty-two miles to the north, gives the university a decidedly cosmopolitan (世界性的) flavor. 2 The students are enrolled mainly from the western United States. But most of thefifty states send students to Stanford, and many foreign students study here, as well. And standards for admission remain high. Young men and women are selected to enter the university from the upper fifteen percent of their high school classes. 3 Not only because of the high caliber (素质) of its students but also because of the desirable location and climate, Stanford has attracted to its faculty some of the world's most respected scholars. The university staff has included many Nobel Prize winners in various fields. Stanford's undergraduate school of engineering and its graduate schools of business, law, and medicine are especially well-regarded. 4 What is student life like on "The Farm"? Culturally, the campus is a mag for both students and citizens of nearby munities. Plays, concerts, and operas are performed in the university's several auditoriums and in its outdoor theater, where graduations are also held. Several film series are presented during the school year. Guest lecturers from public and academic lifefrequently appear on campus. For the sports-minded, the Stanford campus offers highly developed athletic facilities. Team sports, swimming, and track and field activity are all very much part of the Stanford picture. So are bicyclingand jogging. 5 In addition to financial support from alumni (校友), Stanford receives grants from the government and from private charities. In recent years, government grants have made possible advanced studies in the fields of history, psychology, education, and atomic energy. At present Stanford is carrying out an ambitious building program, financed in part by the Ford Foundation's 25million grant. Recently added to the campus are a new physics building, new school of business, new graduate school of law, new student union and undergraduate library.1 Paragraph2 . 2 Paragraph3 . 3 Paragraph4 . 4 Paragraph5 . A Colorful Life on Campus B In igent Student Body C School Administration D Distinguished Faculty E Substantial Financial Support F The Harvard of the West 5 Those high school graduates who can enter Stanford University .6 Many professors like to teach in this university partly because here .7 On the faculty of the university there are .8 Financial support from both private organizations and the government has made possible . A they can find the best students B the university's academic advancement andphysical extension C some of the most distinguishedscholars of the world D where a sports meet is held every year E must have been the top students in their classes F must be hardworking 【参考答案】1. B 2. D 3. A 4. E 5. E 6.A 7. C 8. Bxx职称英语综合A级：概括大意练习及答案(2)。
2015年职称英语(综合类)A级真题试卷(题后含答案及解析)
2015年职称英语（综合类）A级真题试卷(题后含答案及解析)题型有：1. 词汇选项 2. 阅读判断 3. 概括大意与完成句子 4. 阅读理解 5. 补全短文6. 完形填空词汇选项(第1-15题，每题1分，共15分)下面每个句子中均有1个词或短语在括号中，请为每处括号部分的词汇或短语确定1个意义最为接近选项。
1．I will not tolerate that sort of behavior in my class.A．controlB．observeC．regulateD．accept正确答案：D解析：句意：我绝不容许在我的课上出现这种行为。
tolerate意为“忍受,忍耐”，与accept(接受,容许)意思比较相近。
control控制；observe观察,遵守；regulate 调节,规定。
2．She showed a natural aptitude for the work.A．senseB．talentC．flavourD．taste正确答案：B解析：句意：她表现出了做这项工作的天赋。
aptitude意为“天资,才艺”，与talenl,(天赋,天分)意思比较相近。
sense感觉,感官；flavor风味,滋味；taste味道,品味。
3．Most people find rejection hard to accept.A．excuseB．clientC．refusalD．destiny正确答案：C解析：句意：大多数人发现很难接受被拒绝。
rejection意为“拒绝”，与refusal(拒绝,推却)意思比较相近。
excuse借口,理由；client客户,顾客；destiny命数,定数。
4．The organization was bold enough to face the press.B．powerfulC．braveD．sensible正确答案：C解析：句意：该团体有足够的勇气面对压力。
职称英语理工A级、B级、C级概况大意与完成句子答案及解析
职称英语理工A级、B级、C级概况大意与完成句子答案及解析以下是关于2015年职称英语理工A级、B级、C级概况大意与完成句子答案及解析汇总，需要的同学们可以参考下。
2015年职称英语理工A级概况大意与完成句子答案及解析：第三部分：概况大意与完成句子First Image-recognition Software1.Dartmouth researchers and their colleagues have created an artificial 1 ,software that uses photos to locate documents on the Internet with far greater than ever before.2.The new system, which was tested on photos and is now being applied to , I shows for the first time that a machine learning algorithm (运算法则)or ,ma9e I recognition and retrieval is accurate and efficient enough to improve large seaie , document searches online. The system uses pixel (像素)data in images and potentia y video ; rather than just text ; to locate documents. It learns to recognize the pixels associated with a search phrase by studying the results from text-based image search engines. The knowledge gleaned (收集) from those results can then be applied to other photos without tags or captions making for more accurate document search results.A. Popularity of the new systemB. Publication of the new discoveryC. Function of the new systemD. Artificial intelligence software createdE. Problems of the existing search enginesF. Improvement in document retrieval2015年职称英语理工B级概况大意与完成句子答案及解析：第三部分：概况大意与完成句子First Image-recognition Software1.Dartmouth researchers and their colleagues have created an artificial Intelligence software that uses photos to locate documents on the Internet with far greater than ever before.2.The new system, which was tested on photos and is now being applied to , which shows for the first time that a machine learning algorithm (运算法则) for image recognition and retrieval is accurate and efficient enough to improve large seaie , document searches online. The system uses pixel (像素)data in images and potentially video ; Rather than just text ; to located documents. It learns to recognize the pixels associated with a search phrase by studying the results from text-based image search engines. The knowledge gleaned (收集) from those results can then be applied to other photos without tags or captions making for more accurate document search results.3."Over the last 30 years," says Associate Professor Lorenzo Torresani, a co-author of the study, "the Web has evolved from a small collection of mostly text documents to a modern, massive, fast-growing multimedia dataset, where nearly every page includes multiple pictures or videos. When a person looks at a Web page, he immediately gets the gist (主旨)of it by looking at the pictures in it. Yet, surprisingly,all existing popular search engines, such as Google or Bing, strip away the information contained in the photos and use exclusively the text of Web pages to perform the document retrieval. Our study is the first to show that modern machine vision systems are accurate and efficient enough to make effective use of the information contained in imagepixels to improve document search.;A. information in imagesB. current popular search enginesC. using photosD. machine vision systemsE. document searchF. description of the HTML page2015年职称英语理工C级概况大意与完成句子答案及解析：第三部分：概况大意与完成句子New research lights the way to super-fast computers1.New research published today in the journal Nature Communications, has demonstrated how glass can be manipulated to create a material that will allow computers to transfer information using light. This development could significantly increase computer processing speeds and power in the future.A Expectation of the discoveryB the problem of current computersC A new findingD The purpose of the researchE Public reaction to the discoveryF The use of the new material。
职称英语A级概括大意题答案「综合类」
xx年职称英语A级概括大意题答案「综合类」为了帮助大家备考xx年的'考试，了xx年的职称英语试题，希望能帮到大家!1 A hundred years ago this week, a giganticexplosion ripped (撕裂) open the day y above a forest in western Siberia, leaving ascientific riddle that endures to this day.2 A dazzling light pierced the heavens,followed by a shock wave as strong as 1,000 atomic bombs. The explosionflattened 80 million trees across an area of 2,000 square kilometers. Thefireball was so great that, a day later, Londoners could read their newspapersunder the night sky. What caused the so-called Tunguska Event, named after thenearby Podkamennaya Tunguska river, still remains a mystery.3 Experts suspect it was a rock that, aftertraveling in space for millions of years, was destined to crash to Earth atexactly 7:17 a.m. on June 30, 1908. This possibility worries scientists.“Imagine an unspotted asteroid (小行星) hitting a significant chunk(块) of land ... and imagine if that area, unlike Tunguska, werepopulated,” the British science journal Nature mented recently.4 But no fragments of the “rock” have everbeen found. Finding such evidence would be important, for it would increase ourknowledge about the risk posed by dangerousNear Earth Objects (NEOs), sayItalian researchers Luca Gasperini, Enrico Bonatti and Giuseppe Longo. When thenext Tunguska NEO approaches, scientists will have to decide whether to try todeflect (使偏转) it or blowit up in space.5 However, several rival theories for theTunguska Event exist. Wolfgang Kundt, a professor at Germany's Bonn University,believes the Tunguska Event was caused by a massive escape of 10 million tonsof methane(甲烷)-rich gasfrom deep within earth's crust. Some people hold that the explosion was causedby an alien spaceship crash, or a black hole in the universe.23. Paragraph 224. Paragraph 325. Paragraph 426. Paragraph 5A. Competing ExplanationsB. Unknown AttacksC. Mysterious ExplosionD. Star WarE. Importance of Finding EvidenceF. Explanation that Worries Scientists27. The giganticexplosion that ourred a hundred years ago28. The shock wavewhich followed the dazzling light29. The hypothesisthat the explosion was caused by a rock colliding with the Earth30. Wolfgang Kundt,who has developed an alternative theoryA. has remained a puzzleB. lacks sufficient evidenceC. is a university professorD. was generated by the explosionE. will kill many animalsF. are attacked by aliensCFEAADBC。
职称英语理工类A级考试：补全短文
职称英语理工类A级考试：补全短文2017年职称英语理工类A级考试：补全短文补全短文是职称英语试卷上比较难的题型之一。
该题型共1篇文章，5道小题，所占分值为10分。
下面是yjbys网店铺提供给大家关于职称英语理工类A级考试：补全短文，希望对大家的备考有所帮助。
The First Four MinutesWhen do people decide whether or not they want to become friends? During their first four minutes together, according to a book by Dr. Leonard Zunin. In his book, "Contact: The first four minutes", he offers this advice to anyone __(1)___: "Every time you meet someone in a social situation, give him your undivided attention for four minutes. A lot of people’s whole lives would change if they did just that".You may have noticed that the average person does not give his undivided attention to someone he has just met. He keeps looking ove r the other person’s shoulder, as if __(2)__. If anyone has ever done this to you, you probably did not like him very much.When we are introduced to new people, the author suggests, we should try to appear friendly and self-confident. In general, he says, "People like people who like themselves".On the other hand, we should not make the other person think we are too sure of ourselves. It is important to appear interested and sympathetic, realizing that the other person has his own needs, fears, and hopes.Hearing such advice, one might say, "But I’m not a friendly, self-confident person. That’s not my nature. It would be dishonest for me to act that way".In reply, Dr. Zunin would claim that a little practice can helpus __(3)__. We can become accustomed to any changes we choose to make in our personality. "It is like getting used to a new car. It may be unfamiliar at first, but it goes much better than the old one."But isn’t it dishonest to give the appearance of friendly self-confidence when we don’t act ually feel that way? Perhaps, but according to Dr. Zunin, ’total honesty" is not always good for social relationships, especially during the first few minutes of contact. There is a time for everything, and a certain amount of play-acting may be best for the first few minutes of contact with a stranger. That is not the time to complain about one’s health or to mention faults one finds in other people. It is not the time to tell the whole truth about one’s opinions and impressions.Much of __(4)__ also applies to relationships with family members and friends. For a husband and wife or a parent and child, problems often arise during their first four minutes together after they have been apart. Dr. Zunin suggests that these first few minutes together be treated with care. If there are unpleasant matters to be discussed, they should be dealt with later.The author says that interpersonal relations should be taught as a required course in every school, along with reading, writing, and mathematics. In his opinion, success in life depends mainly on __(5)_. That is at least as important as how much we know.EXERCISE:A) Feel comfortable about changing our social habitsB) What has been said about strangersC) How we get along with other peopleD) Interested in starting new friendshipsE) Hoping to find someone more interesting in another partof the roomF) Who are eager to make friends with everyoneKEY: D E A B C。
职称英语真题之综合类A级概括大意
职称英语真题之综合类A级概括大意为了方便广大学员更好的备考职称英语考试，考试大外语站点编辑特收集整理了2008年职称英语真题之综合类A级概括大意，希望能帮助学员有效复习。
2008年职称英语真题之综合类A级概括大意:第3部分：概括大意与完成句子(第23～30题，每题1分，共8分)下面的短文后有2项测试任务：(1)第23~26题要求从所给的6个选项中为第2～5段每段选择1个标题；(2)第27~30题要求从所给的6个选项中为每个句子确定1个选项。
A New Citizenship Test1 Last week a sample of the new US citizenship(公民身份)exam was released by the US Citizenship and Immigration Services(US—CLS )．It will be tried out in 1 0 cities early next year to replace the current test in 2008．Instead of asking how many stripes the USflag has，as the current test does，the new one asks why there are 13 stripes。
Instead ofhaving to name the branches of government，an applicant is asked to explain why thereare three．2 “The goal is to make it more meaningful．”explains Emilio Gonzalez，director of theUS—CIS。
Immigrants who pass it are expected to have a better“understanding and respect”for US civic(公民的)values，Gonzalez says.3 The US isn’t the only country dealing with citizenship tests that aim to get a“ sharedcommitment”from immigrants for their adopted country’s“values”，In recent years，Inaddition to the usual requirement of language/work skills and economic status-severalEuropean countries have adopted citizenship tests．Britain introduced a new citizenshiptest last November．In March，a new Dutch law took effect requiring all would—beimmigrants to take a citizenship test．It involved watching a videoshowing nude(裸体的)women bathing at beaches and gay(同性恋的)men kissing in public．The aim was toensure that“newcomers will be comfortab le with the country’S liberal social mores(风俗)”.4 Europe has been known for welcoming immigrants for decades．But，today，the fact is that some immigrants are kept apart from local citizens by culture and they becomehostile to each other．Promoting integration has become a major concern for Europeancountries．after the rioting in Muslim ghettoes(少数民族聚居区)in France and the killingof Dutch public figures by religious extremists．5 Officials believe that a person’s attachment to a country can be tested by his or herknowledge of the country．However，some critics say that the changes can do little to helppeople’assimilate(同化)themselves．“Immigration is a culture war today-Is giving a newtest the right way to lessen the accusations in that fight?”says Ali Noorani ，of theMassachusetts Immigrant and Refugee Advocacy Coalition(难民辩护联盟)23 paragraph 2___________24 paragraph 3___________25 paragraph 4___________26 paragraph 5___________A. Preparation for taking a citizenship testB. Citizenship tests in European countiesC. Importance of promoting integrationD. Necessity to know the branches of governmentE. Different On the new citizenship testF . Goal of the new citizenship test来源:考试大网27 The qu~on8inthe new citizenship test are more difficult________.28 Would—beimmigrant8totheUS are expected________.29 In the Dutch citizenship test all would-be immigrants are required________.30 Some people fear that change in the citizenship test will do little________.A to know a lot more about the countryB to watch a videoC to helpimmignt8 accept the new cultureD to marry American citizensE to do low-skill jobsF to answer(。
2021年职称英语理工类A级真题及答案
2021年职称英语理工类A级真题及答案2021年度全国职称英语等级考试理工类（A级）试题一.词汇选项（第1～15 题，每题1 分，共15分）下面共有 15 个句子，每个句子中均有1 个词或短语有底横线，请从每个句子后面所给的4个选项中选择1 个与划线部分意义最相近的词或短语。
答案一律涂在答题卡相应的位置上。
1. It was hard to say why the man deserved such shabby treatment. A) unforgettable B) unbelievable C) unfairD) unthinkable2. The curious look from the strangers around her made her feel uneasy.A) difficult B) worried C) anxious D) unhappy3. It is said that the houses along this street will soon be demolished.A) pulled down B) rebuilt C) renovated D) whitewashed4. The advertising company was surprised by the adverse public reaction to the poster. A) delayed B) quick C) positive D) unfavorable5. He began his talk by giving a concise definition of post-modernism.A) long and detailed B) short and clear C) comprehensive D) professional6. The staff of the company are always courteous and helpful. A) efficient B) respectable C) well-informed C) respectful7. The new job will provide you with invaluable experience. A) simply useless B) really practicalB) very littleD) extremely useful8. The whole idea to build a deluxe hotel here sounds insane to me. A) reasonable B) sensible C) crazyD) unbelievable9. In his two-hour-long lecture he made an exhaustive analysis of the issue. A) extremely thorough B) long and boring C) superficial D) unconvincing*10. We all think that the new device he has proposed is ingenious. A) effective B) cleverC) implausible D) original+11. Reading the job ad, he wondered whether he was eligible to apply for it. A) competitive B) diligent C) qualified D) competent+12 He impressed all his colleagues as a vigorous man in the prime of his career. A) hot-tempered B) healthy C) friendly D) patient13. Not all member States abided by the principle they had agreed on previously. A) adhered to B) abandoned C) applied D) adopted14. Examination papers of the class were marked without bias. A) immediately B) correctly C) fairly D) carefully15. The construction of the railway is said to have been terminated.A) resumed B) put an end to C) suspended D) re-scheduled第2部分：阅读判断(第16～22题，每题1分，共7分)下面的短文后列出了7个句子，请根据短文的内容对每个句子做出判断：如果该句提供的是正确信息，请选择A；如果该句提供的是错误信息，请选择B；如果该句的信息文中没有提及，请选择C。
2014年职称英语(综合类)A级真题试卷(题后含答案及解析)
2014年职称英语（综合类）A级真题试卷(题后含答案及解析)题型有：1. 词汇选项 2. 阅读判断 3. 概括大意与完成句子 4. 阅读理解 5. 补全短文6. 完形填空词汇选项(第1-15题，每题1分，共15分)下面每个句子中均有1个词或短语在括号中，请为每处括号部分的词汇或短语确定1个意义最为接近选项。
1．There was an inclination to treat geography as a less important subject.A．pointB．tendencyC．resultD．finding正确答案：B解析：本句意思：曾经有一种倾向认为地理是一门次要的学科。
inclination 意思为“倾向，趋势”，与tendency(趋势，倾向)意思相近。
point论点，观点，要点；resulf后果，结果；finding调查发现，调查结果。
2．New secretaries came and went with monotonous regularity.A．amazingB．depressingC．predictableD．dull正确答案：D解析：本句意思：秘书不停地更换，令人厌烦。
monotonous意思为“单调乏味的”，与dull(枯燥无味的，令人生厌的)意思相近。
amazing令人惊奇的；depressing令人沮丧的；predictable可预见的。
3．The committee was asked to render a report on the housing situation.A．furnishB．copyC．publishD．summarize正确答案：A解析：本句意思：委员会要提交一份有关住房情况的报告。
render意思为“递交，提交”，与furnish(提供)意思相近。
copy复制，复印；publish出版，发行；summarize总结，概括。
4．The group does not advocate the use of violence.B．regulateC．opposeD．support正确答案：D解析：本句意思：该团体不支持使用暴力。
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北极光(The Northern Lights)太阳是狂暴的，有它自己独特的气候。
太阳太热，其活动又太剧烈，以至于无法控制它自己的大气层。
热量以电粒子流的形式逃离太阳，流向地球，时速高达100万英里。
这些粒子叫等离子体，来自太阳的等离子流叫太阳风。
太阳活动越剧烈太阳风越强烈。
太阳风不断地流向地球，但是不必担心，因为有一个保护性的磁场包围着我们的地球。
使指南针指向北方的相同的磁场也把来自太阳的粒子导向地球的南北两极。
这些受控的粒子被吸附在地球周围的磁场。
当强大的太阳风侵入地球磁场时，首先磁场受到挤压，接着磁场磁力线断开又闭合。
磁场磁力线的断开和闭合产生叫做电子的原子粒子，被截留在磁场，落入地球两极的大气层。
等离子流的电子进入地球，与大气层的气体分子发生碰撞，在天空中产生光芒。
每一种大气层的气体产生不同颜色的光。
氧和氮发红绿光，氮气发蓝紫光。
当这些不同的颜色在夜空中闪烁跳跃时．就形成了北极光和南极光。
，看极光是很有意思也很令人振奋的。
然而通常只有在极北面，像阿拉斯加州和加拿大等地方才能看到。
横过天空的极光移动速度通常很慢，用肉眼就能很轻易地观测到.而他们还能跳动、闪烁甚至像波一样流动。
在太阳风暴达到最高峰的期间，明亮的北极光甚至在位于极南面的佛罗里达州乃至墨西哥都能看到。
极光似乎很接近地面，但是最靠近地面的极光离地面也有100公里，比云层都高，飞机也无法到达。
一条典型的极光带有数千公里长，几百公里高，但是只有几百米厚。
希望你在有生之年至少去极北面像北极圈等地区旅游一次，看看北极光。
此次经历必将使你终生难忘。
Biodiesel 生物柴油泰国人Yuthachai发明了一种取自于植物油的生物柴油，这是一种可取代昂贵的进口柴油的本地产的燃料。
由于生物柴油的原料为价格正在下跌的椰油和棕榈油，并且生物柴油还降低了国家对价格日趋昂贵的海外石油资源的依赖，所以生物柴油赢得了泰国政府的支持。
56岁的Yuthachai为其椰油燃料生产过程申请了专利。
18年前，他利用自己在种植园工作中和维修农场器具时所获得的知识发明了生物柴油。
目前，他在服务站销售自己发明的燃料，但却顶住了外国石油公司的诱惑，拒绝出售生产生物柴油的专利。
他决心要控制住生物柴油的生产配方，使泰国农民能利用他的配方，自行生产生物柴油。
生物柴油共有数种，但Yuthachai的生物柴油是最基本的一种，原料为20:1的天然椰油和煤油。
生产这种生物柴油所需技术简单且便宜，可在未经改造的运转缓慢的发动机中可使用。
尽管公众对Yuthachai发明的燃料颇感兴趣，但政府却抱以谨慎态度。
由于目前还缺乏植物油燃料方面的管理体制，所以普通的车辆还不能使用Yuthachai的燃料。
但是农民和船主却非常热情，每天要购买70万升的产自天然植物油的生物柴油作为农场机器和船只的燃料。
需求量在节节攀升：一升生物柴油比普通柴油要便宜4～6美分。
根据一些科学家的观点，产自于天然椰油的生物柴油在发动机上不如普通柴油好用，并且脂肪酸沉积物最终会对发动机造成损害。
不久我们就会拥有一种解决方法，用废烹调油生产生物柴油。
泰国正在建立一个提炼废烹调油的实验性生物柴油制造厂，可将曼谷每天产生的6万公吨废烹调油提炼成生物柴油。
其他亚洲国家也在研究生物柴油的制造——其中马来西亚和菲律宾已进行了20年的研究，但是，泰国是用政府政策支持生物柴油商业化的第一个国家。
这种发展势头似乎还要继续下去。
泰国政府正在与一家美国公司进行洽谈，以期在泰国建立一家更加先进的生物柴油制造厂。
在该制造厂投人运行之前，本地产生物柴油将会有助于改善苦苦挣扎的泰国人的命运。
结果。
观测火星上的尘粒（Image Martian Dust Particles）美国国家航空航天局的凤凰号火星登陆器通过其携带的望远镜观测到了迄今为止第一幅火星微粒的照片。
这次微粒的图象比以往任何拍摄地球以外的物质使用的放大率都要高。
据测成原形的微粒直径只有一千分尺，也就是一百万分之一米。
“此次观测需要清晰度最高的望远镜，同时要专门设计能够握持火星尘粒的设备。
”Pike说到，他是伦敦帝国学院凤凰号科学小组的成员之一。
“我们过去一直认为观察体积如此小的微粒是具有很高的挑战性的”。
这次用于观测微粒的设备叫做原子力望远镜，它能够通过位于弹簧末端的尖端来扫描这些微粒并在三维空间中绘制下它们的形状。
这种望远镜能够以小到l00纳米来呈现出这些微粒。
而且这不会是凤凰号扫描的最后的尘粒，科学家将会收集更多的火星微粒进行扫描。
“这次成功以后，我们正在努力创建一座火星尘粒图像陈列馆。
”Pike说到。
火星上到处都存在着尘粒，这些尘粒覆盖着火星表面使其呈现出锈迹斑斑的红色。
这些尘粒把火星的天空染成了粉色而且经常会引起覆盖行星的尘暴。
而超小的尘粒又是连接大气层中的空气与火星中的土壤的媒介物，所以研究者称火星尘粒对于了解火星环境是极端重要的。
这次耗资420万美圆的凤凰号任务将会分析火星北极范围内的尘粒和地表下的冰层，目的是发现火星上过去是否有居住性的可能性。
从原子力望远镜里观测到的尘粒由机械手从“白雷沟”挖到的样本的一部分而后在七月份的早期被传送到了凤凰号的望远镜上。
口罩也许无法预防感冒如果一场超级流感爆发，口罩也许不能保护你。
在下一次世界性的流感爆发期间，广泛使用口罩是否有用还是个问题，科学家正认真研究该题，但至今还没有任何结果。
然而，为了以防万一，政府建议人们在某些情况下还是应当考虑配戴口罩。
但问题是，当政府为下一次流感流行做准备时，公众仍心存疑问。
所以美国疾病控制和预防中心提出指导原则，“我们不希望人们到处戴着口罩，”他们说，总体上是建议要避免到有流感病毒的场合去。
”在无法避免的情况下，指导原则提出，在以下三种情况下应考虑佩戴一个简易的外科手术口罩：第一，你很健康但要到一个人群拥挤的地方；第二，已经生病了但仍要与健康的人接触，如家庭成员要来看你的病情；第三，与你居住在一起的人已经感冒了，也许你已经处在传染的早期阶段，但你仍需外出。
当易变异的感冒病毒出现人们从未遇到过的新种类时，全国性的流行性感冒就会爆发。
如果亚洲的禽流感开始在人与人之间传播，就可能会引起一场这样的大流行性疾病，虽然人们的忧虑不断升级，但科学家仍无法预测这样的大爆发什么时候会出现。
在流感期间，你应当学会自我保护。
避免到人多的地方去，远离流感病人，除非你必须照顾病人。
为什么不把口罩放入自我保护的意见中呢?口罩能把咳嗽或是打喷嚏飞出的含有病毒的飞沫拦截住。
简易的外科手术口罩只能过滤大的飞沫。
此外，美国疾病控制和预防中心担心口罩可能会制造出一种虚假的安全感。
也许原本会呆在家里的人会戴上一个不合适的口罩跑去坐地铁。
流感不仅仅是通过空气传染。
有些人打喷嚏时会用手遮挡，带有病毒的手会接触到门把手或是地铁里的扶手。
如果你碰到这些东西，然后把带有流感病毒的手接触到嘴或者鼻子，你就有可能被传染。
戴口罩时。
脸在口罩下容易出汗，当你去擦汗时，病毒就直接被带到了鼻子里。
这些问题就是口罩带给他们的使用者的。
人们是否应该使用口罩仍然是个问题。
公众还要耐心地等待科学家的研究结果。
神奇的io私人数字笔仔细看看由Logitech公司发明的i.私人数字笔吧:这是一种神奇的笔,可以将你写的所有东西储存下来并转换到计算机上,而你在使用这种数字笔时却不必携带手持设备.Logitech技术的工作原理如下:这种笔使用一种普通的圆珠笔墨水,和平常一样写字.但是当你写字时,笔内的一个极小的摄像头也在以每秒钟100张的速度对你所写的内容进行快速拍搔,通过印在纸上的小点块拼出你所写的内容.然后,无论你是记笔记还是画复杂图表,所有的信息——基本上都是笔在纸上的移动——都将以数字形式存储于笔中.你可在笔的存储器中存储多达40页的资料.而对你来说,你只不过是在使用一只普通的笔而已.只有当你将笔插入与PC机连接的笔座中时,有趣的事才真正开始了,你的PC机的专用软件会估算出你所做之事,并下载你最新写下的所有文件.根据你是否在专用记事本的一些特定框里打对号,这种笔还可辨别出文档是电子邮件,"待执行"任务还是耍插人字处理文档的田表.文档下载后,你就可以查看,打印或转换为其他形式.io私人数字笔可妥善又简单地解决手写笔记的存储,共事和检索问题,也可处理图表,图片及其他非文本资料.你不必携带电脑,你只需要章出笔和专门用纸就能开始工作了.这是一种很了不起的产品,因为你的工作不会固之产生任何麻烦——你不必携带显示屏,也不必携带任何附件.它非常轻便,如果你需要的话,也可以当普通笔来用,而这种专用记事本看起来摸起来都很像普通记事本.有些人会很好奇,不明白为什么你在用雪茄写字,这是唯一看起来令人费解的地方.io私人数字笔在其他方面也很有潜力.例如,联邦快遵公司正引进一种数字笔,从而用户可用手填写表格,而无须再费力劳神地打进机器中.如果数据为数宇型,几乎所有事情都可由这种笔来完成——例如将数据通过无线方式或手机传输到中心计算机上.医生可将处方直接转到药房,减少了欺诈行为的发生.警察可将报告发回警察局,减少了文书工作.磁悬浮列车(Maglev Trains)一些国家正在使用强有力的电磁体发展高速列车，这种列车叫做磁悬浮列车。
Maglev是磁悬浮的缩略词，它意味着这些列车漂浮在导向槽上，导向槽是使用磁铁的基本原理来替换原来的钢轮子和钢轨道的列车。
如果您曾经玩过磁铁，您知道异极相吸，同极相斥的道理。
这是电磁式推进背后的基本原理。
电磁体与其他磁铁在吸引金属物品方面是一样的，但是电磁力是暂时的。
您能通过铜丝连接一节5号电池的正负极很容易地自己创造出一个小的电磁体。
这就创造了一个小磁场。
如果您从电池分开导线的任意一个末端，磁场就消失。
•这个导线和电池实验创造的磁场是磁悬浮列车系统背后的简单想法。
这个系统有三个成分：一个大电能来源、金属卷排行列成导向槽或轨道，和附着列车下面的大的导电磁体。
磁悬浮列车和传统列车之间的一个很大的大区别是磁悬浮列车没有发动机—一至少不是沿着轨道拉动典型的火车车厢的那种发动机。
磁悬浮列车的发动机相当不显眼。
代替矿物燃料的使用，由嵌入导向壁内的电磁线圈产生的磁场加上轨道，一起推动火车前进。
导向槽是沿着轨道延伸的带磁性的线圈。
它排斥在列车的车盘上的大磁铁，允许列车在导向槽之上l-10cm之间悬浮。
一旦列车被悬浮，就把力量供给在导向槽墙体之内的线卷来创造出一个单独的磁场系统，沿着导向槽推拉列车。
在导向槽墙体内供给线圈的电流不断交替改变被磁化的线卷的极性。
在极性上的变化造成了列车前面的磁场向前拉动列车，而在列车后面的磁场增加更多向前推力。
磁悬浮列车漂浮在气垫上来减少摩擦。
这种缺乏摩擦(的状态)让这些列车超过500 kph的速度，(这个速度)是地面交通工具史无前例的速度，或者是最快速的传统列车两倍的速度。