2009的职称英语考试理工类B级真题及答案解析完全版.doc
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1、2009年职称英语考试理工类B级真题及答案第1部分:词汇选项(第115题,每题1分,共15分)下面每个句子中均有1个词或短语划有横线,请为每处划线部分确定1个意义最为接近的选项。1Would you please call my husband as soon as possible?Aphone B visit Cconsult D invite2We had a long conversation about her parents.Aspeech Bquestion Cdebate Dtalk3The chairman proposed that we stop the meeting.
2、Astated B announced Csuggested D demanded4Obviously these people can be relied on in a crisis.Adepended on B lived on Cbelieved in D joined in5There is always excitement at the Olympic Games when an athlete breaks a record.Amaintains B beats Cmatches D tries6All the pupils seem to be very cheerful.A
3、healthy B happy Cnaughty D busy7The traditional paintings are exhibited on the second floor.Adisplayed B laid Ckept D stored8She stood there, shaking with fury.Amisery B laughter Ccry D anger9Mary evidently is the most diligent student among usAintelligent B beautiful Chardworking D talkative10 Pers
4、istent attempts to interview Garbo were fruitless.A Forceful BReasonable C Firm DContinuous11 Why cant you stop your eternal complaining?Along B everlasting Ctemporary D boring12 Hundreds of buildings were wrecked by the earthquake.Adamaged B shaken Cfallen D jumped13 These paintings are considered
5、by many to be authentic.Afaithful B royal Csincere D genuine14 Many economists have given in to the fatal lure of mathematics.Asimplicity B attraction Cpower D rigor15 Ten years after the event, her death still remains a puzzleAmist B fog Csecret D mystery第2部分:阅读判断(第1622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
6、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。 Radiocarbon DatingNowadays scientists can answer many questions about the past through a technique called radiocarbon (放射性碳), or carbon-14, dating. One key to understanding how and by something happened is to discover when it happ
7、ened.Radiocarbon dating was developed in the late 1940s by physicist Willard F. Libby at he University of Chicago. An atom of ordinary carbon, called carbon-12, has six protons(中子) and six neutrons (质子) in its nucleus. Carbon-14, or C-14, is a radioactive, unstable form of carbon that has two extra
8、neutrons (原子核). It returns to a more stable form of carbon through a process called decay (衰减). This process involves the loss of he extra neutrons and energy from the nucleus.In Libbys radiocarbon dating technique, the weak radioactive emissions (放射) from his decay process are counted by instrument
9、s such as a radiation detector and counter. he decay rate is used to determine the proportion of C-14 atoms in the sample being dated.Carbon-14 is produced in the Earths atmosphere when nitrogen (氮)-14, or N-14,interacts with cosmic rays (宇宙射线). Scientists believe since the Earth was formed, the mou
10、nt of nitrogen in the atmosphere has remained constant. Consequently, C-14 formation is thought to occur at a constant rate. Now the ratio of C-14 to other carbon toms in the atmosphere is known. Most scientists agree that this ratio is useful for dating items back to at least 50,000 years.All life
11、on Earth is made of organic molecules (分子) that contain carbon atoms coming from the atmosphere. So all living things have about the same ratio of C-14atoms to other carbon atoms in their tissues (组织). Once an organism (有机体) dies it tops taking in carbon in any form, and the C-14 already present beg
12、ins to decay. Over time the amount of C-14 in the material decreases, and the ratio of C-14 to other carbon toms goes down. In terms of radiocarbon dating, the fewer C-14 atoms in a sample, the older that sample is.16Nowadays many scientists depend on radiocarbon for dating age-old objectsA Right BW
13、rong C Not mentioned17The radiocarbon dating technique is only about 40 years oldA Right BWrong C Not mentioned18An atom of ordinary carbon has six protons and eight neutronsA Right BWrong C Not mentioned19Radar is used to determine the characteristics of radiocarbonA Right BWrong C Not mentioned20R
14、adiocarbon is reliable in dating an object back to at least 50,000 years.A Right BWrong C Not mentioned21The C-14 in an organism begins to decay when it diesA Right BWrong C Not mentioned22The half-life of C-14 is about 25,000 years.A Right BWrong C Not mentioned第3部分:概括大意与完成句子(第2330题,每题1分,共8分)下面的短文后
15、有2项测试任务:(1)第2326题要求从所给的6个选项中为第14段每段1选择个最佳标题;(2)第2730题要求从所给的6个选项中为每个句子确定1个最佳选项。chimpanzees1 Chimpanzees (黑猩猩) will soon be extinct (灭绝). If the present rate of hunting and habitat (栖息地) destruction continues, then within 20 years, there will be no chimpanzees living in the wild. But this is more than
16、 an environmental or moral tragedy (悲剧). Chimpanzee extinction may also have profound implications (含意) for the survival of their distant relatives - human beings.2In 1975 the biologist Marie-Claire King and Allan Wilson discovered that the human and chimpanzee genomes (基因组) match by over 98%. Compa
17、re this to the mouse, used as model for human disease in lab tests, which shares only 60% of its DNA with us. In fact, chimpanzees are far more similar to humans than they are to any other species of monkey. As well as resembling us genetically, chimps are highly intelligent and able to use tools. T
18、hese facts alone should be enough to make protection of chimps an urgent priority (优先). But there is another, more selfish reason to preserve the chimp.3The chimpanzees trump card (王牌) comes in the field of medical research. Chimpanzees are so similar to humans that veterinarians (兽医) often refer to
19、 human medical textbooks when treating them. Yet chimpanzees do show differences in several key areas. In particular, chimps are much more resistant to a number of major diseases. It is this ability that is so interesting.4For example, chimps seem to show a much higher resistance than humans to HIV,
20、 the virus that causes AIDS. Indeed, their use as experimental animals in AIDS research has declined because they are so resistant.5By sequencing the chimp genome and pinpointing (找到) the place where the chimpanzee DNA sequence differs from that of humans, scientists hope to be able to discover whic
21、h part of the genetic code gives chimps their increased resistance to some diseases. This, they hope, will allow them to develop new and more effective treatments for the human forms of these diseases. Such treatments could include the production of new drugs or even the alteration (改变) of the human
22、 genetic sequence. The recently completed human genome sequencing project has shown that such an effort is now well within our reach.23Paragraph 124Paragraph 225Paragraph 326Paragraph 4AGenetic differences between chimps and humansBReasons for HIV resistanceCImplications of chimpanzee extinction for
23、 humansDEffective AIDS treatmentEGenetic similarities between chimps and humansFChimps resistance to HIV27Chimpanzee extinction may affect28There is a difference ofless than 2% between the chimp and29Scientists suspect that genes.PlaY a significant role in protecting chimps from getting30The discove
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