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1、2009年职称英语等级考试试题及答案解析 理工类(B级)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个词或短语划有底横线，请为每处划线部分确定1个意义最为接近的选项。1 Would you please call my husband as soon as possible? A phone B visit C consult D invite2 We had along conversation about herparents A speech B question C debate D taIk3 The chairman proposed that we
2、stop the meeting A stated B announced C suggested D demanded4 Obviouslythese people can be relied on in a crisis. A depended on B lived on C believed in D joined in5 There is always excitement at the Olympic Games when an athletebreaks a record A maintains B beats C matches D tries6 All the pupils s
3、eem to be very cheerful. A healthy B happyC naughty D busy7 The traditional paintings are exhibited on the second floor A displayed B laid C kept D stored8 She stood there，shaking with fury. A misery B laughter C cry D anger9 Mary evidently is the most diligent student among US A intelligent B beaut
4、iful C hardworking D talkative10 Persistent attempts to interview Garbo were fruitless A Forceful B Reasonable C Fjml D Continuous11 Why cant you stop your eternal complaining? A long B everlasting C temporary D boring12 Hundreds of buildings were wrecked by the eadhquake A danlaged B shaken c falle
5、n D jumped13 These paintings are considered by many to be authentic. A faithful B royal C sincere D genuine14 Many economists have given in to the fatal lure of mathematics A simpicity B attraction C power D rigor15 Ten years after the event, her death still remains a puzzle A mist B fog C secret D
6、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个句于，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。Radiocarbon Dating Nowadays scientists can answer many questions about the past through a techniquecalled radiocarbon(放射性碳)，or carbon-14；dating One key to understanding how and wh
7、y something happened is to discover when it happened Radiocarbon dating was developed in the late 1940s by physicist Willard F. Libby at the University of Chicago An atom of ordinary carbon，called carbon-12，has six protons (质子) and six neutrons (中子) in its nucleus. Carbon-14，or C-14is a radioaclive
8、unstable form of carbon that has two extra neutrons(原子核) it returns to a more stable from of carbon through a process called decay(衰减)This process involves the loss of the extra neutrons and energy from the nucleus In Libbys radiocarbon dating technique，the weak radioactive emissions(放射) from this d
9、ecay process ere counted by instruments such as a radiation detector and counter the 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 believ
10、e since the Earth was formed the amount 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 atoms in the atmosphere is known. Most scientists agree that this radio is useful for dating items ba
11、ck to at least 50.000 years. All life on Earth is made of organic molecules(分子)that contain carbon atoms coming from the atmosphere . So aIl living things have about the same ratio of C-14 atoms to other carbon atoms in their tissues(组织). Once an organism(有机体)dies it stops taking in carbon in any fo
12、rm，and the C-14 already present begins to decayOver time the amount of C-14 in the material decreases，and the ratio of C-14 to other carbon atoms goes down. In terms of radio carbon dating，the fewer C-14 atoms in a sample the older that sample is16 Nowadays many scientists depend 013 radiocarbon for
13、 dating age-old objects A Right B Wrong C Not mentioned17 The radiocarbon dating technique is only about 40 years old A Right B Wrong C Not mentioned18 An atom of ordinary carbon has six protons and eight neutrons A Right B Wrong C Not mentioned19 Radar is used to determine the characteristics of ra
14、diocarbon A Right B Wrong c Not mentioned20 Radiocarbon is reliable in dating an object back to at least 50000 years A Right B Wrong C Not mentioned21 The C-14 in an organism begins to decay when it dies A Right 日Wrong C Not mentioned22 The half-life of C-14 is about 25000 yearsA Right B Wrong C Not
15、 mentioned第3部分：概括大意与完成句子(第2330题，每题1分，共8分)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 an environmental or moral tragedy (悲剧)Chimpanzee extinction may also have profound implications(含意)for the survival of their distant relativeshuman beings2 ln l975 the
