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1、全国职称英语等级考试全真模拟题理工类B级资料仅供参考全国职称英语等级考试全真模拟题 理工类B级（一）第一部分：词汇选项（第115题，每题1分，共15分） 下面共有15个句子，每个句子中均有1个词或短语划有底横线，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. All living organisms, regardless of their unique identity, have certain biological, chemical, and physical characteristics in common. A） a
2、s a result of B） considering C） on purpose D） whatever2. The most pressing problem any economic system faces is how to use its scarce resources.A） puzzling B） difficult C）terrifying D） urgent3. The Klondike was the scene of one of the biggest gold rushes the world has ever known.A）location B）view C）
3、 event D） landscape4. Of the reptile groups, the snake group was the final one to appear.A） last B）best C） ugliest D）longest5. Colleges and universities usually give diplomas or certificates to students who complete course requirements satisfactorily.A） responsibly B） acceptably C） patiently D）respe
4、ctfully6. A will is a document written to ensure that the wishes of the deceased are realized.A） fulfilled B） affiliated C） advocated D） received7. She has been the subject of massive media coverage.A） extensive B） negative C） responsive D） explosive8. The conference explored the possibility of clos
5、er trade links.A） rejected B） investigated C） proposed D） postponed9. Experts generally agree that diet has an important bearing on ones health.A） result B） factor C） cause D） influence10. I expect that she will be able to cater for your particular needs.A） meet B） reach C）provide D） fill11. John is
6、 collaborating with Mary in writing a book.A） cooperating B） merging C） combining D） associating12. Mary lost control of her car and collided with a tree.A） came across B） ran into C） met D） knocked13. Mary was compelled to take in washing to help support her family.A） pleaded B） appealed C） forced
7、D）instructed14. The child couldnt comprehend the advanced textbook.A） interpret B） read C） understand D） translate15. I warned him to keep the matter confidential.A） private B） safe C） personal D） secret第二部分：阅读判断（第1622题，每题1分，共7分）阅读下面这篇短文，短文后列出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，请在答题卡上把A涂黑；如果该句提供的是错误
8、信息，请在答题卡上把B涂黑；如果该句的信息在文章中没有提及，请在答题卡上把C涂黑。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 why something happened is to discover when it happened Radiocarbon dating was devel
9、opedinthelatel940s 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(原子核)Carbon-14，or C-14，is a radioactive unstable form of carbon that has two extra neutrons .It returns to e more stable form
10、 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 decay process are counted by instruments such as a radiation detector and counterThe decay
11、 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(氨)-14or N-14，interacts with cosmic rays(宇宙射线)Scientists believe since the Earth was formed，the amount of nitrogen in the atmosphere has remained constant Co
12、nsequently,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 ratio is useful for dating items back to at least 50000 yearsAll life on Earth is made of organic molecules(分子)that contain carbon a
13、toms coming from the atmosphere So all 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 form，and the C-14 already present begins to decay Over time the amount of C-14 in the material decreases a
14、nd the ratio of C-14 to other carbon atoms goes down In terms of radiocarbon datingthe fewer C-14 atoms in a sample，the older that sample is.16. Nowadays many scientists depend on radiocarbon for dating age-old objectsA RightB WrongC Not mentioned17. The radiocarbon dating technique is only about 40
15、 years oldA RightB WrongC Not mentioned18. An atom of ordinary carbon has six protons and eight neutronsA RightB WrongC Not mentioned19.Radar is used to determine the characteristics of radiocarbonA RightB WrongC Not mentioned20.Radiocarbon is reliable in dating an object back to at least 50,000 yearsA RightB WrongC Not mentioned21. When an organism diesthe C-14 in it begins to decayA RightB WrongC Not mentioned22. The half-life of C-14 is about 25,000 yearsA RightB WrongC Not mentioned第三部分：概括大意与完成句子（第2330题，每题1分，共8分）阅读下面这篇短文
