2009年职称英语理工类B级真题

考试结果--VERS维普考试资源系统页码，1/20

深色：已答题 浅色：未答题职称英语理工类B级真题2009年

(总分232, 考试时间90分钟)

第1部分：词汇选项

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 visit

C consultB phone D invite

2. We bad a long conversation about her parents.

A speech

C talkB question D debate

3. The chairman proposed that we stop the meeting.

A stated C demanded B announced D suggested4. Obviously these people can be relied on in a crisis.

考试结果--VERS维普考试资源系统页码，2/20

A lived on B depended on

C believed in D joined in

5. There is always excitement at the olympic Games when an athlete breaks a record.

A beats C matches B maintains D tries

6. All the pupils seem to be very cheerful.

A happy C naughty B healthy D busy7. The traditional paintings are exhibited on the second floor.

A laid C kept B displayed D stored[解析] 此句为被动语态，划线词为动词的过去分词，意为“展览，陈列”，与B项意思相

同，又如：The young woman proudly displayed herfurs．那个年轻女人骄傲地炫耀她的皮衣。A项原形lay意为“放置；下(蛋)，产(卵)”，例：He laid his

考试结果--VERS维普考试资源系统页码，3/20

8. She stood there, shaking with fury.

A mystery C anger B laughter D cry

9. Mary evidently is the most diligent student among us.

A intelligent

C talkativeB beautiful D hardworking

10. Persistent attempts to interview Garbo were fruitless.

A Forceful

C ContinuousB Reasonable D Firm11. Why can't you stop your eternal complaining?

A long

C temporaryB everlasting D boring

考试结果--VERS维普考试资源系统页码，4/20

12. Hundreds of buildings were wrecked by the earthquake.

A damaged C fallen B shaken D jumped

13. These paintings are considered by many to be authentic.

A faithf1 C sincere B royal D genuine

14. Many economists have given in to the fatal lure of mathematics.A simplicity B attraction

D rigorC power15. Ten years after the event,her death still remains a puzzle.

考试结果--VERS维普考试资源系统页码，5/20

A mist

C secretB fog D mystery第2部分：阅读判断

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

technique called radiocarbon (放射), or carbon-14, dating. One key to

understanding how and why 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(原子核).

Carbon-14,or C-14,is a radioactive,unstable form of carbon that has two extra neutrons. It returns to a more stable form of carbon through a process called decay(衰减). This process involves the loss of the extra neutrons and energy from the nucleus.

In Libby's radiocarbon dating technique, the weak radioactive emissions (放射)from this decay process are 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 Earth's atmosphere when nitrogen(氮)-14,or N-14,interacts with cosmie rays(宇宙射线). Scientists believe 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 ratio is useful for dating items back to at least 50,000 years.

All life on Earth is made of organic molecules(分子)that contain carbon

atoms coming from the atraosphere. 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 ,resent begins to decay. Over 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 radiocarbon dating,the fewer C-14 atoms in a sample,the older that sample is.

16. Nowadays many scientists depend on radiocarbon for dating age-

考试结果--VERS维普考试资源系统页码，6/20old objects.

A Right

B Wrong

C Not mentioned

该题您未回答:х 该问题分值: 1

答案:A

[解析] 关键词为radiocarbon和datingage-old lbject(测定古老物件产生的年

代)。依据此关键词，可在文中第一段找到相关叙述：through a technique called radiocarbOn，or carbon-14，da“ng(通过一种叫做放射，性碳定年法，或叫碳14

年法)，由此可以作为判断的依据，故此题为“正确”的。

17. The radiocarbon dating technique is only about 40 years old.

A Right

B

Wrong

C Not mentioned

该题您未回答:х 该问题分值: 1

答案:B

[解析] 关键词为40 years old。依据此关键词，可在文章第二段找到相关语句：

radiocarbon dating was devel oped in the late 1940s(放射性碳测定法起源于20世纪40年代)，距今已有近70年历史，故此题为“错误”的。

18. An atom of ordinary carbon has six protons and eight neutrons. A Right

B

Wrong

C Not mentioned

该题您未回答:х 该问题分值: 1

答案:B

[解析] 关键词为six protons(6个质子)和eight neutrons(8个中子)。依据此关键

词，可在文章第二段找到才目关叙述：an atom of ordinary carbon，

calledcarbon-12，has six protons and six neutrons(普通碳原子-碳12，有6个质子和6个中子)，该句和判断句句意相反，故此题为 …… 此处隐藏：4692字，全部文档内容请下载后查看。喜欢就下载吧 ……