2014年职称英语考试理工类A级试题及答案
第1部分：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。
1 Would you please call my husband as soon as possible？
A visit B phone
C consult D invite
2 We had a long conversation about her parents.
A speechB question
C talk D debate
3 The chairman proposed that we stop the meeting.
A statedB announced
C demanded D suggested
4 Obviously these peoplewww.med126.com can be relied on in a crisis.
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 B maintains
C matches D tries
6 All the pupils seem to be very cheerful.
A happy B healthy
C naughty D busy
7 The traditional paintings are exhibited on the second floor.
A laid B displayed
C kept D stored
8 She stood there， shaking with fury.
A miseryB laughter
C anger D cry
9 Mary evidently is the most diligent student among us
A intelligent B beautiful
C talkative D hardworking
10 Persistent attempts to interview Garbo were fruitless.
A Forceful B Reasonable
C ContinuousD Firm
11 Why can't you stop your eternal complaining？
A everlasting B long
C temporary D boring
12 Hundreds of buildings were wrecked by the earthquake.
A shakenB damaged
C fallenD jumped
13 These paintings are considered by many to be authentic.
A faithful B royal
C genuine D sincere
14 Many economists have given in to the fatal lure of mathematics.
A attractionB simplicity
C power D rigor
15 Ten years after the event， her death still remains a puzzle
A mist B fog
C mystery D secret
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.
Radiocarbon Dating
Nowadays 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 happened.
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 neutrons （原子核)。 It returns to a more stable form of carbon医学全在线www.med126.com through a process called decay （衰减)。 This process involves the loss of he extra neutrons and energy from the nucleus.
In Libby's radiocarbon dating technique， the weak radioactive emissions （放射) from his decay process are counted by instruments 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 Earth's atmosphere when nitrogen （氮)-14， or N-14，
interacts with cosmic rays （宇宙射线)。 Scientists believe since the Earth was formed， the mount 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 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-14www.med126.com
atoms 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 begins 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.
16 Nowadays many scientists depend on radiocarbon for dating age-old objects
A Right B Wrong C Not mentioned
17 The radiocarbon dating technique is only about 40 years old
A Right B Wrong C Not mentioned
18 An atom of ordinary carbon has six protons and eight neutrons
A Right B Wrong C Not mentioned
19 Radar is used to determine the characteristics of radiocarbon
A Right B Wrong C Not mentioned
20 Radiocarbon is reliable in dating an object back to at least 50，000 years.
A Right B Wrong C Not mentioned
21 The C-14 in an organism begins to decay when it dies
A Right B Wrong C Not mentioned
22 The half-life of C-14 is about 25，000 years.
A Right B Wrong C Not mentioned
更多职称英语资格考试信息：
2014年职称英语考试成绩查询时间
