职称英语考试真题模拟理工类京华网校.doc

职称英语考试真题理工类京华网校

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全国职称英语等级考试理工类（B级）（京华网校提供）

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　speech B question

C　talk D debate

3　The chairman proposed that we stop the meeting.

A　stated B announced

C　demanded D suggested

4　Obviously these people 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　misery B 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 Continuous D　 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　shaken B damaged

C　fallen D 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　attraction B 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 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-14

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

第3部分：概括大意与完成句子（第23～30题，每题1分，共8分）

下面的短文后有2项测试任务：（1）第23～26题要求从所给的6个选项中为第1～4段每段1选择个最佳标题；（2）第27～30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。

Chimpanzees

1　　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 relatives - human beings.

2　　In 1975 the biologist Marie-Claire King and Allan Wilson discovered that the human and chimpanzee genomes （基因组） match by over 98%. Compare 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. These 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.

3　　The 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 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.

4　　For example， chimps seem to show a much higher resistance than humans to HIV， the virus that causes AIDS. Indeed， their use as experimental animals in AIDS research has declined because they are so resistant.

5　　By 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 which 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 genetic sequence. The recently completed human genome sequencing project has shown that such an effort is now well within our reach.

23　Paragraph 1____

24　Paragraph 2____

25　Paragraph 3____

26　Paragraph 4____

A　Reasons for HIV resistance

B　Implications of chimpanzee extinction for humans

C　Effective AIDS treatment

D　Genetic similarities between chimps and humans

E　Chimps' resistance to HIV

F　Genetic differences between chimps and humans

27　Chimpanzee extinction may affect____

28　There is a difference of　less than 2% between the chimp and____

29　Scientists suspect that genes. Play a significant role in protecting chimps from getting____

30　The discovery of the genetic code of chimps will be helpful to____

A　some human disease treatments

B　some diseases

C　human survival

D　human genomes

E　key areas

F　healthier lifestyle

第4部分：阅读理解（第31～45题，每题3分，共45分）

下面有3篇短文，每篇短文后有5道题。请根据短文内容，为每题确定1个最佳选项。

第一篇

Water

The second most important constituent （构成成份） of the biosphere （生物圈） is liquid water. This can only exist in a very narrow range of temperatures， since water freezes at 0℃ and boils at 100℃。 Life as we know it would only be possible on the surface of a planet which had temperatures somewhere within this narrow range.

The earth's supply of water probably remains fairly constant in quantity. The total quantity of water is not known very accurately， but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers. Most of it is in the form of the salt water of the oceans - about 97 per cent. The rest

is fresh， but three-quarters of this is in the form of ice at the Poles and on mountains， and cannot be used by living systems until melted. Of the remaining fractional which is somewhat less than one per cent of the whole， there is 10-20 times as much stored underground water as there is actually on the surface. There is also a tiny， but extremely important fraction of the water supply which is present as water vapor in the atmosphere.

Water vapor in the atmosphere is the channel through which the whole water

circulation （循环） of the biosphere has to pass. Water evaporated （蒸发） from the surface of the oceans， from lakes and rivers and from moist （潮湿的） earth is added to it. From it the water comes out again as rain or snow， falling on either the sea or the land. There is， as might be expected， a more intensive evaporation per unit area over the sea and oceans than over the land， but there is more rainfall over the land than over the oceans， and the balance is restored by the runoff from the land in the form of rivers.

31　Liquid water only exists

A　in the center of the earth.

B　on the surface of our planet.

C　in a very narrow range of temperatures.

D　in the coastal areas of the earth.

32　The total quantity of water on Earth

A　remains almost unchanged.

B　has greatly increased in recent years.

C　is decreasing constantly.

D　is affected by global warming.

33　Most of the fresh water on Earth

A　is stored underground.

B　is in the form of ice at the Poles and on mountains.

C　is found in rivers and lakes.

D　comes from the rain.

34　The word “fraction” in the second paragraph means

A　a very small amount.

B　a large area.

C　an important system.

D　a major source of information

35　There is more of rainfall

A　over the mountains than over the rivers.

B　over the rivers than over the mountains

C　over the oceans than over the land.

D　over the land than over the oceans.

第二篇

Mind-reading Machine

A team of researchers in California has developed a way to predict what kinds of objects people are looking at by scanning （扫描） what's happening in their brains.

When you look at something， your eyes send a signal about that object to your brain. Different regions of the brain process the information your eyes send. Cells in your brain called neurons （神经元） are responsible for this processing.

The fMRI （functional Magnetic Resonance Imaging） （功能性磁振造影） brain scans could generally match electrical activity in the brain to the basic shape of a picture that someone was looking at.

Like cells anywhere else in your body， active neurons use oxygen. Blood brings oxygen to the neurons， and the more active a neuron is， the more oxygen it will consume. The more active a region of the brain， the more active its neurons， and in turn， the more blood will travel to that region. And by using fMRI， scientists can visualize （使…显现） which parts of the brain receive more oxygen-rich blood - and therefore， which parts are working to process information.

An fMRI machine is a device that scans the brain and measures changes in blood flow to the brain. The technology shows researchers how brain activity changes when a person thinks， looks at something， or carries out an activity like speaking or reading. By highlighting the areas of the brain at work when a person looks at different images， fMRI may help scientists determine specific patterns of brain activity associated with different kinds of images.

The California researchers tested brain activity by having two volunteers view hundreds of pictures of everyday objects， like people， animals， and fruits. The scientists used an fMRI machine to record the volunteers' brain activity with each photograph they looked at. Different objects caused different regions of the volunteers' brains to light up on the scan， indicating activity. The scientists used this information to build a model to predict how the brain might respond to any image the eyes see.

In a second test， the scientists asked the volunteers to look at 120 new pictures. Like before， their brains were scanned every time they looked at a new image. This time， the scientists used their model to match the fMRI scans to the image. For example， if a scan in the second test showed the same pattern of brain activity that was strongly related to pictures of apples in the first test， their model would have predicted the volunteers were looking at apples.

36　What is responsible for processing the information sent by your eyes？

A　The magnetic system in the brain.

B　The central part of the heart.

C　Oxygen-rich blood.

D　Neurons in the brain.

37　The function of an fMRI machine is

A　to show how neutrons take in oxygen-rich blood.

B　to measure how dense the blood is in the brain.

C　to record how much oxygen the brain consumes.

D　to identify which parts of the brain are processing information

38　The expression “highlighting the areas of the brain at work' in paragraph 5 means

A　giving light to the parts of the brain that are processing information.

B　marking the parts of the brain that are processing information.

C　putting the parts of the brain to work.

D　preventing the parts of the brain from working.

39　The researchers experimented on

A　animals and objects.

B　fMRI machines.

C　two volunteers.

D　thousands of pictures.

40　Which of the following can best replace the title of the passage？

A　Recent Development in Science and Technology.

B　Your Thoughts Can Be Scanned.

C　A Technological Dream.

D　An Intelligent Robot.

第三篇

Youth Emancipation in Spain

The Spanish Governm