职称英语理工类B级-49及答案解析.doc

1、职称英语理工类 B 级-49 及答案解析(总分：100.00，做题时间：90 分钟)一、B第 1 部分：词汇选项/B(总题数：15，分数：15.00)1.These are their Umotives/U for doing it. A.reasons B.excuses C.answers D.plans（分数：1.00）A.B.C.D.2.The river Uwidens/U considerably as it begins to turn west. A.twists B.stretches C.broadens D.bends（分数：1.00）A.B.C.D.3.Henry ca

2、nnot resist the Ulure/U of drugs. A.abuse B.flavor C.temptation D.consumption（分数：1.00）A.B.C.D.4.These programmes are of Uimmense/U value to old people. A.natural B.fatal C.tiny D.enormous（分数：1.00）A.B.C.D.5.A great deal has been done to Uremedy/U the situation. A.maintain B.improve C.assess D.protect

3、（分数：1.00）A.B.C.D.6.John is Ucollaborating/U with Mary in writing an article. A.cooperating B.competing C.combining D.arguing（分数：1.00）A.B.C.D.7.He is determined to Uconsolidate/U his power. A.strengthen B.control C.abandon D.exercise（分数：1.00）A.B.C.D.8.Many scientists have been Uprobing/U psychologica

4、l problems. A.solving B.exploring C.settling D.handling（分数：1.00）A.B.C.D.9.Hearing problems may be Ualleviated/U by changes in diet and exercise habits. A.removed B.cured C.worsened D.relieved（分数：1.00）A.B.C.D.10.And the cars are tested for Udefects/U before leaving the factory. A.functions B.faults C

5、.motions D.parts（分数：1.00）A.B.C.D.11.The food is Uinsufficient/U for three people. A.instant B.infinite C.inexpensive D.inadequate（分数：1.00）A.B.C.D.12.Thousands of people Uperished/U in the storm. A.died B.suffered C.floated D.scattered（分数：1.00）A.B.C.D.13.But Uin the end/U he approved of our proposal.

6、 A.undoubtedly B.certainly C.ultimately D.necessarily（分数：1.00）A.B.C.D.14.For young children, getting dressed is a Ucomplicated/U business. A.strange B.complex C.personal D.funny（分数：1.00）A.B.C.D.15.In Britain and many other countries Uappraisal/U is now a tool of management. A.evaluation B.efficiency

7、 C.production D.publicity（分数：1.00）A.B.C.D.二、B第 2 部分：阅读判断/B(总题数：1，分数：7.00)Mother Nature Shows Her StrengthTornadoes (龙卷风) and heavy thunderstorms moved across the Great Lakes and into Trumbull County on Saturday evening. The storms were dramatic and dangerous.George Snyder was driving the fire truck

8、down Route 88 when he first noticed that a funnel (漏斗状的) cloud was behind him. “I stopped the truck and watched the funnel cloud. It was about 100 feet off the ground and I saw it go up and down for a while. It was moving toward Bradley Road and then suddenly it disappeared.“ Snyder said.Snyder only

9、 saw one of the funnel clouds that passed through northeastern Ohio on Saturday. In Trumbull County, a tornado turned trees onto their sides. Some trees feel onto houses and Cars. Other trees fell into telephone and electrical wires as they went down.Amanda Symcheck was having a party when the storm

10、 began. “I knew something was wrong,“ she said. “I saw the sky go green and pink (粉红色的). Then it sounded like a train rushing toward the house. I started crying and told everyone to go to the basement for protection.“The tornado caused a lot of damage to cars and houses in the area. It will take a l

11、ong time and much money to repair everything. There was also serious water damage from the thunderstorms. The heavy rains and high wind caused the power to go out in many homes.The storms caused serious flooding in areas near the river. More than four inches of rain fell in parts of Trumbull County.

12、 The river was so hight that the water ran into streets and houses. Many streets had to be closed to cars and trucks because of the high water. This made it difficult for fire trucks, police cars, and other rescue vehicles to help people who were in trouble.Many people who live near the river had to

13、 leave their homes for their own safety. Some people reported five feet of water in their homes. Local and state officials opened emergency shelters for the people who were evacuated (撤走). The Red Cross served meals to them. “This was a really intense storm.“ said Snyder. People were afraid. MotherN

14、ature call be fierce. We were lucky this time. No one was killed.“（分数：7.00）(1).The weather was nice in Trumbull County on Saturday evening. A.Right B.Wrong C.Not mentioned（分数：1.00）A.B.C.D.(2).George Snyder was a firefighter. A.Right B.Wrong C.Not mentioned（分数：1.00）A.B.C.D.(3).Amanda Symcheck was hav

15、ing a party in the basement when the storm began. A.Right B.Wrong C.Not mentioned（分数：1.00）A.B.C.D.(4).Power supply system was not damaged during the stomay. A.Right B.Wrong C.Not mentioned（分数：1.00）A.B.C.D.(5).There had not been such a severe storm in Trumbull County for a hundred years. A.Right B.Wr

16、ong C.Not mentioned（分数：1.00）A.B.C.D.(6).Rescue vehicles had a hard time getting to people. A.Right B.Wrong C.Not mentioned（分数：1.00）A.B.C.D.(7).Several people were missing during the storm. A.Right B.Wrong C.Not mentioned（分数：1.00）A.B.C.D.三、B第 3 部分：概括大意与完成句子(总题数：1，分数：8.00)The Tiniest Electric Motor in

17、 the World1. Scientists recently made public the tiniest electric motor ever built. You could stuff hundreds of them into the period at the end of this sentence. One day a similar engine might power a tiny mechanical doctor that would travel through your body to remove your disease.2. The motor work

18、s by shuffling atoms between two molten metal droplets (小滴) in a carbon nanotube. One droplet is even smaller than the other. When a small electric current is applied to the droplets, atoms slowly get out of the larger droplet and join the smaller one. The small droplet growsbut never gets as big as

19、 the other dropletand eventually bumps into the large droplet. As they touch, the large droplet rapidly sops up the atoms it had previously lost. This quick shift in energy produces a power stroke.3. The technique exploits the fact that surface tensionthe tendency of atoms or molecules to resist sep

20、aratingbecomes more important at small scales. Surface tension is the same thing that allows some insects to walk on water.4. Although the amount of energy produced is small20 microwattsit is quite impressive in relation to the tiny scale of the motor. The whole setup is less than 200 nanometers on

21、a side, or hundreds of times smaller than the width of a human hair. If it could be scaled up to the size of an automobile engine, it would be 100 million times more powerful than a Toyota Camrys 225 horsepower V6 engine.5. In 1988, Professor Richard Muller and colleagues made the first operating mi

22、crometer, which was 100 microns across, or about the thickness of a human hair. In 2003, Zettls group created the first nanoscale motor. In 2006, they built a nanoconveyor, which moves tiny particles along like cars in a factory.6. Nanotechnology engineers try to mimic nature, building things atom b

23、y atom. Among other things, nanomotors could be used in optical circuits to redirect light, a process called optical switching. Futurists envision a day when nanomachines, powered by nanomotors, travel inside your body to find disease and repair damaged cells.AAn Introduction of a Toyotas 225 Horsep

24、ower V6 EngineBA Description of the Nanomotor in Terms of Power and SizeCSurface TensionDPrevious Inventions of Nanoscale ProductsEThe Working Principle of the NanomotorFPossible Fields of Application in the Future（分数：8.00）(1).Paragraph 2 _（分数：1.00）填空项 1:_(2).Paragraph 4 _（分数：1.00）填空项 1:_(3).Paragra

25、ph 5 _（分数：1.00）填空项 1:_(4).Paragraph 6 _（分数：1.00）填空项 1:_(5).Aremove disease Bresist separating Cshuffle between two molten metal droplets Dpower nanornachines Esop up molecules from the large droplet Ftransport nanoscale objects Doctors envision that the nanomotor would travel through human bodies to

26、 _.（分数：1.00）填空项 1:_(6).Surface tension means the tendency of atoms or molecules to _.（分数：1.00）填空项 1:_(7).Nanoconveyors could be used to _.（分数：1.00）填空项 1:_(8).Applying a small electric current causes atoms to _.（分数：1.00）填空项 1:_四、B第 4 部分：阅读理解/B(总题数：0，分数：0.00)五、B第一篇/B(总题数：1，分数：15.00)U.S. Blacks Hard Hi

27、t by CancerDeath rates for cancer are falling for all Americans. But black Americans are still more likely to die of cancer than whites, the American Cancer Society said Monday.In a special report on cancer and blacks, the organization said blacks are usually diagnosed with cancer later than whites,

28、 and they are more likely to die of the disease.This could be because of unequal (不平等的) access to medical Care. Because blacks are more likely to have other diseases as well, and perhaps because of differences in the biology (生物学) of the cancer itself, the report added.“In general, black Americans h

29、ave less hope of surviving five years after diagnosis than whites for all cancer sites and all stages of diagnosis.“ the report said.“In describing cancer statistics for black Americans, this report recognizes that many of the differences associated with race may be caused by unfair social and econo

30、mic differences and unequal access to medical care.“The cancer society said blacks should be encouraged to get check-ups (体格检查) earlier, when cancer is more treatable. And it said more research is needed to see if biological differences play a role.“The new statistics emphasize the continuing import

31、ance of wiping out these unfair social differences through public policy and education efforts,“ the organization said in a statement.But it also noted a drop in cancer death rates.“Cancer death rates in both sexes for all sites combined have dropped greatly among black Americans since 1992, as have

32、 incidence rates (发生率),“ said the report.（分数：15.00）(1).Black Americans are more likely to die of cancer than _. A.people in other countries. B.white Americans. C.all other Americans. D.their ancestors.（分数：3.00）A.B.C.D.(2).Which may NOT be a reason for higher cancer death rates among US blacks? A.Une

33、qual access to medical Care. B.Greater probability of having other diseases. C.Differences in the biology of the cancer. D.Early diagnosis.（分数：3.00）A.B.C.D.(3).Cancer is more treatable if it is detected _. A.in an early stage. B.in a late stage. C.all of a sudden. D.together with other diseases.（分数：

34、3.00）A.B.C.D.(4).Public policy and education efforts may help to do away with _. A.death rates. B.various cancers. C.unfair social differences. D.biological differences.（分数：3.00）A.B.C.D.(5).Since 1992, cancer death rates among black Americans _. A.have been going up and down. B.have remained stable.

35、 C.have increased. D.have fallen.（分数：3.00）A.B.C.D.六、B第二篇/B(总题数：1，分数：15.00)Crystal EarOne day a friend asked my wife Jill if I wanted a hearing aid “He certainly does.“ replied Jill. After hearing about a remarkable new product, Jill finally got up the nerve to ask me if Id ever thought about getting

36、 a hearing aid. “No way,“ I said. “It would make me look 20 years older.“ “No, no,“ she replied. “This is entirely different. Its Crystal Ear!“Jill was right. Crystal Ear is differentnot the old-styled body worn or over-the-ear aid, but all advanced personal sound system so small that its like conta

37、cts (隐形眼镜) for your ears. And Crystal Ear is super-sensitive and powerful, too. You will hear sounds your ears have been missing for years. Crystal Ear will make speech louder, and the sound is pure add natural.I couldnt believe how tiny it is. It is smaller than the tip of my little finger and its

38、almost invisible when worn. There are no wires, no behind-the-ear device. Put it in your ear and its ready-to-wear mold(形状) fits comfortably. Since its not too loud or too tight, you may even forget that youre wearing it! Use it at work or at play. And if your hearing problem is worse in certain sit

39、uations, use Crystal Ear only when you need it.Hearing loss, which occurs typically prior to teenage years, progresses throughout ones lifetime. Although hearing loss is now the worlds number one health problem, nearly 90 percent of people suffering hearing loss choose to leave the problem untreated

40、. For many millions, treating hearing loss in a conventional way can involve numerous office visits, expensive testing and adjustments to fit your ear. Thanks to Crystal Ear, the “sound solution“ is now convenient.Almost 90 percent of people with mild hearing loss, and millions more with just a litt

41、le hearing drop-off (下降), can be dramatically helped with Crystal Ear. More over, its superior design is energy-efficient, so batteries can last months. Crystal Ear is now available to help these people treat their hearing loss with a small hearing amplifier (放大器).（分数：15.00）(1).Initially the writer

42、did not want to buy a hearing aid because _. A.it would make him look old. B.it would make him nervous. C.it was too expensive. D.it was old-styled.（分数：3.00）A.B.C.D.(2).Which of the following is NOT true of Crystal Ear? A.It is highly sensitive. B.It is powerful. C.It is invisible. D.It is wireless.

43、（分数：3.00）A.B.C.D.(3).One special feature of Crystal Ear is that _. A.you can control its volume. B.you neednt take it off everyday. C.it is solar-powered. D.it saves power.（分数：3.00）A.B.C.D.(4).According to the passage, hearing loss is _. A.only a minor health problem. B.the worlds most common health

44、 problem. C.merely a teenage disease. D.an incurable disease.（分数：3.00）A.B.C.D.(5).Many people leave their hearing problem untreated because _. A.it is not serious. B.Crystal Ear is not yet available. C.it is not easy to have it treated. D.they dont want to look old.（分数：3.00）A.B.C.D.七、B第三篇/B(总题数：1，分数

45、：15.00)Batteries Built by VirusesWhat do chicken pox, the common cold, the flu, and AIDS have in common? Theyre all disease caused by viruses, tiny microorganisms that can pass from person to person. Its no wonder that when most people think about viruses, finding ways to steer clear of viruses is w

46、hats on peoples minds.Not everyone runs from the tiny disease carriers, though. In Cambridge, Massachusetts, scientists have discovered that some viruses can be helpful in an unusual way. They are putting viruses to work, teaching them to build some of the worlds smallest rechargeable batteries.Viru

47、ses and batteries may seem like an unusual pair, but theyre not so strange for engineer Angela Belcher, who first came up with the idea. At the Massachusetts Institute of Technology (MIT) in Cambridge, she and her collaborators bring together different areas of science in new ways. In the case of the virus-built batteries, the scientists combine what they know about biology, technology and production techniques.Belchers team includes Paula Hammond, who helps put together the tiny batteries, and Yet-Ming Chiang, an expert o