2021职称英语考试考前冲刺卷（2）.docx

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1、2021职称英语考试考前冲刺卷（2）本卷共分为1大题50小题，作答时间为180分钟，总分100分，60分及格。一、单项选择题（共50题，每题2分。每题的备选项中，只有一个最符合题意） 1.Memory Class Stan Field knows what age can do to a persons memory, and hes not taking any chances with his. He chooses his food carefully and gets plenty of exercise. He also avoids stress, coca cola and ci

2、garette smoke. Whats more, at breakfast each morning, the 69-year-old chemical engineer swallows a plateful of pills in the hope of boosting his brain power. Michelle Amove is less than half Fields age, but no less concerned about her memory. While working round the clock to finish a degree in film

3、studies, the 33-year-old New Yorker had the alarming sensation that she had stopped retaining anything. I couldnt even remember names, she says. I thought, Oh, no, Im over 30. Its all downhill from here. Besides loading up on supplements, Amove signed up for a memory enhancing course at New Yorks Mo

4、unt Siani Medical Center. And when she got there, she found herself surrounded by people who were just as worried as she was. For millions of Americans, and especially for baby boomers (生育高峰出生的人) , the demands of the Information Age conflict with a sense of declining physical power. When boomers wer

5、e in their 30s and 40s, they launched the fitness boom, says Cynthia Green, the psychologist who teaches Mount Sinais memory class. Now we have the mental-fitness boom Memory is the boomers new life-crisis issue. And of course a major marketing opportunity. The demand for books and seminars has neve

6、r been greater, says Jack Lannom, a longtime memory trainer whose weekly TV show, Mind Unlimited, goes out to 33 million homes on the Christian Network. Anxious consumers are rushing to buy do-it-yourself programs and supplement makers are trying to sell everything but sawdust (木屑) as a brain booste

7、r. But before you get out your checkbook, a few questions are in order. Does everyday forgetfulness signal declining brain function Is megamemory (超级记忆) a realistic goal for normal people And if you could have a perfect memory, would you really want it Until recently, no one could address those issu

8、es with much authority, but our knowledge of memory is exploding. New techniques are revealing how different parts of the brain interact to preserve meaningful experiences. Biologists are trying to understand the underlying (潜在的) chemical processes and neuroscientists (神经系统科学家) are discovering how a

9、ge, stress and other factors can disrupt them. No one is close to finding the secret to perfect recall, but as youll see, that may be just as well.What is the meaning of working round the clockAWorking day and night.BMaking clocks.CWorking with a clock nearby.DRepairing clocks. 2.Optimistic Prognosi

10、s Most doctors are too optimistic in predicting how long dying patients have to live, and this has a negative effect on the care they receive in their final days, American researchers said Friday. A study by scientists at the University of Chicago Medical Center in Illinois showed that of the surviv

11、al estimates for 486 terminally ill patients given by 343 doctors, _(46). _ (47). And in some cases doctors predicted patients had five time longer to live than proved to be the case. Doctors are inaccurate in their prognoses (预后) for terminally ill patients and the error is systematically optimisti

12、c, professor Nicholas Christakis and Dr Elizabeth Lamont said in a report in The British Medical Journal. The researchers added that doctors who knew their patients best were more likely to get it wrong. _(48) ,the type of systematic bias toward optimism that we have found in doctors objective progn

13、ostic assessments may be adversely(不利地)affecting patient care, the researchers added. Instead of receiving three months of hospice care, which is considered to be the ideal,_(49 ). Patients who thought they had longer to live also opted for more aggressive treatment instead of palliative (治标的)care,

14、the report said. The researcher suggested doctors should get second opinions from colleagues_( 50 ) , before giving a prognosis. Reliable prognostic information is a key determinant in both doctors and patients decision making, they said.A. many patients received only one months care because of the

15、optimistic prognosis.B. Although some error is unavoidable.C. a lot of patients are eager to leave the hospital.D. only 20 percent were accurate.E. Particularly if they know a patient well.F. Sixty three percent of the predictions overestimated the time patients had left. 3.Old Mothers Children Have

16、 Higher Diabetes (糖尿病) Risk Children of older mothers run a higher risk of developing insulin-dependent (胰岛素依赖型的) diabetes, the British Medical Journal said. A strong association was found between increasing maternal (母亲的) age at delivery and risk of (insulin-dependent) diabetes in the child. Risk w

17、as highest in firstborn children and decreased progressively with higher birth order, Professor Edwin Gale and colleagues at Southmead Hospital in Bristol said. Diabetes is a serious, incurable, lifelong disease characterized (以.作为特性) by all inability to control the amount of sugar in the blood. Ins

18、ulin-dependent diabetes, which mainly affects children, is treated by administering the hormone insulin. Gale looked into 1,375 families in the Oxford area where one or more children had diabetes and found that the risk of a child developing insulin-dependent diabetes increased by 25 percent for eac

19、h five-year band of the mothers age. The risk of developing diabetes was also linked to the age of the father. For every five-year band of the fathers age the risk of the child developing diabetes increased by nine percent. The risk of diabetes was high est among the firstborn children of mothers wh

20、o started their families late and the risk decreased by about 15 percent for each subsequent child, the BMJ said. The older the mother, the earlier the start of insulin-dependent diabetes in the child. Other studies have already shown that children born to older mothers, over the age of 35, have an

21、increased risk of diabetes but this study is the first to establish that risk increases continuously in relation to increasing maternal age, Dr. Polly Bingley of Southmead Hospital told Reuters (路透社). The new study is the first to show that risk is related to birth order. The study also partly expla

22、ins increasing diabetes. Between 1970 and 1996 the proportion of children born to mothers aged between 30 and 34 increased to 28 percent from 15 percent and this could account for rising numbers of childhood diabetes patients, the scientists said in the alarming increase in the rate of (insulin-depe

23、ndent) diabetes among children in recent years. This study may well provide a clue to the understanding of this problem. It is most likely that there are a number of factors to explain the increase, Diabetes UK said. There are some 1.4 million diagnosed diabetes sufferers in Britain, the charity Dia

24、betes UK said. Of these 1.4 million sufferers there are 20,000 people under age 20 who suffer from insulin-dependent diabetes.What kind of child may be at the highest risk of developing insulin-dependent diabetesAThe first-born children whose mothers started their families late.BThe children whose m

25、others are five years younger than their fathers.CThe third-born children whose fathers got married late.DThe children whose fathers are five years younger than their mothers. 4.Regeneration of Limbs Most people would agree that it would be wonderful if humans could regenerate limbs. Those who have

26、lost their arms or legs would be complete again. The day is still far off when this might happen. But in the last 10 years, doctors have reported regeneration in smaller parts of the body, most often fingers. Regeneration is not a newly-discovered process. For centuries, scientists have seen it work

27、 in some kinds of animals. Break off a lizards (蜥蜴的) tail, for example, and it will grow a new tail. Scientists now are looking for a way to turn on this exciting ability in more highly-developed animals, including humans. Their experiments show that nerves, cell chemistry and the natural electric c

28、urrents in the body all seem to have a part in this process. The body of every animal contains general purpose cells that change into whatever kind of cells the body needs. Animals such as the lizard or salamander (蝾螈) use these cells to regenerate a new tail or leg when the old one is broken off. T

29、hese cells collect around the wound. They form a mass called a blastema (胚基). The cells of the blastema begin to change. Some become bone cells, some muscle cells, some skin cells. Slowly, a new part re-grows from the body outward. When completed, the new part is just like the old one. More than 200

30、 years ago, Italian scientist Luigi Spallanzani showed that younger animals have a greater ability to regenerate lost parts than older animals. So do animals lower on the ladder of evolutionary development. The major difference seems to be that less-developed animals have more nerves in their tails

31、and legs than humans do in their arms and legs. Another helpful piece of information was discovered in the late 1800s. Scientists found that when a creature is injured, an electrical current flows around the wound. The strength of the current depends on how severe the wound is and on how much nerve

32、tissue is present. In 1945, American scientist Meryl Rose tested another idea about regeneration. He thought a new limb might grow only from an open wound. Doctor Rose cut off the front legs of some frogs, below the knee. He kept the wounds wet with a strong salty liquid. This prevented skin from gr

33、owing over the wounds. The results were surprising. Frogs do not regenerate new legs naturally. But these frogs began to grow new limbs. About half of each cut-off leg grew back again. New bones and muscles developed. This research has led doctors to new ways of treating cut-off fingers. Doctors hav

34、e observed, for example, that many children and some adults will re-grow the top of a finger if the wound is left open.Which of the following statements is NOT trueAScientists have lately found that a lizard will grow a new tail if the old one is broken off.BRegeneration is a process discovered cent

35、uries ago.CHow severe a wound is determines the strength of the current flowing around it.DThe lizard, unlike man, is a less-developed animal. 5.Interferon For several years, scientists have been testing a substance called interferon (干扰素),a potential wonder drug that is proving to be effective in t

36、reating a variety of ailments, including virus infections, bacteria infections, and tumors. To date, the new drug has provoked no negative reaction of sufficient significance to discourage its use. But in spite of its success, last year only one gram was produced in the entire world. The reason for

37、the scarcity lies in the structure of interferon. A species specific protein, the interferon produced from one animal species cannot be used in treating another animal species. In other words, to treat human beings, only interferon produced by human beings may be used. The drug is produced by infect

38、ing white blood cells with a virus. Fortunately, it is so potent that the amount given each patient per injection is very small. Unlike antibiotics(抗菌素), interferon does not attack germs directly. Instead, it makes unaffected cells resistant to infection, and prevents the multiplication of viruses w

39、ithin cells. As you might conclude, one of the most dramatic uses of interferon has been in the treatment of cancer. Dr. Hans Strander, research physician at Swedens famous Karolinska Institute, has treated more than one hundred cancer patients with the new drug. Among a group of selected patients w

40、ho had undergone surgical procedures for advanced cancer, half were given conventional treatments and the other half were given interferon. The survival rate over a three-year period was 70 percent among those who were treated with interferon as compared with only 10 to 30 percent among those who ha

41、d received the conventional treatments. In the United States, a large-scale project supported by the American Cancer Society is now underway. If the experiment is successful, interferon could become one of the greatest medical discoveries of our time.The effect interferon has on infection is that it

42、 keeps healthy cells from becoming infected.ARightBWrongCNot Mentioned 6.Memory Class Stan Field knows what age can do to a persons memory, and hes not taking any chances with his. He chooses his food carefully and gets plenty of exercise. He also avoids stress, coca cola and cigarette smoke. Whats

43、more, at breakfast each morning, the 69-year-old chemical engineer swallows a plateful of pills in the hope of boosting his brain power. Michelle Amove is less than half Fields age, but no less concerned about her memory. While working round the clock to finish a degree in film studies, the 33-year-

44、old New Yorker had the alarming sensation that she had stopped retaining anything. I couldnt even remember names, she says. I thought, Oh, no, Im over 30. Its all downhill from here. Besides loading up on supplements, Amove signed up for a memory enhancing course at New Yorks Mount Siani Medical Cen

45、ter. And when she got there, she found herself surrounded by people who were just as worried as she was. For millions of Americans, and especially for baby boomers (生育高峰出生的人) , the demands of the Information Age conflict with a sense of declining physical power. When boomers were in their 30s and 40

46、s, they launched the fitness boom, says Cynthia Green, the psychologist who teaches Mount Sinais memory class. Now we have the mental-fitness boom Memory is the boomers new life-crisis issue. And of course a major marketing opportunity. The demand for books and seminars has never been greater, says

47、Jack Lannom, a longtime memory trainer whose weekly TV show, Mind Unlimited, goes out to 33 million homes on the Christian Network. Anxious consumers are rushing to buy do-it-yourself programs and supplement makers are trying to sell everything but sawdust (木屑) as a brain booster. But before you get

48、 out your checkbook, a few questions are in order. Does everyday forgetfulness signal declining brain function Is megamemory (超级记忆) a realistic goal for normal people And if you could have a perfect memory, would you really want it Until recently, no one could address those issues with much authority, but our knowledge of memory is exploding. New techniques are revealing how different parts of the brain interact to preserve meaningful experiences. Biologists are trying to understand the u