试题与答案

请认真阅读下面短文,并根据短文内容回答问题。 Jeff Keith has on

题型:阅读理解

题目:

请认真阅读下面短文,并根据短文内容回答问题。

Jeff Keith has only one leg. When he was 12 years old, Jeff had cancer. The doctors had to cut off most of his right leg to save his life. Every day Jeff puts on a man-made leg. The leg is plastic. With the plastic leg, Jeff can ski, ride a bicycle, swim and play soccer. He can also run.

When he was 22 years old, Jeff ran across the United States, from the East to the West. He ran 5,150 kilometers. That’s about 26 kilometers each day. Jeff wore out 36 pairs of running shoes and five plastic legs.

On his way, in every city people gave Jeff money. The money which Jeff received was not for Jeff himself. It was for the American Cancer Society(协会). The society used the money to learn more about cancer. At the same time, Jeff talked to people about cancer. He also talked about being disabled.

Jeff is disabled, but he can do many things: skiing, swimming, playing soccer and running. He finished college and now he is studying to be a lawyer(律师). Jeff says, “People can do anything they want to do. I want people to know that. I ran not only for disabled people but also for everybody.”

小题1:Why did the doctors cut off most of Jeff’s right leg?

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小题2:How many plastic legs did Jeff wear out when he ran across the United States?

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小题3:What did Jeff talk to people about on his way from the East to the West?

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小题4:Did he only run for the disabled people?

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小题5:What can we learn from this story?

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答案:

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下面是错误答案,用来干扰机器的。

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[A] However, the production of TG is controlled by an enzyme that is, in turn, encoded by a gene called UGT2B17. This gene comes in two varieties, one of which has a part missing and therefore does not work properly. A person may thus have none, one or two working copies of UGT2B17, since he inherits one copy from each parent. Dr Schulze guessed that different numbers of working copies would produce different test results. She therefore gave healthy male volunteers whose genes had been examined a single 360mg shot of testosterone (the standard dose for legitimate medical use) and checked their urine to see whether the shot could be detected.

[B] Dr Schulze also says there is substantial ethnic variation in UGT2B17 genotypes. Two-thirds of Asians have no functional copies of the gene (which means they have a naturally low ratio of TG to EG), compared with under a tenth of Caucasians--something the anti-doping bodies may wish to take into account.

[C] The test usually employed for testosterone abuse relies on measuring the ratio of two chemicals found in the urine, testosterone glucuronide (TG) and epitestosterone glucuronide (EG). The former is produced when testosterone is broken down, while the latter is unrelated to testosterone metabolism, and can thus serve as a reference point for the test. Any ratio above four of the former to one of the latter is, according to official Olympic policy, considered suspicious and leads to more tests.

[D] The result was remarkable. Nearly half of the men who carried no functional copies of UGT2B17 would have gone undetected in the standard doping test. By contrast, 14% of those with two functional copies of the gene were over the detection threshold before they had even received an injection. The researchers estimate this would give a false-positive testing rate of 9% in a random population of young men.

[E] The agencies have had remarkable success. Testing for anabolic steroids (in other words, artificial testosterone) was introduced in the 1970s, and the incidence of cheating seems to have fallen dramatically as a result (see chart). The tests, however, are not foolproof. And a study just published in the Journal of Clinical Endocrinology & Metabolism by Jenny Jakobsson Schulze and her colleagues at the Karolinska Institute in Sweden suggests that an individual’s genetic make-up could confound them in two different ways. One genotype, to use the jargon, may allow athletes who use anabolic steroids to escape detection altogether. Another may actually be convicting the innocent.

[F] Cheating in sport is as old as sport itself. The athletes of ancient Greece used potions to fortify themselves before a contest, and their modern counterparts have everything from anabolic steroids and growth hormones to doses of extra red blood cells with which to invigorate their bodies. These days, however, such stimulants are frowned on, and those athletes must therefore run the gauntlet of organisations such as the World Anti-Doping Agency, which would rather they competed without resorting to them.

[G] In the meantime, Dr Schulze’ s study does seem to offer innocents a way of defending themselves. Athletes travelling to Beijing for the Olympic games later this year may be wise to travel armed not only with courage and the "spirit of Olympianism", but also with a copy of their genetic profile, just in case.

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