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  3. The idea seems sort of foolish, just another exercise trick. Stand for a few minutes on a platform that vibrates. Get off and tr

The idea seems sort of foolish, just another exercise trick. Stand for a few minutes on a platform that vibrates. Get off and tr

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问题     The idea seems sort of foolish, just another exercise trick. Stand for a few minutes on a platform that vibrates. Get off and try to do some weight lifting. Or see how high you can jump. You are【C1】______supposed to be able to lift heavier weights and jump higher.
    But maybe it’s not so【C2】______, exercise experts say. Although they don’t really know why vibrations should work, researchers report that they actually seem to slightly improve【C3】______in the few minutes after a person gets off the machine.
    The problem,【C4】______, is that there is little【C5】______on how fast the vibrations should be or in what direction platforms are【C6】______to vibrate. Some studies have【C7】______to show any effects from vibrations. And then there is the question of【C8】______exactly vibrations are doing to muscles and nerves.
    "It【C9】______is arousing interest, and a large portion of the【C10】______would support that something is happening," said Lee E. Brown, an expert at California State University. But he added, "We are still trying to【C11】______exactly what the mechanism is."
    Meanwhile, several companies make the vibrating platforms, and they are being used at gyms and【C12】______some athletes. One company, Power Plate,【C13】______that stars like Serena Williams and Justin Morneau, of the Minnesota Twins, train with its【C14】______. Another company, Wave, says the United States ski team used its vibrating plates in training【C15】______the coming Winter Olympics.
    But researchers are【C16】______. "There is something to it," said William J. Kraemer, a professor at the University of Connecticut,【C17】______it "another tool" for athletic conditioning. But he added that other conditioning methods might【C18】______the same or better results. Researchers say, people should be appropriately skeptical about the effects of standing on a vibrating platform. "We don’t know a lot about prescribing it," Dr. Kraemer said. "There’s the【C19】______. Research is trying to【C20】______up."
【C10】
选项 A、achievement
B、experience
C、evidence
D、document
答案C
解析 上下文语义题。专家Lee E．Brown在此处是对“振动”表示了一定的肯定，由谓语would support that something is happening“支持了某种东西的确在起作用”可知，能够证明发生的事情当然用“证据”，故选C项evidence“证据”。
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