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第1题

[阅读题,10分] Why does cram go bad faster than butter?Some researchers think they have the answer, and it comes down to the
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第2题

[阅读题,10分] Believe it or not, optical illusion (错觉)can cut highway crashes. Japan is a case in point. It has re
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第3题

[阅读题,10分] There seems never to have been a civilization without toys, but when and how they developed is unknown. They
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第4题

阅读题,10分] Long after the 1998 World Cup was won, disappointed fans were still cursing the disputed refereeing (
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