Which is NOT a possible cause of mental retardation、

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• 1Which Of the following is NOT true of mental retardation、

  A.It is not curable.

  B.Its victims are usually born with it.

  C.Its causes are not fully identified yet.

  D.It can spread among family members.

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• 2A person of high intelligence will probably score.

  A.above 110 on an IQ test.

  B.110 on an IQ test.

  C.90 on an IQ test.

  D.below 75 on an IQ test.

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• 3A child can be taken as mentally retarded.f he or she.

  A.was born prematurely.

  B.has lower than normal intelligence.

  C.has low intelligence and low daily living skills.

  D.has normal intelligence but difficulties in learning.

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• 4The word "message'' in the last paragraph means

  A.printed news.

  B.contact.

  C.meaning.

  D.central idea.

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• 5According to the Kaiser Poll,which of the following is NOT correct、

  A.The country is making progress against AIDS.

  B.AIDS drugs still cannot save people's lives.

  C.AIDS drugs can now make people live longer.

  D.More and more people die of AIDS now.

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• 6.The word “While” in Line 4 from the bottom can best be replaced by.

  A..Unless.

  B.Because.

  C.Since.

  D.Although.

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• 7People buy cell phones for the following reasons EXCEPT that

  A.they’re popular.

  B.they’re useful.

  C.they’re convenient.

  D.they’re cheap.

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• 8The word“detected”in paragraph 3 could be best replaced by

  A.cured.

  B.removed.

  C.discovered

  D.caused

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• 9The salesman retired young because

  A.he couldn’t remember simple tasks.

  B.he disliked using mobile phones.

  C.he was tired of talking on his mobile phone.

  D.his employer’s doctor persuaded him to.

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• 10On the safety issue of mobile phones,the manufacturing companies

  A.hold that the amount of radiation is too small to worry about.

  B.deny the existence of mobile phone radiation.

  C.develop new technology to reduce mobile phone radiation.

  D.try to prove that mobile phones are not harmful to health.

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