According to the passage ,the less active variant of the gene  ______  .

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• 1Which of the following may serve as the best title of the passage、

  A.A Respectable Self-made Family

  B.American Attitude toward Manual Labour

  C.Characteristics of American Culture

  D.The Development of Manual Labour

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• 2The expression “wait on table ”in the second paragraph means “ ______ ”.

  A.work in a furniture shop

  B.keep accounts for a bar

  C.wait to lay the table

  D.serve customers in a restaurant

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• 3According to the passage ,the hostess cooks dinner herself mainly because  ______ .

  A.servants in America are hard to get

  B.she takes pride in what she can do herself

  C.she can hardly afford servants

  D.serve customers in a restaurant

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• 4Form paragraph 1,we can know that in America            .

  A.people tend to have a high opinion of the self-made man

  B.people can always rise to the top through their own efforts

  C.college professors win great respect from common workers

  D.people feel painfus to mention their fathers as labourers

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• 5In advertisement C,the baby sitter should  ______.

  A.have 9 months 'working experience

  B.speak German or French

  C.accept flexible working hours

  D.come from an artistic household

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• 6We can learn from the passage that those men who have stronger ability to endure mental stress usually ______.

  A.have the more active variant of the gene

  B.have the liss active variant of the gene

  C.had ill-treated childhood

  D.had no ill-treated childhood

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• 7According to the passage ,which of the following is NOT true、

  A.One third of the population carry the less active variant.

  B.Boys with the less active will not live normal lives.

  C.Some people disagress with the concept of “violence”gene.

  D.The less active variant and ill-treated experience contribute to violenc

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• 8David King 's comment in the last paragraph implies that  ______  .

  A.he agrees with the research findings of the gene MAOA

  B.he criticizes strongly the possible role of the less active variant

  C.he considers that theresearch is of no great importance

  D.he thinks the finding oversimplify the solution to social problems

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