Which of the following statements best summarizes the main idea of the passage 、

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• 1Opponents of Bill Joy would NOT agree to____  .

  A.control nanotech export

  B.ban nanotech research to avoid any possible dangers

  C.put forth bills on nanotech research and development

  D.establish a certification system for annotech companies

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• 2To call for a delay on commercial nanotech , critics of nanotech make use of____  .

  A.current social problems

  B.science fiction descriptions

  C.disagreements in the scientific community

  D.the fact that no one is doing molecular manufacturing

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• 3K. Eric Drexler in his book predicts a future world with sufficient material , because____  .

  A.man-made plants could replace real plants and grow more quickly

  B.plants produced by nanotech would be as efficient as today’s solar cells

  C.man-made bacteria would be widespread and capable of self-replicating

  D.humans could create copies of anything alive with high technology

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• 4The purpose of this article is to____  .

  A.compare the traditional diet with today’s diet of Asian children

  B.find reasons for increased food consumption of Asian people

  C.explain why many Asian children are overweight nowadays

  D.prove the relationship between fatness and indoor play

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• 5Some parents feel bad when their children look thin , because____  .

  A.their children don’t love eating and drinking

  B.their children don’t have a good physical condition

  C.they feel that they don’t take good care of their children

  D.they feel that they are not wealthy enough to afford ‘quality food’

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