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问题:

[单选题] According to the author,which of the following most interested the researchers?

  • A The mice that started dieting in old age.
  • B 27 of those 46 0ld genes that continued to behave like young genes.
  • C Calorie restriction that works in people.
  • D Dieting that makes sure a drug is effective.
  • 参考答案:
    A

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