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问题:

[单选题] From the text we learn that__________.

  • A bioterrorism is an engineered threat to human beings
  • B bioterrorism can be arrested by improving communication
  • C natural infections and bioterrorism are the same in essence
  • D the anthrax attacks are more threatening than the outbreak of SARS
  • 参考答案:
    A

      参考解析

    【答案】A
    【解析】从原文第三段第一句话:“Whether the biggest threat is natural or engineered,much remains to be done”看出,bioterrorism是engineered,所以A对。B选项错在“can be arrested”上。原文是说能够减轻,但不能制止。C说自然的和恐怖主义性质的传染病是同一种性质的,显然不对,因为一个是natural,一个是engineered。D项同样不对。

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