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    Exploring the moon is a(n) to China as well as the whole world. A.opportunity B.challenge C.reaction D.threat 【查看更多】

     

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    Exploring the moon is a(n) _____ to China as well as the whole world.

    [     ]

    A. opportunity
    B. challenge
    C. reaction
    D. threat

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    Exploring the moon is a(n)________ to China as well as the whole world．


    1. A.
      opportunity
    2. B.
      challenge
    3. C.
      reaction
    4. D.
      threat

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