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    22． to nuclear radiation, even for a short time, may produce variantsof genes in human bodies. A．Being exposed B．Having exposed C．Exposed D．After being exposed 【查看更多】

     

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    _____ to nuclear radiation, even for a short time, may produce variants (变异体) of genes in bodies.

    A. Being exposed     

    B. Having exposed  

    C. Exposed       

    D. After being exposed

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    ______ to nuclear radiation, even for a short time, may produce variants(变异体) of genes in human bodies.

    A. Being exposed    B. Having exposed  C. Exposed  D. After being exposed

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    ______ to nuclear radiation, even for a short time, may produce variants(变异体) of genes in human bodies.

    　　A. Being exposed    B. Having exposed

    　　C. Exposed        　 D. After being exposed

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    ________ to nuclear radiation, even for a short time, may produce variants (变异体) of genes in human bodies.

    [　　]

    A．Being exposed
    B．Having exposed
    C．Exposed
    D．After being exposed

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    . ___ to nuclear radiation, even for a short time may produce variants（变异体）of genes in human bodies.

      A. Being exposed     B. Having exposed 

      C. Exposed          D. After being exposed

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