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    36、H1N1 control and prevention is a        to Mexico as well as the whole world.

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

    36、B

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    H1N1 control and prevention is a        to Mexico as well as the whole world.

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    科目：高中英语 来源：黑龙江省哈师大附中2008－2009学年下高一六月考英语试题 题型：014

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