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下列哪项不是传染病的预防环节()。

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下列哪项不是传染病的预防环节()。

  • A.控制传染源
  • B.保护易感人群
  • C.切断传播途径
  • D.接触传染源后即行主动免疫

参考答案:

D

暂无解析

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