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问题:

[单选题] According to the third paragraph,what will happen when the underground heat does not dis—appear?

  • A Coal heats up on its Own and catches fire and burns.
  • B The underground oxygen will be used up.
  • C Poisonous fumes and greenhouse gases wm be accumulated anderground.
  • D There will be an increase of abandoned mines.
  • 参考答案:
    A

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