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.

时间:2022-10-11 02:09:28 所属题库:职称英语

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