试题与答案

每吨煤在成煤过程中能产生()天然气。A、68~400m3 B、70~350m3 C、

题型:单项选择题

题目:

每吨煤在成煤过程中能产生()天然气。

A、68~400m3

B、70~350m3

C、80~90m3

D、80~400m3

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A

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