试题与答案

从褐煤导烟煤属()作用。A.变质 B.成岩 C.泥炭化 D.煤化

题型:单项选择题

题目:

从褐煤导烟煤属()作用。

A.变质

B.成岩

C.泥炭化

D.煤化

答案:

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