试题与答案

滚筒的直径主要决定于所采煤层的()和采煤机的形式。 A.走向 B.厚度 C.硬度 D

题型:单项选择题

题目:

滚筒的直径主要决定于所采煤层的()和采煤机的形式。

A.走向

B.厚度

C.硬度

D.长度

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B

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