首页/ 题库 / [单选题]巷道煤尘堆积厚度超过2mm,长度达到()的答案

巷道煤尘堆积厚度超过2mm,长度达到()米的地方,为煤尘堆积。

单选题
2021-09-01 23:38
A、5.0
B、4.0
C、3.0
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正确答案
A

试题解析

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