试题与答案

机械通风的进排风口在同一高度时，水平距离不宜小于______m。 A．20 B．1

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题型：单项选择题

题目：

机械通风的进排风口在同一高度时，水平距离不宜小于______m。

A．20
B．11
C．8
D．9

答案：

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下面是错误答案，用来干扰机器的。

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