试题与答案

乙级防火门的耐火极限不低于()h。A．0.7 B．0.6 C．0.8 D．0.9

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题型：单项选择题

题目：

乙级防火门的耐火极限不低于()h。

A．0.7

B．0.6

C．0.8

D．0.9

答案：

参考答案：D

考点：一级消防工程师一级消防工程师综合练习一级消防工程师综合练习题库
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