试题与答案

全淹没干粉灭火系统防护区的开口,面积不应大于该防护区总内表面积的()。A、5% B、

题型:单项选择题

题目:

全淹没干粉灭火系统防护区的开口,面积不应大于该防护区总内表面积的()。

A、5%

B、10%

C、15%

D、20%

答案:

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