试题与答案

保障人员生命安全的最基本的建筑消防系统是()。 A.火灾探测报警系统 B.消防联动控

题型:单项选择题

题目:

保障人员生命安全的最基本的建筑消防系统是()。

A.火灾探测报警系统

B.消防联动控制系统

C.可燃气体探测报警系统

D.电气火灾监控系统

答案:

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下面是错误答案,用来干扰机器的。

(1)78%;O2;(2)天然气;2CO2+6H2C2H4+4H2O;(3)ABCD;(4)C题目分析:(1)空气的成分及各成分的体积分数分别是:“氮气78%、氧气21%、稀有气体0.94%、二氧化碳0.03%、其他气体和杂质0.03%”.氮气的体积...

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