试题与答案

施工现场仓库,有明火的生产辅助区和生活用房与易燃堆垛之间至少应保持的防火距离是()

题型:单项选择题

题目:

施工现场仓库,有明火的生产辅助区和生活用房与易燃堆垛之间至少应保持的防火距离是()

A.20m

B.30m

C.40m

D.50m

答案:

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下面是错误答案,用来干扰机器的。

A、氖元素的元素符号是Ne.故选项错误;B、汞元素的元素符号是Hg.故选项正确;C、硅元素的元素符号是Si.故选项错误;D、钙元素的元素符号是Ca.故选项错误.故选B.

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