压缩空气管道安装管道弯头应尽量煨弯,其弯曲半径不应小于(  )。

压缩空气管道安装管道弯头应尽量煨弯,其弯曲半径不应小于(  )。A.2D B.3D C.4D D.5D

查看答案

高压钢管验收时,当管子外径大于或等于(  )mm时作压扁试验。

高压钢管验收时,当管子外径大于或等于(  )mm时作压扁试验。A.20 B.25 C.30 D.35

查看答案

当室外给水管网水质水量水压均能满足建筑物内不用水要求时,应首先考虑采用(  )。

当室外给水管网水质水量水压均能满足建筑物内不用水要求时,应首先考虑采用(  )。A.单设水箱给水方式 B.直接给水方式 C.设贮水池、水泵的给水方式 D.设水泵

查看答案

Questions 5 to 7 will be based on the following news item.

Questions 5 to 7 will be based on the following news item.A.They were between Ch

查看答案

Questions 3 and 4 will be based on the following news item.

Questions 3 and 4 will be based on the following news item.A.When he was skating

查看答案