向高地输水的泵房,当水泵设有止回阀或底阀时,应进行()压力计算。A.静扬程 B.停泵 发布时间:2017-07-25 05:39 │ 来源:www.tikuol.com 题型:单项选择题 问题: 向高地输水的泵房,当水泵设有止回阀或底阀时,应进行()压力计算。A.静扬程B.停泵水锤C.饱和蒸汽压D.基础承载
题型:单项选择题 The main purpose of the Customs supervision and control is to () China's economic, trade, scientifrc, technological and cultural exchanges with other countries.A. superviseB. controlC. promoteD. limit 查看答案