开循环氢压缩机时，内操应注意什么？外操应注意什么？
查看答案
《企业破产法》规定，破产企业的财产先行清偿破产费用。
A. 正确
B. 错误
In readying an auxiliary water-tube boiler for a routine hydrostatic test, which of the following procedures should be undertaken prior to filling the boiler with fresh water?（）
A. The safety valve escape piping should be disconnected from the valve body and a blank inserted
B. The boiler vent valves should be opened
C. All handhole/manhole covers should be tightened up as much as possible to preclude any leaks
D. All of the above
混凝土重力坝中横缝的主要作用是（）。
A. 适应混凝土的浇筑能力
B. 散热
C. 适应地基的不均匀沉降和坝体温度变化
D. 只是适应坝体温度变化
微信支付 
支付宝支付