单项选择题
A.a brine pump B.an air ejector C.a feed pump D.distillate pump
When a vacuum boiling evaporator works, the hot jacket ...
单项选择题When a vacuum boiling evaporator works, the hot jacket water will pass over the tube stack and （） the sea water passing through the tubes.
A.dispose B.dissolve C.heat D.dissipates
（） is the production of pure water from sea water by ev...
单项选择题（） is the production of pure water from sea water by evaporation and re-condensing.
A.Evaporation B.Circulation C.Condensation D.Distillation
Which of the following can be used in hydraulic transmi...
单项选择题Which of the following can be used in hydraulic transmission system?（）
A.Hydraulic oil B.Animal oil C.Light oil D.Fuel oil
