单项选择题 With a vacuum boiling evaporator, the remainder of sea water fed to the evaporator is pumped out by （）.

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.

单项选择题 （） is the production of pure water from sea water by evaporation and re-condensing.