单项选择题
The fresh water generator produces fresh water （）.
A.by cooling sea water B.by heating sea water C.by evaporation of sea water D.by purifying sea water
单项选择题 Because of the reduced （） in the vacuum boiling evaporator, some of the sea water boils as it flows through the tubes.
单项选择题 We use （） to distill fresh water from sea water.
单项选择题 In the condenser, the hot, high pressure refrigerant gas is cooled by the sea water and becomes（）.
