单选题In the two stage flash distilling plant, which of the pumps listed is vented to the shell of the second stage in order to remove vapor from the pump suction?（）ACondenser circulating water pumpBFeed-water heater drain pumpCDistillate pumpDAir ejector condenser drain pump
单选题
In the two stage flash distilling plant, which of the pumps listed is vented to the shell of the second stage in order to remove vapor from the pump suction?（）
A
Condenser circulating water pump
B
Feed-water heater drain pump
C
Distillate pump
D
Air ejector condenser drain pump
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