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單項(xiàng)選擇題

Clean oil is achieved in a clarifier bowl where the impurities and water collect at the bowl （）.

A.bottom
B.top
C.center
D.periphery

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單項(xiàng)選擇題

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

單項(xiàng)選擇題

Because of the reduced （） in the vacuum boiling evaporator, some of the sea water boils as it flows through the tubes.

A.temperature
B.water level
C.pressure
D.rate of flow

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