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單項(xiàng)選擇題

In the process of （）, liquid changes into gas.

A.evaporation
B.frosting
C.condensing
D.compressing

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單項(xiàng)選擇題

The designed capacity is 25 tons a day, but the fresh water generator can only （） 22 tons at present.

A.consume
B.distill
C.run
D.operate

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