单项选择题
A.lower B.higher C.the lower D.the higher
In the process of （）, liquid changes into gas.A.evapora...
单项选择题In the process of （）, liquid changes into gas.
A.evaporation B.frosting C.condensing D.compressing
The designed capacity is 25 tons a day, but the fresh w...
单项选择题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
Clean oil is achieved in a clarifier bowl where the imp...
单项选择题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
