单项选择题
A.well ventilated B.well clean C.in good order D.more room
More than one stage of evaporation can take place by ad...
单项选择题More than one stage of evaporation can take place by admitting the sea water into chambers with progressively （） pressure in the flash evaporator.
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
