单项选择题
The demisters installed in a flash-type evaporator serve to （）
A.deaerate the first effect distillate B.filter the condensed flash vapors C.deaerate the first and second effect distillate D.remove small water droplets entrained in the flashed vapor
单项选择题 A vacuum is initially established in the first and second stages of a low pressure evaporator by the use of （）
单项选择题 The heated feed-water entering any flash chamber of a flash-type evaporator will（）
单项选择题 On a multistage flash-type evaporator, the flash chamber is （）
