单项选择题
A.will be modulated in proportion
B.will be modulated in proportion and integral
C.will be modulated in proportion and differential
D.will not be modulated at all
单项选择题 For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
单项选择题 Which of the following equipment can not be used for the waste heat recovery of the M/E to further improve its thermal efficiency?（）
单项选择题 When comparing the air with 50% of relative humidity with the air with 100% of relative humidity, which one will hold more water?（）