单项选择题
A.the temperature and flow quantity of the exhaust gas from M/E
B.the quantity of steam demanded
C.the rotary speed and the cooling water temperature of main engine
D.efficiency of M/ turbocharger
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?（）
单项选择题 What is the result of converting 10℃ into degree of Fahrenheit?（）