单项选择题
The compressor suction line conveys the refrigerant vapor from （） to （）.
A.condenser；evaporator B.evaporator；compressor C.compressor；condenser D.None of the above
单项选择题 Both the temperature and the pressure of the refrigerant are increased in the （）.
单项选择题 The heat used to change a liquid to a vapor is called （）.
单项选择题 The （） compressor and its electrical motor are entirely housed in a gas-tight casing.
