单项选择题
The thermal expansion valve reacts directly to the （）
A.temperature in the space being cooled B.liquid refrigerant pressure at the solenoid valve C.pressure drop across the evaporator coils D.refrigerant gas superheat at the coil outlet
单项选择题 One function of the thermal expansion valve is to（）
单项选择题 Constant superheat is maintained at the evaporator outlet of a refrigeration coil by a（）
单项选择题 Hot gas bypass is one of the methods used to （）
