单项选择题
In terms of pressure and temperature in the refrigerant in the compressor, what happens to the primary?（）
A.its pressure and temperature are both lowered B.its pressure and temperature are both raised C.its pressure is lowered and its temperature is raised D.its pressure is raised and its temperature is lowered
单项选择题 The solenoid valve can be typed as a（）
单项选择题 If the compressor runs continually, the cause might be the（）
单项选择题 The bulb for the thermal expansion valve is located（）
