单项选择题
A.release B.absorb C.develop D.regenerate
A fluid coil will （） large quantifies of heat when it c...
单项选择题A fluid coil will （） large quantifies of heat when it changes state from a liquid to a vapor.
What is the substance called which can readily be conve...
单项选择题What is the substance called which can readily be converted from a liquid into a vapor, and also from a vapor into liquid with a reasonably narrow range of pressure?（）
A.Refrigerator B.Refrigerant C.Cooling medium D.Brine
In a refrigeration plant the （） need defrosting.A.fanB....
单项选择题In a refrigeration plant the （） need defrosting.
A.fan B.compressor C.condenser D.evaporator
