Which of the following terms represents the form of heat removed from the refrigerant in the condenser of a refrigeration system?（）

A.Solar gain
B.Infiltration and ventilation air
C.Occupants inside the space
D.Entertainment equipment within the space

A.The high discharge pressure of the rotary pumps permits a larger volume of fluid per unit time than the reciprocating pump
B.Rotary pumps are capable of pumping more fluid than reciprocating pumps of the same weight
C.Rotary pumps occupy only one-half the space of reciprocating pumps
D.Rotary pumps eliminate discharge slippage of the pumped liquid, while this does not hold true for a reciprocating pump

A.misalignment or worn main bearings
B.insufficient cylinder lubrication
C.defective or poorly fitted valves
D.all of the above