单项选择题
A.rise B.fall C.be maintained constant D.None of the above is true
In the refrigeration compressor the temperature of the ...
单项选择题In the refrigeration compressor the temperature of the vapor is （） by compression.
A.raised B.risen C.reduced D.maintained constant
It should be ensured that only （） vapor is handled by t...
单项选择题It should be ensured that only （） vapor is handled by the refrigeration compressor.
A.humidity B.dry C.steam D.oil
A refrigerant gives up heat when it goes through （）.A.c...
单项选择题A refrigerant gives up heat when it goes through （）.
A.condenser B.regurgitate C.evaporator D.boil coil
