单项选择题
When liquid reaches the compressor of a refrigeration system through the suction line, the condition is called （）.
A.flooding back
B.superheating
C.overflowing
D.recycling
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B.Seal pump shaft against entry of air
C.Isolate the discharge side from the suction side
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单项选择题
If air at 95℃ dry bulb temperature and 50% relative humidity is conditioned to 75℃ dry bulb temperature and 50% relative humidity, it is an example of （）.
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