單項(xiàng)選擇題

A.lowest absolute humidity
B.lowest relative humidity
C.highest absolute humidity
D.highest relative humidity

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A.change from blue to orange
B.‘flare up’ and remain lighted
C.probably go out
D.stay blue

A.flushed with clean refrigerant oil
B.purged with the refrigerant
C.washed with an ammonia and alcohol solution
D.grounded to compressor