A.few
B.little
C.a little
D.less
您可能感興趣的試卷
你可能感興趣的試題
A.pressure
B.temperature
C.density
D.volume
A.pressure
B.temperature
C.density
D.volume
A.the saturation temperature is higher
B.the higher the saturation temperature
C.the higher is the saturation temperature
D.the saturation temperature is more high
A.liquid
B.steam
C.gas
D.electricity
A.did work
B.would work well
C.didnt work
D.wouldnt work
最新試題
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be ().
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of ().
The major source of chemical contaminants in hydraulic fluid is ().
An excessive charge of refrigerant in an air-cooled refrigeration system can cause ().
A pressure drop through the refrigerant liquid line may cause ().
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should ().
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?()
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by ().
The rate of heat transfer from a hot region to a cold region is affected most by the ().
The usual symptoms of cavitation in a centrifugal pump is ().