A.lower；higher
B.shallower；deeper
C.larger；smaller
D.higher；lower
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A.evaporation
B.frosting
C.condensing
D.compressing
A.rise
B.fall
C.be maintained constant
D.None of the above
A.rise
B.fall
C.be maintained constant
D.None of the above is true
A.raised
B.risen
C.reduced
D.maintained constant
A.humidity
B.dry
C.steam
D.oil
最新試題
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.
The general purpose of a heat exchanger is to （）.
If you are given the job of adding hydraulic fluid to a mooring winch, and are not certain as to the type of fluid to use, you should （）.
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will （）.
Which of the listed pumps is NOT a positive displacement pump?（）
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.
The output volume of a positive fixed displacement pump can be changed only by （）.
Low compressor head pressure in a refrigeration system can be caused by（）.
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）