A.fresh water
B.vapor
C.mixture
D.liquid
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A.temperature
B.pressure
C.velocity
D.heat
A.symptoms
B.samples
C.traces
D.tracks
A.expand
B.evaporate
C.condense
D.distil
A.little
B.few
C.a little
D.a few
A.liquid
B.oily mixture
C.emulsion
D.vapor
最新試題
The control mode in which the final control element is moved from one of two flexed positions to the other is known as （）.
A salinity indicator is used to determine the （）.
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.
The major source of chemical contaminants in hydraulic fluid is （）.
If the suction pressure at the refrigeration compressor is below normal, the cause can be（）.
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.
Which of the following statements is correct concerning heat transfer?（）