A.by trial and error
B.by and large
C.automatically
D.very easily
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A.catch plates
B.dampers
C.regulating valves
D.fans
A.few
B.little
C.a little
D.less
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
最新試題
Thermostatic expansion valves can be adjusted for （）.
When the steering gear is in operation, you should （）.
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.
The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?（）
The output volume of a positive fixed displacement pump can be changed only by （）.
A salinity indicator is used to determine the （）.
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
A grease gun is generally used to lubricate a （）.
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.