A.increase；reduce
B.reduce；increase
C.increase；increase
D.reduce；reduce
您可能感興趣的試卷
你可能感興趣的試題
A.instantaneous
B.instantaneously
C.simultaneous
D.simultaneously
A.An economizer
B.An attemperator
C.A water dram
D.A down-comer tube
A.cap
B.disc
C.tag
D.cover
A.open
B.close
C.opens
D.closes
A.welcome
B.admitted in some special sea areas
C.prohibited
D.acceptable
最新試題
The output volume of a positive fixed displacement pump can be changed only by （）.
The control mode in which the final control element is moved from one of two flexed positions to the other is known as （）.
The rate of heat transfer from a hot region to a cold region is affected most by the （）.
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.
A pressure drop through the refrigerant liquid line may cause （）.
The usual symptoms of cavitation in a centrifugal pump is （）.
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.
When the steering gear is in operation, you should （）.