A、A.when
B、B.because
C、C.unless
D、D.though
更多“The system of derricks and winches has been largely replaced on newer ships by cranes（）it is very efficient.”相关的问题
A、A.cooling water of the cooling system B、B.fuel of the FO system C、C.LO of the LO system D、D.cooling water of the cooling system and LO of the LO system
A、Increasing the size of a logical volume also increases the size of the file system B、Reducing the size of a logical volume requires reducing the size of the file system first C、Increasing the size of a file system requires increasing the size of the logical volume first D、Increasing the size of a file system also increases the size of the logical volume when necessary
A、Constant pressure system B、Variable pressure system C、Variable displacement system D、Constant volume system
A、is made to circulate out of the system B、is made to circulate within the system C、is made circulate within the system D、is made circulate out of the system
A、loss of flow in the fuel system B、loss of pressure in the air system C、loss of flow in the lubricating system D、loss of pressure in the lubricating system
A、causes colloid suspension in the cooling water B、reduces the capability of the lubrication system C、can form pockets which block the flow of coolant through the system D、leads to the scuffing of cylinder walls
A、a shortage of refrigerant in the system B、air in the system C、an accumulation of liquid refrigerant in the crankcase D、a shortage of oil in the crankcase
A、discharge side of the centrifugal pump B、suction side of the centrifugal pump C、the lowest point of the cooling water system D、inlet of the main engine
A、the differing light colors B、one system having odd numbers while the other system has even numbers C、one system using horizontal bands while the other system uses vertical stripes D、the difference in the periods of the light
A、A.the lack of a feedback B、B.the presence of a feed back C、C.the lack of a computer D、D.the presence of a computer
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