单项选择题

Fuel pump index is （）.

A.the viscosity index
B.the fuel oil contents
C.the starting speed
D.the reading at the rack

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单项选择题

A.have nothing to do with
B.having nothing to do with
C.have much to do with
D.having much to do with

单项选择题

A.a transfer pump
B.a bilge pump
C.a service pump
D.a vacuum pump

单项选择题

A.a failure of the motor
B.a failure of lubricator
C.a failure of cylinder
D.a failure of fuel pump