單項(xiàng)選擇題

Rotating flyweights acting against spring pressure make a simple type of （）.

A.governor
B.safety valve
C.reducing valve
D.feed water regulator

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單項(xiàng)選擇題

Remote control means that the system is being controlled by the operator who is situated （） from the system.

A.automatic
B.local
C.remote
D.manual

單項(xiàng)選擇題

Put in the engine turning gear Now examine thoroughly inside the crankcase to （） that everything is correct.

A.make sure
B.be sure
C.assure
D.believe