单项选择题
A.bottle B.injector C.piston D.barrel
The fuel injector pump is operated by （） which drives t...
单项选择题The fuel injector pump is operated by （） which drives the plunger up and down.
A.a separate motor B.a cam C.a generator D.a chain
The fuel injector injects a fine spray of fuel into the...
单项选择题The fuel injector injects a fine spray of fuel into the hot air and combustion （）, producing much high pressure in the gases.
A.has begun B.takes place C.occurs D.happens
The fresh air coming in through the inner air ports, is...
单项选择题The fresh air coming in through the inner air ports, is compressed by（） to a higher pressure.
A.the cylinder head B.the cross-head C.the moving piston D.the stationary piston
