單項(xiàng)選擇題

With four-stroke engines, it takes four revolutions of the crank shaft to make （） power stroke(s).

A.1
B.2
C.4
D.8

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單項(xiàng)選擇題

With （） unit the timing of fuel injection of an engine can be regulated automatically.

A.MBT
B.MEG
C.VSG
D.VIT

單項(xiàng)選擇題

With supercharging a larger mass of air is supplied to the cylinder by blowing it in under pressure, which is the best means to （） of the engine.

A.increase the exhaust temperature
B.increase the power of
C.reduce the speed
D.increase the fuel consumption