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單項(xiàng)選擇題

Engine 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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單項(xiàng)選擇題

Engine （） refers to the relative time of position of crank, at which each operation during the cycle is commenced and is completed.

A.timing
B.power
C.firing order
D.dead center

單項(xiàng)選擇題

Engine （） refers to the relative time of position of crank, at which each operation during the cycle is commenced and is completed.

A.timing
B.deviation
C.firing order
D.phase