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單項(xiàng)選擇題

Fix the fuel injector into （） after repair.

A.the cylinder liner
B.the cylinder cover
C.the cylinder jacket
D.the piston

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單項(xiàng)選擇題

Failure of fuel injection is usually due to trouble in the （）.

A.exhaust valves
B.mechanical lubricators
C.cooling water pumps
D.fuel injection pumps

單項(xiàng)選擇題

Factor influencing the position of the interface between the liquid seal and the oil in a purifier is （）.

A.throughput
B.back pressure
C.gravity disc
D.None of the above is wrong