单项选择题
A.twice the crankshaft speed
B.half the crankshaft speed
C.the same speed as that of the crankshaft
D.a speed independent of that of the crankshaft
单项选择题 A restricted air intake to a diesel engine may result in the engine （）.
单项选择题 Temperature control valves installed in the jacket cooling water system of a diesel engine modulates the rate of water flow through the （）.
单项选择题 Cylinder lubrication oil for low speed main propulsion diesel engines is admitted to each cylinder during （）.