A、decrease until the engine speed increases
B、increase as the load increases
C、decrease as the load
D、increases remain unchanged
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A、A.twice the crankshaft speed B、B.half the crankshaft speed C、C.the same speed as that of the crankshaft D、D.a speed independent of that of the crankshaft
A、A.be large enough to be readily apparent B、B.be a succession of small alterations C、C.be with due regard to the power and speed of the vessel D、D.leave sufficient room for the other vessel to take action
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