A、A.Inefficient scavenging；twice
B、B.Inefficient scavenging；1~8 times
C、C.Fewer strokes in a circle；twice
D、D.Fewer strokes in a circle；1~8 times
更多“（）is the main reason that reduces the power advantage of a two-stroke engine over a same size four-stroke one to about（）”相关的问题
A、the rotate speed fluctuation B、the ventilation tube clogged C、the main engine accelerate so fast D、stormy waves
A、The main body of a vessel is the hull. B、The main body of a vessel is the superstructure. C、The main body of a vessel is the engine room. D、The main body of a vessel is the poop.
A、a margin of safety is provided should the line part B、the towline will wear more evenly C、there will be less stress on the towline D、a slight increase in speed will be realized
A、Keep the wire soft and manageable B、Lubricate the inner wires and prevent wear C、Prevent kinking D、Prevent rotting
A、prevent the diesel engine surging B、prevent governor from being damaged because of swing C、reduce the probability of the crank shaft being torsional vibrated and resonated D、prevent the main engine being overload or overspeed
A、Should the engine stop without apparent reason B、The engine should stop without apparent reason C、The engine stops without apparent reason D、The engine is stopped without apparent reason
A、The deck below the lower deck is known as ‘tween deck. B、The deck below the main deck is known as ‘tween deck. C、The deck above the main deck is known as ‘tween deck. D、The deck below the lower deck is known as main deck.
A、The deck is divided into forecastle deck, main deck and poop deck. B、The deck is divided into forecastle deck, lower deck and main deck. C、The deck is divided into forecastle deck, main deck and lower deck. D、The deck is divided into main deck, lower deck and poop deck.
A、The motion of the apparent sun is along the ecliptic B、Measurement of time is along the celestial equator C、The speed of the Earth's revolution is not constant D、There are variations in the Earth's rotational speed
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