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A twin-screw vessel can clear the inboard propeller and maneuver off a pier best by holding a(n)（）.
A:forward spring line and going slow ahead on the inboard engine
B:after spring line and going slow astern on the outboard engine
C:forward spring line and going slow ahead on both engines
D:forward spring line and going slow ahead on the outboard engine

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出自：海船船员证

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