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全部科目 > 水路交通运输技能考试 > 海船船员考试 > 船舶管理(驾驶专业) > 航海英语 > 船舶操纵 > 狭水道、冰区与运河航行

单项选择题

A tug’s horsepower available at the shaft is（）.

A.indicated horsepower
B.brake horsepower
C.dynamic horsepower
D.net horsepower

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A towing vessel should be on the crest of a wave at the same time as its tow and in the trough at the same time. The term used to describe this is（）.

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