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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 > 船舶及其结构 > 船舶浮性

单项选择题

The magnitude of a moment is the product of the force and（）.

A.time
B.lever arm
C.displacement
D.angle of inclination

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