题目内容

Most hydraulic steering gears are fitted with relief valves which()

A. function when the rudder is amidships
B. relieve excess whip pressure from the hydraulic oil system
C. protect the piping assembly from external rudder shock
D. relieve excessive telemotor pressure

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The Vessel Bridge-to-Bridge Radiotelephone Act applies to which towboat?()

A 100 GT towboat,24 feet in length
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A. 具体化
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D. 通俗化

在使用电子邮件时,及时回复Email十分重要,一般回复时间不宜超过()。

A. 2小时
B. 12小时
C. 24小时
D. 48小时

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