题目内容

Which is an advantage of using watertight longitudinal divisions in double bottom tanks ().

A. Cuts down free surface effect
B. Increases the rolling period
C. Decreases weight because extra stiffeners are unneeded
D. Lowers the center of buoyancy without decreasing GM

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对炭疸芽孢无效的消毒药是()

A. 含氯石灰
B. 过氧乙酸
C. 苯扎溴铵
D. 溴氯海因
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船舶保安记录在船上：

A. 只能用电子格式保存
B. 只能保存一个航次
C. AB都对
D. AB都错

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Index error of a sextant is primarily caused by ().

A. Improperly correcting the other errors in a sextant
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C. The horizon glass not being parallel to the index mirror
D. Human error in taking a celestial observation

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麻黄、香薷均具有的功效是

A. 既能发散风寒，又能通鼻窍
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C. 既能发散风寒，又能透疹消疮
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Which is an advantage of using watertight longitudinal divisions in double bottom tanks ().

A. Cuts down free surface effect B. Increases the rolling period C. Decreases weight because extra stiffeners are unneeded D. Lowers the center of buoyancy without decreasing GM

对炭疸芽孢无效的消毒药是()

船舶保安记录在船上：

Index error of a sextant is primarily caused by ().

麻黄、香薷均具有的功效是

A. Cuts down free surface effect
B. Increases the rolling period
C. Decreases weight because extra stiffeners are unneeded
D. Lowers the center of buoyancy without decreasing GM