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单选题
船在各种装载情况下,能浮于水中并保持一定的首、尾吃水和干舷的能力叫()。
A
稳性
B
抗沉性
C
浮性
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单选题Bourdon Tube is probably the most commonly used () measuring instrument.A
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叶根圆/压力面2R/3或0.7R处螺距B
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a commercial ship-to-ship channelB
the last frequency that was usedC
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