单项选择题

In ship construction, frame spacing is（）.

A.greater at the bow and stern
B.reduced at the bow and stern
C.uniform over the length of the vessel
D.uniform over the length of the vessel, with the exception of the machinery spaces, where it is reduced due to increased stresses

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In the absence of external forces, adding weight on one side of a floating vessel causes the vessel to（）.

A.heel until the angle of loll is reached
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单项选择题

In the absence of external forces, the center of gravity of a floating vessel is located directly above the（）.

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D.geometric center of the displaced volume