97免费在线观看视频,亚洲综合自拍网,黄色毛片免费观看,热久久综合网,免费看日产一区二区三区狠狠操av,久久久涩涩涩,在线精品免费视频,人人插天天干,久久91精品国产91久久

<strong id="rt1dx"><meter id="rt1dx"></meter></strong><acronym id="rt1dx"></acronym>

<nobr id="rt1dx"></nobr>

單項(xiàng)選擇題

A ship is inclined at an angle of loll. In the absence of external forces，the righting arm (GZ) is（）.

A.positive
B.negative
C.zero
D.vertical

你可能感興趣的試題

單項(xiàng)選擇題

A partially full tank causes a virtual rise in the height of the（）.

A.metacenter
B.center of buoyancy
C.center of flotation
D.center of gravity

單項(xiàng)選擇題

A neutral equilibrium position for a vessel means that the metacenter is（）.

A.lower than the keel
B.at the same height as the center of gravity
C.exactly at midships
D.at the center of the waterplane area

<acronym id="fowpl"></acronym>

<thead id="fowpl"></thead>

<th id="fowpl"></th><progress id="fowpl"></progress>

<progress id="fowpl"><menu id="fowpl"></menu></progress>