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

單項選擇題

If the result of loading a vessel is an increase in the height of the center of gravity,there will always be an increase in the().

A.metacentric height
B.righting arm
C.righting moment
D.vertical moment

微信掃碼免費搜題