无码高清视频|成人自拍视频|欧美成人午夜无码A片秀色直播|草美女视频网站|美女被操网站在线观看

單項(xiàng)選擇題

For a floating vessel,the result of subtracting KG from KM is the().

A.height of the metacenter
B.height of the righting arm
C.height of the center of buoyancy
D.metacentric height

微信掃碼免費(fèi)搜題