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

()is the tendency of a vessel to return to its original position after it is displaced therefrom.

A.Inclining moment
B.Stability
C.Shearing force
D.Bending moment

微信掃碼免費(fèi)搜題