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

（）The main center-line structural member, running fore and aft along the bottom of a ship, sometimes referred to as the backbone.

A.Frame
B.Deckbeam
C.Stringer
D.Keel

你可能感興趣的試題

單項(xiàng)選擇題

（）are to be used for dunnage if you load rice.

A.Wooden planks
B.Rush mats
C.Steel bars
D.Wooden planks and rush mats

單項(xiàng)選擇題

（）is known as a long hatch during loading operation.

A.The largest hatch of a ship
B.The hatch that is double rigged
C.The hatch where a disproportionate amount of cargo is atowed
D.The hatch where the most cargo is stowed