单项选择题
If the weights are concentrated in the middle part, then（）will happen on board the ship.
A.hogging B.stiffness C.sagging D.listing
单项选择题 I’ll ask the foreman and see（）he’ll agree.
单项选择题 In ballast means that the ship is（）.
单项选择题 In hat h No.3 the cargo（）bulk is peaked.
