单项选择题
The deadweight of a bulk carrier consists of（）.
A.the weight of the ship's structure and its machinery B.bunker and other consumable loads C.ballast loads D.all those weights，such as the weight of the bunkers，ballast，provisions and cargo
单项选择题 The extension of the after part of the keel in a single-screw vessel upon which the stern post rests is called the（）.
单项选择题 For existing ships，（）is not an improvement to safety.
单项选择题 Floors aboard ship are（）.
