单项选择题 （）contains the wheelhouse with the control station,the chartroom where charts,pilot books and publications are kept,and the radio room.

单项选择题 Longitudinal and transverse separtions between the tanks,which are used to prevent liquids from leaking from one double bottom tank into the other ,are called（）.

单项选择题 （）provides strength and strong space for fule,lubricating oil,fresh water,salt(ballast)water and potable water.