单项选择题
（）A room on or near the bridge provided with the necessary fittings and furniture for the handling and stowage of charts and where the chronometers are placed.
A.Captains cabin B.Chief officer;s locker C.Chartroom D.Pilots cabin
单项选择题 （）The main center-line structural member, running fore and aft along the bottom of a ship, sometimes referred to as the backbone.
单项选择题 （）are to be used for dunnage if you load rice.
单项选择题 （）is known as a long hatch during loading operation.
