单项选择题
Gross tonnage indicates the vessel’s（）.
A.displacement in metric tons B.total weight including cargo C.volume in cubic feet D.the volume of the enclosed space
单项选择题 Grinding to eliminate shallow surface defects should be done（）.
单项选择题 Fuel oil tank vents are fitted with a screen which will stop（）.
单项选择题 Freeboard is measured from the upper edge of the（）.
