单项选择题
0f the following, the most important consideration for a tank vessel is（）.
A.GM B.the vertical center of gravity C.the longitudinal center of gravity D.the stress on the hull
单项选择题 0f the general methods of stowing bagged cargo, which allows maximum ventilation?（）.
单项选择题 0il product samples should be taken from the（）.
单项选择题 0n a single-screw vessel the stern frame（）.
