单项选择题
When the（）is large, the ship is stiff; and when it is small, she is tender.
A.GM B.free surface C.longitudinal center of gravity D.transverse center of gravity
单项选择题 When the ship causes oil pollution to the port, she will be（）.
单项选择题 Which is the winter load waterline on the load waterline mark?（）.
单项选择题 Which of the followings best indicates how many tons of cargo a vessel can carry?（）.
