单项选择题
The angular motion of a ship in the athwartship is termed（）.
A.pitching B.yawing C.rolling D.tracking
单项选择题 That center around which a vessel trims is called the（）.
单项选择题 Semisubmersibles A and B are identical. However，A is more tender than B. This means that A relative to B has a（）.
单项选择题 Progressive flooding may be indicated by（）.
