单项选择题
The opening in the deck beneath the anchor windlass that leads to the chain locker is the（）.
A.hawse pipe B.fall pipe C.drop-pipe D.spill pipe
单项选择题 The machinery associated with heaving in and running out anchor chain is the（）.
单项选择题 The joint of the riser in a marine riser system that compensates for heave，the up-and-down motion of a floater，is the（）.
单项选择题 The athwartship hull structural members of a ship are（）.
