单项选择题
The machinery associated with heaving in and running out anchor chain is the（）.
A.winch B.windlass C.draw works D.dynamic pay out system
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（）.
单项选择题 The antennas of the trucks on deck are not fitted（）.
