单项选择题
A.Refuse to accept the barge until all wing voids are dry
B.Accept the barge and when weather conditions permit run with the wing voids open to ventilate the spaces
C.Accept the barge and periodically check the wing voids
D.Return the barge to the fleet and depart without the barge
单项选择题 You are entering an east coast port and see a buoy with a yellow triangle painted on it.This indicates（）.
单项选择题 You are drifting in a locale where there is no current．As a rule，your vessel will lie（）.
单项选择题 You are approaching a vertical lift bridge.You know the span is fully open when（）.