单项选择题
A.permitted for drawing fuel samples
B.permitted for draining fuel from lines
C.permitted for bleeding air from lines
D.prohibited
单项选择题 Many dangerous cargoes are stowed on deck because of the（）.
单项选择题 It is generally NOT allowed to clean up an oil spill by using（）.
单项选择题 If your asphalt barge has operated more than 12 months in saltwater in the 24 month period since it was last dry-docked，when is it required to be hauled out again? （）