单项选择题
A.the dangerous semicircle
B.the eye (center) of the storm
C.that half of the storm lying to the right of the storm's path
D.that half of the storm lying to the left of the storm's path
单项选择题 Following a collision or accident，the Master of each vessel involved must render assistance to persons affected by the collision or accident（）.
单项选择题 Each hose in the fuel transfer system for helicopter refueling must have a（）.
单项选择题 During storm conditions on a vessel，the mooring tensions should be adjusted so that（）.