单项选择题
A.It causes minimal damage
B.It is safer for personnel
C.It is cheaper
D.It is most effective on a per unit basis
单项选择题 A ROUND THROUGH THE VESSEL CARRIED OUT BY A CREW MEMBER OF THE WATCH AT CERTAIN INTERVALS SO THAT AN OUTBREAK OF FIRE MAY BE PROMPTLY DETECTED defines（）.
单项选择题 Ordnance exercise is（）.
单项选择题 I’m on fire and have dangerous cargo on board.The most emergent assistance in this case would be（）.