单项选择题
A. in the end B. upside down C. down side D. on top
A fire extinguisher is used for （）fires.A. stoppingB. p...
单项选择题A fire extinguisher is used for （）fires.
A. stopping B. putting out C. putting D. finishing
Who is in charge of oil spilling ? （）A. Second officer....
单项选择题Who is in charge of oil spilling ? （）
A. Second officer. B. Third officer. C. Captain. D. Bosun.
Lifeboat launching is operated （）.A.quarterlyB.annually...
单项选择题Lifeboat launching is operated （）.
A.quarterly B.annually C.monthly D.yearly
