A. for useB. to useC. in useD. of useAre all hoses and ……

单项选择题The foam extinguisher should be used （）.

A. in the end
B. upside down
C. down side
D. on top

单项选择题A fire extinguisher is used for （）fires.

A. stopping
B. putting out
C. putting
D. finishing

单项选择题Who is in charge of oil spilling ? （）

A. Second officer.
B. Third officer.
C. Captain.
D. Bosun.

单项选择题Lifeboat launching is operated （）.

A.quarterly
B.annually
C.monthly
D.yearly

单项选择题NO.2 lifeboat is located on （）side.

A.starboard
B.both
C.each
D.port