单项选择题

A fire extinguisher is used for （）fires.

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

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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

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