单项选择题

扔给他救生圈，并帮他上船。（）

A. Release a life-jacket and help him come on board.
B. Releasing lifebuoy and help him come on board.
C. Throw him a lifebuoy and help him come on board.
D. Release a life-raft and help him come on board.

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A. Close all fire doors and use the dry powder extinguisher.
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