As soon as you hear the fire and emergency signal, you should ensure that the （）.<br>A:ring buoys are thrown overboard<br>B:engines are stopped<br>C:fire pumps are started<br>D:life preservers have been issued to everyone

As soon as you hear the fire and emergency signal, you should ensure that the （）.
A:ring buoys are thrown overboard
B:engines are stopped
C:fire pumps are started
D:life preservers have been issued to everyone

出自：海船船员证

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