A sound signal of seven short blasts and one long blast given with the vessel’s sound system is（）.<br>A:Safety alarm<br>B:Distress alarm<br>C:Fire drill alarm<br>D:General emergency alarm

A sound signal of seven short blasts and one long blast given with the vessel’s sound system is（）.
A:Safety alarm
B:Distress alarm
C:Fire drill alarm
D:General emergency alarm

出自：海船船员证

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