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The signal for a fire emergency on an OSV is（）.

单选题
2022-01-04 11:24
A、a 30 second on 30 second off alternating signal
B、the continuous blast of the ships whistle for not less than 10 seconds supplemented by the continuous ringing of the general alarm bells for not less than 10 seconds
C、an intermittent ringing of the general alarm for not less than ten seconds
D、announced over the PA system
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正确答案
B
试题解析
标签： 紧急通信
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