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A message by flashing light consists of the call，the text，the ending，and the（）.
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A message by flashing light consists of the call，the text，the ending，and the（）.
A、identity
B、time of origin
C、reply
D、procedure code
时间：2022-01-08 11:18
关键词：
海上通信基本知识
答案解析
A
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