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全部科目 > 水路交通运输技能考试 > 海船船员考试 > 船舶管理(驾驶专业) > 航海英语 > 海上通信 > GMDSS

单项选择题

In the GMDSS, distress alerting can be transmitted in（）directions.

A.1
B.2
C.3
D.4

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