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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

The frequency 518KHZ will be used to transmit（）and（）wanings in NAVTEX.

A.navigational / typhoon
B.traffic / meteorological
C.marine / hurricane
D.navigational / meteorological

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