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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 > 航海学 > 地文航海

单项选择题

A buoy having red and green horizontal bands would have a light characteristic of（）.

A.interrupted quick flashing
B.composite group flashing
C.Morse (A)
D.quick flashing

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