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試卷名稱：108年 - 108年第三次交通部航海人員測驗-船舶通訊與航海英文#78477
年份：108年
科目：船舶通訊與航海英文(概要)
39. Please refer to the chart as attached and answer the following three questions. The symbol at Q2 means: 
(A) Obstruction or danger to navigation the exact nature of which is specified
(B) Obstruction or danger to navigation the exact nature of which is not specified
(C) Obstruction, depth know
(D) Obstruction, depth un-know
