問題詳情
39. 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
參考答案
答案：C
難度：非常困難0
統計：A(2),B(2),C(0),D(0),E(0)
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