阿摩線上測驗
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
答案：登入後查看
統計： A(123), B(92), C(308), D(30), E(0) #2051849
統計： A(123), B(92), C(308), D(30), E(0) #2051849
