阿摩線上測驗
27. Reference line is a line _____ on the radar screens in VTS Centers and/or electronic seacharts separating the fairway for inbound and outbound vessels so that they can safely pass each other.
(A) disappeared
(B) appearance
(C) displayed
(D) setting
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統計： A(10), B(25), C(275), D(28), E(0) #3351419
統計： A(10), B(25), C(275), D(28), E(0) #3351419
