問題詳情

22.Receiving point means a mark or place at which a vessel comes under __________ entry, transit,or escort procedure.
(A)compulsory
(B)mandatory
(C)obligatory
(D)designed

參考答案

答案：C
難度：適中0.666667
統計：A(2),B(7),C(20),D(1),E(0)