阿摩線上測驗
22. What is the abbreviation of IBS for navigational system?
(A) International Bridge System.
(B) Integrated Bridge System.
(C) International Boarding System.
(D) Interlock Bridge System.
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統計： A(7), B(21), C(8), D(0), E(0) #3279044
統計： A(7), B(21), C(8), D(0), E(0) #3279044
