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船舶通訊與航海英文(概要)題庫下載題庫

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17.The communication cost of Inmarsat-C “TELEX” was charged by _____ in ordinary case.
(A)air time by unit: minute
(B)air time by unit: second
(C)bits or alphabet
(D)Internet service provider


17.The communication cost of Inmarsat-C ..-阿摩線上測驗