谁知道AD,DDD,BC,CAAC,NAB这些英文缩写的意思啊,急!答:BC = Basic Control mode,基本控制方式 = Binary Code, 二进制(代)码 = Binary Counter, 二进制计数器 = Bit Clock (3704), 比特时钟 = Board of Control, 控制板,控制盘 = Branch Concentrator, 【PFA】分行集线器[集中处理 机]BC n.公元前 CAAC =Civil Aviation Administration of China (...