A.16B B.32B C.64B D.128B
A.線路交換方式B.報(bào)文交換方式C.虛電路方式D.數(shù)據(jù)報(bào)方式
A.基于數(shù)據(jù)庫(kù)的EDI B.基于VAN的EDI C.Web-EDI D.基于XML的EDI