A(  )is an independent?firm that offers

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问题 A(  )is an independent?firm that offers connection and transaction-forwarding services to buyers and sellers engaged in EDI.A.WANB.LANC.VPND.VAN

选项 A.WAN
B.LAN
C.VPN
D.VAN

答案 D

解析 本题考查专业英语知识。
参考译文:为买家和卖家从事EDI提供连接和事务转发服务专用增值网络,称为VAN。
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