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问题() is exactly analogous to a marketplace on the Internet.A.E-Commerce B.E-Cash C.E-Mail D
()isexactlyanalogoustoamarketplaceontheInternet.A.E-CommerceB.E-CashC.E-MailD.E-Consumer
()isexactlyanalogoustoamarketplaceontheInternet.A.E-CommerceB.E-CashC.E-MailD.E-Consumer