A.C2G(Customer to Government) B.C2C(Customer to Customer) C.G2G(Government to Government) D.C2B(Customer to Business)
A.GOV B.ORG C.COM D.NET
A.全社會增值 B.促進知識經(jīng)濟的發(fā)展 C.新興行業(yè)出現(xiàn) D.減少投資