A.C2C(Customer-to-Customer) B.C2B(Customer-to-Business) C.B2C(Business-to-Customer) D.B2B(Business-to-Business)
A.郵件正文內(nèi)容B.收件人的Email地址C.郵件發(fā)送日期和時(shí)間D.附件
A.可在BBS上發(fā)表自己對(duì)時(shí)事的看法B.Skype能與好朋友實(shí)時(shí)語(yǔ)音通訊C.透過(guò)VoIP可在網(wǎng)絡(luò)上看電影和聽(tīng)音樂(lè)D.可以在Google Maps中看到住家附近的景色