AT&T和Verizon 兩家在無線市場是事實上的壟斷叫duopoly (vs monopoly) 看看裏麵的link

來源: 大大V 於 2014-10-29 11:58:16 [舊帖] [給我悄悄話] 本文已被閱讀：次

www.thesimpledollar.com/verizon/

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AT&T和Verizon 兩家在無線市場是事實上的壟斷 叫duopoly (vs monopoly) 看看裏麵的link