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点评
eric6886886
铁路是垄断,三个运营商也是垄断么?银行有啥投入了?无非就是房租、工资、不动产几个大的;运营商从2000年到现在移动技术换了几代了?宽带速率从几十k到现在的千兆,机房换多少代设备,用户端换多少代设备?提速了反
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