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- 问题详情：Peopleusedtocommunicatewitheachotherthroughlettersandpublicphones.Sonowadaystheyusemobile phonesandtheInternetinsteadof.Thischangeincommunicationhavegoodeffectsonourworksandlife. Comparingwithlettersandpublicphones,mobilephonesandtheInterne...
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