Thewayofcommunicationinpeople’slifehaschangedalotofinre...
问题详情：Thewayofcommunicationinpeople’slifehaschangedalotofinrecentyears.Inthepast,peoplekeepintouchwitheachothermainlybywritinglettersorusethepublictelephone.Butnowalmosteveryonehaveamobilephone.Peo...