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ID:57033147
大小:10.18 MB
页数:19页
时间:2020-07-27
《英语口语课的演讲ppt-手手机的发展课件.ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、theEvolutionofCellphoneBetween1983-2012In1983inventedbyMOTOROLA1stMobilePhone1983MotorolaDynaTAC8000XThefirstcellphoneitweights1.13kilogram.Thefirstgenerationofanalogsignalsitcanbeusedforonlyhalfanhourafterbeenchargingfor10hours。itcost3,995dollars1983-1990Motorola32
2、00ThefirstcommercialcellphoneInchina,wecallitbrick。itweights520gram.nearlyhalfweightoftheformeroneitishugeinsizeandwithaprettylongantennaItmustseemrealoddtousnow,butbackthenthiscellphonewerethecrazeoftheday。thefamousfightchoreographer(洪金宝)isoneofthefirstusersWhenyou
3、`reattacked,itcanbeusedas“brick”.Justthrowit!1983-1990MotorolaProvidedusMotorolaStarTAC1996Thefirstclamshellcellularphone1992ThesecondgenerationdigtalsignalGSM.GSMisstandforGlobalSystemforMobileCommunications.Thiswasthefirstmass-producedGSMphoneNokia1011Nokia9000Com
4、municator1996-2000TheThirdgenerationisTD-SCDMAThefirstsmatphoneseriesDrivenbyanIntel386CPU1.Therecordingradio2.Video3.MusicplayMP3MP4versatility4.Hdcamera5.JAVAallsortsoffunctiongamedownloadsSince2000MUti-MediafunctionswereintergratedintoMediaphones2000-2003SamsungS
5、PH-M100SiemensS45BenefonEsc!itisthefirstmusiccellphonewhichcanstore64mbmusicitisthefistcellphonewithGPRSitisfirstcellphonewithGPSformilitaryuse2003-2006blackberryQuark6210nokiaNgagesonyK790cW800cAfter2006WindowsMobileSymbianOSBlackBerry200720082010wenowhavewindowsph
6、one!!!!!!!!!After2011……After2012projective
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