高中英语 Unit3 Computers课件 新人教版必修2.ppt

unit3computers apc personalcomputer anotebookcomputer twokindsofcomputerswidelyused iamveryoldnow iwasborninchina manypeopleusedmeforcalculatinginthepast butnowiamabitlonelybecausetheydon tlikemenow doyouknowwhoiam abacus riddles 谜语 iamverysmall icanbeusedforcalculating inchina alotofstudentsusemewhensolvingmathematicalproblems doyouknowwhoiam calculator riddles 谜语 icanbeusedforcalculating besides icanalsobeusedforwatchingdvd sendinge mailandcommunicatingthroughtheinternet however iamnotapc becausei msmallenoughforyoutotakemewithyou notebook laptop doyouknowwhoiam riddles 谜语 ahugecomputer apc thehistoryofthecomputer pda palmtop discussion whatcanweusecomputertodo workoutalistandcompareitwithyourpartner internet sendemails playgames communicatewithmyfriends gatherinformationformylessons listentomusic watchmovies doshoppingonline reading whoami howmuchdoyouknowaboutacomputer picturesandwords 1 2 4 3 5 6 1 monitor2 screen3 cd rom4 mouse5 keyboard6 harddisk labeleachpart themaindevicethatacomputerusestostoreinformation thepartofacomputerthatstoresinformation 1 modem 2 scanner 3 printer 4 chips 5 cpu 5 3 1 2 4 devicelinkingacomputerwithatelephoneline 1 whoisthetellerofthestory 2 whatdoesthepassagemainlytalkabout computer ittalksaboutthehistoryandtheapplications use ofcomputers fastreading skimming listentothetapeandanswerthefollowingquestions 3 inwhichorderisthetextorganized time timeline 1642 1822 theanalyticalmachinewasmadebycharlesbabbage 1940s thefirstfamilyofcomputerswasconnectedtoeachother 1970s now thecomputerbeganasacalculatingmachine thecomputergrewrapidlybothinsizeandinbrainpower computerswereusedinofficesandhomes computersconnectpeopleallovertheworldtogether 1936 thecomputerhadgrownaslargeasaroom 1960s para 1 topicsentence supportingdetails overtimeihavechangedquitealot calculatingmachine analyticalmachine universalmachine pc laptop ahugecomputer para 2 topicsentence supportingdetails tubes thesechangesonlybecamepossibleasmymemoryimproved transistors chips network worldwideweb intelligentbutlonely para 3 topicsentence supportingdetails communicationsfinance sincethe1970smanynewapplicationshavebeenfoundforme trade robots mobilephones medicaloperations spacerockets providingalifeofhighquality howdidcomputerchangeinitssize intelligence speed function andhowaboutpeople sopinion size intelligence speed function people sopinion smaller quicker cleverer dealingwith communicatingwith clever useful calculating simple minded virtualkeyboards虚拟键盘 nose topkeyboard vest whatcanthefuturecomputerbelike whatcanwedobycomputerinthefuture discussion youaregivenachancetodesignacomputer