牛津上海版英语九年级上册-Module-2-Unit-4-Computers-课件

Module2Unit4ComputersInthe1940s,thefirstcomputerswerebiggerthancars.Thesenewchairsaremorecomfortablethantheoldones.ThissaysthatacomputerisnotclevererthanIam.Thefirstcomputerswerebuiltinthe1940s.Theywerebiggerthancars!Sincethencomputershavebecomesmallerandsmaller.Desktopcomputersarethesizeoftelevisions.Laptopsarethesizeofbigbooks.Nowwehavepalmtopcomputers.Theyaresmallenoughtoputinyourpocketlikeabarofchocolate.Otherkindsofcomputersaresotinythatyoumaybeunawareofthem.ThereisprobablyoneinsideyourTV,telephone,orwashingmachine.Soyouprobablydependoncomputersmorethanyourealize.ReadPart1andcompletethetable.TopicsentenceSupportingdetailsComputersSizesFirstcomputersDesktopsLaptopsPalmtopsOtherkindsReadPart1andcompletethetable.Wecanusethetopicsentenceandsupportingdetailstoorganizeourwriting.当我们写作文时，要合理使用topicsentence和supportingdetails组织文章结构。AhugecomputerAApalmtopAlaptop它由17468个电子管、6万个电阻器、1万个电容器和6千个开关组成，重达30吨，占地160平方米，耗资45万美元。Part2Closeyourbook,listenandfilltheblankscalculatefasttypeprintoperatingspaceshipsoperaterailways控制铁路系统Computerscanalsodoalotofimportantjobs,suchasoperatingrailwaysandflyingspaceships.Theanswertothisquestionis,forthetimebeing,‘No’.Yourbraincanunderstandthemeaningofthingsbetterandcreatenewideas.However,onedaycomputersmaybeabletodomostthingsthatahumanbraincandoandevendothembetter.Forexample,theymaybebetterthandoctorsatdoingtheirjob.Ifthisistrue,itraisessomeinterestingPart3ReadandanswerthequestionsNo,itisn’t.Becausethehumanbraincanproducenewideasbutcomputerscannot.Thejobofadoctor.Wemayhavenothingtodo.Part3ReadandanswerthequestionsNowyoudonotevenneedtoknowhowtotype.Youcanbuyaprogramwhichhelpsthecomputerrecognizeyourvoice.Youcantalktothecomputeranditwillobeyyourcommands,andwriteyourletters!Readthefourthpartofthepassageandcompletetheflowchart.Readthefourthpartofthepassageandcompletetheflowchart.First,next,afterthat,then,finally…Manyoftoday’scomputershaveCD-ROMorDVD-ROMdrives.ADVD-ROMcanholdmillionsofpagesofwriting,andcanalsocontainpictures,videosandsounds.Forexample,youcanuseyourcomputertoreadaboutafamouspersonfromhistoryandyoucanseeaphotographorvideoofhimorher,andevenlistentothemspeaking.SomepeoplethinkthatDVD-ROMswillsoonbemorepopularthanbooks.ReadPart5andanswer:ReadPart5andanswer:HowmanypagesofwritingcanaDVD-ROMhold?___________________________Itcanholdmillionsofpagesofwriting.ComputerfactssizesusesrelationshipInthe1940s&Nowadayscalculatetypeanddrawotherimportantjobscleverer?thefuture?Reviewexposition(说明文)ComputerfactssizesusesrelationshipInthe1940s:biggerNowadays:smallerandbettertiny,beunawareof,dependoncalculateatafasterspeedtypeanddrawotherimportantjobs:operaterailwayand....cleverer:producenewideas,beableto,bebetteratthefuture:happento,havenothingtodo,changeourlivesRetellingInadditionbeunawareofawaremeansrealize没意识到；没察觉她走路很安静，大家都没意识到她来了。Shewalkedsoquietlythateveryone____________________hercoming.wasunawareofNotesNotesunawareun-:不开心：不开心：happyunhappy=un+awaredependon依靠=relyon;counton你不能永远依赖你的父母。Youcan't_____________yourparentsforever.dependonYoudependoncomputersmorethanyourealize.你对电脑的依赖远超过你的认知.NotesNotes