高中英语 Unit 3《Computers》Warming up and Reading教案 新人教版必修2.docx
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高中英语 Unit 3《Computers》Warming up and Reading教案 新人教版必修2.docx
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高中英语Unit3《Computers》WarmingupandReading教案新人教版必修2
2019-2020年高中英语Unit3《puters》WarmingupandReading教案新人教版必修2
Totalkaboutputer
Toreadaboutputer
Procedures
I.Warmingup
Warmingupbytalkingaboutputer
Lookatthepicturesonpage17.Whatarethey?
Whatdotheyhaveinmon?
Yes,theyareputers.Thenwhatisaputer?
Aputerisamachinewhichstoresknowledgeinitsmemoryanddoescalculationsonthatknowledge.Thisknowledgeisstoredinsymbols;itiscalleddata.Aputerusuallyhasamonitortoshowresults.However,someputerscanspeak;theseputerscanbeusedforvoicemail.
计算机室
Aputerfrequentlyrequiresabootdevice.Thebootdevicecontainstheputer’soperatingsystemanddata.puterprogramscanbeinstalledontoaputer.SomepeoplethinkthatputersarelessusefuliftheydonothaveaccesstotheInternet.TheythinkthisbecausetheInternetallowstheputerstosendandreceivedataandemailacrosstheworld.
曙光3000巨型计算机
Aputerisnowalmostalwaysanelectronicdevice.Itusuallycontainsmaterialswhicharetoxic;thesematerialswillbeetoxicwastewhendisposedof.Whenanewputerispurchasedinsomeplaces,lawsrequirethatthecostofitswastemanagementmustalsobepaidfor.Thisiscalledproductstewardship.
Insomecountriesoldputersarerecycled(melteddown)togetgoldandothermetals.Thisisdangerous,becausethisprocedurereleasesthetoxicwasteintothewaterandsoil.
putersbeeobsoletequickly.Veryoftentheyaregivenawayandnewonesreplacethemwithintwoorthreeyears.Thismakestheproblemworse.puterrecyclingisthusmon.Manyprojectstrytosendworkingputerstodevelopingnationssotheycanbere-usedandwillnotbeewasteasquickly.
puterjargon计算机行话
puterjargonmeanswordstodowithputersandsurroundingtopics.Knowingwhatthesewordsmeancanhelpyouknowmoreaboutputers.Somepeopleusethesewordstoimpressotherpeople(Alsoknownasbuzzwords).
Examplesofjargon:
Bit-Thesmallestdataunit,caneitherbea“0.”ora“1.”.
Byte-unitofdata.SeealsoKilobyte,Megabyte,GigabyteandNibble
CPU–CentralProcessingUnit,Anothernameforprocessor
Data-Informationstoredonaputer
Disk-Aplacetostoredata.
Email-Electronicmail.
GHz-Gigahertz.Usedoftenincorrectlytodescribethespeedofaprocessor.Butwithsome2.4GHzprocessorsfasterthan3.6GHzones,itisclearthatitisjustasalesmantrick.
Load-Getdatafromadisk
Nibble-HalfaByte
Save-Putdataonadisk
RAM–random-accessmemory(随机存取存储器),themorethebetter.
USB-UniversalSerialBus(通用串行总线,一种简化了插接多种附件的薄型插座)
-WorldWideWeb,partoftheInternet
II.Pre-reading
1.QuestioningandansweringWhatdoyouknowaboutputer?
●Electronicmachinecapableofperformingcalculationsandothermanipulationsofvarioustypesofdata,underthecontrolofastoredsetofinstructions.Themachineitselfisthehardware;theinstructionsaretheprogramorsoftware.Dependinguponsize,putersarecalledmainframes,miniputers,andmicroputers.Microputersincludedesk-topandportablepersonalputers.
●Amulti-functionelectronicdevicethatcanexecuteinstructionstoperformatask.
●Adevicethatacceptsinformation,processesit,andsuppliesanoutput.Aputerusuallycontainsmemory,acontrolunit,arithmeticandlogicalunits,andameansforinputandoutput.
●aprogrammablehardwareponentthatiscontrolledbyinternallystoredprogramsandthatcanperformsubstantialputations(includingarithmeticandlogicoperations)withouthumanintervention.Aputertypicallyconsistsofoneormoreprocessingunits,memoryunits,andassociatedperipheralinputandoutputdevices.
●Relatedtoautomationandelectronicdataprocessing.TheLibraryofCongressmonlyclassesmostputer-relatedbooksinHF5548,QA75-76,Z52,T385,andsomeTKranges.
●amachineforperformingcalculationsautomatically
calculator:
anexpertatcalculation(oratoperatingcalculatingmachines)
●Aputerisadeviceormachineformakingcalculationsorcontrollingoperationsthatareexpressibleinnumericalorlogicalterms.putersareconstructedfromponentsthatperformsimplewell-definedfunctions.Theplexinteractionsoftheseponentsendowputerswiththeabilitytoprocessinformation.Ifcorrectlyconfigured(usuallyby,programming)aputercanbemadetorepresentsomeaspectofaproblemorpartofasystem.Ifaputerconfiguredinthiswayisgive
2.DiscussingandsharingHowhaveputerschangedourlives?
Somedaysoon,ifyouhaven’talready,you’relikelytoplugintotheputernetworknationgrowinginourmidst.puterterminals,orsmallputersconnectedviamodem(amodulator/demodulatorcircuitforencoding/decodingputerchatter)toordinarytelephonelines,shouldbeasubiquitousasthetelephoneitself.They’reamuchmoreusefulandhumanetoolthanthephone,andwithcorporateAmericabehindthemthenetworkswillbeeverywhere----changingourlivesmorethananytechnologysincetheautomobile.
Joiningaputernetworkisthesameasjoiningamunity.Smallsystemsarelikevillages,wherenewmembersareformallyweled.Thelargernetworks,theSourceandpuServe,forexample,arecities-anonymous,fulloflifeandevents,butdifficulttofitinto.
III.Reading
1.ListeningandreadingtotherecordingofthetextWHOAMI?
Turntopage18andlistenandreadtotherecordingofthetext.Payattentiontothepauses,pronunciationandintonationofthenativereader.
2.Readingaloudandunderliningexpressions
Nowwearetoreadthetextonceagainandunderlinealltheexpressionsinthetext.Putthemdownintoyournotebookafterclassashomework.
CollocationsfromWHOAMI?
beginas…,acalculatingmachine,bebuiltas…,atthattime,atechnologicalrevolution,thestartofartificialintelligence,writeabook,bemadetowork,solveproblems,fromthenon,growanylarger,Astimewentby,gobackto…,bemadesmaller,memorybecamesolarge,standtherebyoneself,beconnectedby…,shareknowledgewithothersthrough…,beputinto…,providehumanswith…,dealwith…,trulyfilledwith…
3.Reading,identifyingandsettling
Attention,please!
Itistimetoskimthetextonemoretimeandidentifythedifficultsentences.Tryanalyzingthestructuresofthedifficultsentencesanddiscussthemamongyourgroupmembers.Youmayalsoputyourquestionstomeforhelp.
Chat(online)(在线)聊天
Tochatistotalkaboutordinarythingsthatarenotveryimportant.Youcanchattoonepersonortomanypeople.PeoplealsousethiswordnowforpartsoftheInternetwherewecantalkwithmanydifferentpeopleatthesametime.Usually,youchatontheinternetinachatroomormessagingservicelikeAOL(AmericanOn-Line)InstantMessenger(AIM),YahooMessenger,orMSNMessenger.
IV.prehending
1.Scanthetextforinformationtopletethetablebelow,describingthedevelopmentofputer.
In1642
Theputerbeganasacalculatingmachine.
In1822
TheanalyticalmachinewasmadebyCharlesBabbage.
In1936
Theputergrewrapidlybothinsizeand
inbrainpower.
1940s
Theputerhadgrownaslargeasaroom.
In1960s
Thefirstfamilyofputerwasconnectedtoeachother.
In1970s
puterswereusedinofficesandhomes.
Now
putersconnectpeopleallovertheworld
Together.
2.Readthetextagainandpletethechartbelow.
Paragraph1
Paragraph2
Paragraph3
Topicsentence
OvertimeIhave
beenchangedquite
alot.
Thesechangesonly
becamepossible
asmymemory
improved.
Sincethe1970s
manynewapplications
havebeenfoundforme.
Supportingdetails
●Calculatingmachine
●Analyticalmachine
●Universalmachine
●PC
●laptop
●tubes
●transistors
●chips
●network
●worldwideweb
●munications
●finance
●trade
●robots
●mobilephones
●spacerockets
●providingalifeof
highquality
Period2:
LearningaboutLanguage
TeachingAims:
TolearntouseThePresentPerfectPassiveVoice
Todiscoverusefulwordsandexpression
Todiscoverusefulstructures
Procedures
I.Warmingupbyreadingtothetape
Tobeginwith,turntopage18,listeningtoandreadingtotherecordingofthetextWHOAMI?
Attentiongoestothepausesandintonation,aswellasthepronunciationofthereader.
II.Discoveringusefulwordsandexpressions
Inpairsdotheexercises1,2and3onpages20.Youmustfinishthemin10minutes.
III.Learningaboutgrammar
1.PassiveVoice—Overview
TenseorModel
PassiveSentence
SimplePresent
TheTOEFLexamisgiveneverysixmonths.
Simplepast
TheTOEFLexamwasgivenlastmonth.
SimpleFuture
TheTOEFLexamthisyearwillbegivenonOctober15.
PresentContinuous
TheTOEFLexamisbeinggiveneveryyear.
Presentperfect
TheTOEFLexamhasbeengiveneveryyearsince1950.
Pastperfect
TheTOEFLexamhadbeengivenbeforetheVietnamWaroccurred.
SimpleModal
TheTOEFLexamshouldbegiventoeveryForeignstudent.
PastModal
TheTOEFLexamshouldhavebeengiventoalltoenterUScolleges.
2.ThePresentPerfectPassiveVoice
ThestructureofThePresentPerfectPassiveVoiceis:
have/has+been+~ed
IV.Readingaloudanddiscovering
Nowgobacktopage18toreadaloudanddiscoverinthetextexamplesofThePresentPerfectPassiveVoice.
…asalaptop,Ihavebeenusedinofficesandhomessincethe1970s.
Sincethe1970smanynewapplicationshavebeenfoundforme.
V.Discoveringusefulstructure
Weshalldogrammarexercises1,2and3onpage21.
VI.Closingdownbydoingaquiz
Correctthemistakesinthesepassivevoicesentences
Example:
Thehousewasbuildin1880.(correct=Thehousewasbuiltin1880.)
1.3000employeeswerelayingoff.
2.Astorywillmade
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