PAGEPAGE4第頁章序名稱Book5Unit7周次第11周4授課時間年月日至年月日教學(xué)目的要求(1)Rhetoricalskill:featuresoftypicalexposition(2)Keylanguage&grammarpoints(3)Writingstrategies:exemplification(4)Theme:“quizandanswer”—tosolveaFermiproblem教學(xué)重點1.theusingofthenewwordsandexpressions2.thecomprehensionofthetextandthestructuralanalysisofthetext教學(xué)難點thewritingstrategiesofthetext教學(xué)場所環(huán)境classroom授課方式課堂講授（√）；實驗（）；實踐（）；雙語（√）課時分配2學(xué)時教學(xué)方法課堂講授、小組討論、問題法教學(xué)手段網(wǎng)絡(luò)教學(xué)（）；多媒體（√）教學(xué)用具blackboard教學(xué)內(nèi)容提要備注Review（5mins）Cananyonesummarizethefirstpartwelearnedlasttime?Thefirstdivision,whichconsistsofthefirstfiveparagraphs,istheintroductorypartthatprovidesthebackgroundoftheessay.Inthispartthewriterdescribestheone-questionquizthathehasdesigned,pointsoutthreedifferentapproachestothesolutionwiththethirdoneleadingtothecorrectanswer,andmentionstheresultofthequiz.DetailedstudyofthetextParagraph6Q:Whyissmartguessinguniversallyapplicable?A:Smartguessinghasmuchtodowithbusinessorcreativity.Intherealworld,wefrequentlyneedtomakedecisionswhenfullinformationisnotavailable.Fromwhatfoodsweeat,tohowtoraiseourkids,wemustthinkcreativelyforourselves.Wearenotalwaysinapositiontomaketheexactlyrightdecision.Ourbestguess,i.e.thebestapproximationwilloftenbethebestwecando.Languagework:“Yourbestguesswilloftenbethebestyoucando.”Paraphrase:Yourmostreasonableguesswilloftenbetheutmostyoucando.Paragraph7marketingplan:aplanaboutcommercialselling;planasregardsconditionsoropportunitiesforbuyingandsellingaproductvisualdisplay:adevicewhichdisplaysdataonascreenconventionaloutlets:traditionalshopswhichsellgoodsmadebyaparticularcompanyoutletn.awayout(forwater,steam,etc.);meansofreleasing(energy,strongfeelings,etc.);[commerce]shop,etc.thatsellsgoodsmadebyaparticularcompanye.g. Thiscreekistheoutletofthelake.Childrenneedanoutletfortheirenergy.Thiscosmeticsfirmhas34outletsinBritain.massmerchandisers:largenumbersofshopsorstoresthatbuyandsellgoodsParagraph8guesstimaten.anapproximatecalculationofthesizeoramountofsth.whenyoudonotknowallthefactse.g. IcouldmakeonlyaguesstimateoftheexpenditureifwewouldspendoneweekinRome.Currentguesstimatesarethattheoilpricewillincreaseby10%nextweek.marketingconsultant:anexpertwhogivesadviceonmarketing consultantn.apersonwhogivesexpertadvice(inbusiness,law,etc.)e.g. Itisafirmofmanagementconsultants.Heisthepresident'sconsultantoneconomicaffairs.telecommunicationsn.communicationsbycable,radio,satellite,telegraph,telephone,orTVe.g. Telecommunicationsareveryconvenientinmoderntimes,whichmakestheearthaglobalvillage.Telecommunicationsacrosstheworldrenderourliferichandcolorful.Paragraph10pianotuners鋼琴調(diào)音師:personswhoadjustpianostothecorrectpitch“Toanswerthequestion,herecommendedbreakingitdownintosmaller,moremanageablequestions,andthenhavingthecouragetomakesomeguessesandassumptions.”Paraphrase:Toanswerthequestion,hesuggestedthathisstudentsrenderitintosmallerquestionsthatareeasiertodealwith,andthentheyshouldbeboldenoughtoestimateandassumeapproximateanswers.assumptionn.sth.acceptedastrueorassuretohappen,butnotprovede.g. Thetheoryisbasedonaseriesofwrongassumptions.Weareworkingontheassumptionthattherateofinflationwillnotincreasenextyear.averagen.theusualamount,extentorrate;theordinarystandard;anamountobtainedbydividingthetotalofgivenamountsbythenumberofamountsinthesete.g. Thenewspaperreceivedanaverageof100articlesadaylastyear.Thelawofaveragesworksuniversally.Theboy'sworkatschoolisaboveaverage.“Thatmakes50,000tuningsayear.”Paraphrase:Therefore,50,000pianosaretobetunedeachyear.tunevt.toputamusicalinstrumentintune;adjustaradioreceivertotheparticularfrequencyoftherequiredsignalse.g. HetunedhisinstrumentShetunedintotheVoiceofAmerica.Paragraph12“Atanypoint,yourassumptionsmaybetoohighortoolow.Butbecauseofthelawofaverages,yourmistakeswillfrequentlybalanceout.”Paraphrase:Atanypoint,whatyouhaveacceptedastrueorassumedtoberightmayactuallynotbeso.Butbecauseoftheapplicationofthelawofaverages,theeffectofyourmistakeswillfrequentlybeminimized.balanceout:tooffset;keeporputinastateofbalancee.g. Thisyear'sprofitswillbalanceoutourpreviouslosses.Hislackofexperiencewasbalanced(out)byhiswillingnesstolearn.Myaccountsbalanceoutforthefirsttimethisyear.Summary+Homework(5mins)Theseconddivision,whichincludesparagraphs6-18,isthemainpartoftheessay.Inthispart,thewriterfirstreferstotheuniversalsignificanceofsmartguessing,.Next,hegivesanexampleofwhatscientistscallaFermiproblem.Then,hedefines,explainsandillustratesitwithactualtypicalexamples.Thelastexmpleisparticularlyworthourattention,foritshowshowscientificexperimentation,carefulobservationandsmartapproximationcontributetoscientificdiscoveriesorinventions.Homework:previewthetextfromparagraph15-20.Previewwritingstrategiesonpage151復(fù)習(xí)思考題What’stheuniver