PAGEPAGE4第頁章序名稱Book5Unit7周次第12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(diǎn)1.theusingofthenewwordsandexpressions2.thecomprehensionofthetextandthestructuralanalysisofthetext教學(xué)難點(diǎn)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(15mins)Whatdoyoulearnfromthispassage?Cananyonesummarizeit?Thisexpositoryessaydiscussesassignificanttopic:howtohazardagusstimatesoastosolveaFermiproblem.Thetext,whichcomprises20paragraphs,maybedividedintothreeparts.Thefirstdivisionprovidesthebackgroundoftheessay.Inthispartthewriterdescribestheone-questionquizthathehasdesigned,pointsoutthreedifferentapproachestothesolutionwiththethirdoneleadingtothecorrectanswer,andmentionstheresultofthequiz.Theseconddivision,whichincludesparagraphs6-18,isthemainpartoftheessay.Inthispart,thewriterfirstreferstotheuniversalsignificanceofsmartguessing,.Next,hegivesanexampleofwhatscientistscallaFermiproblem.Then,hedefines,explainsandillustratesitwithactualtypicalexamples.Thelastexmpleisparticularlyworthourattention,foritshowshowscientificexperimentation,carefulobservationandsmartapproximationcontributetoscientificdiscoveriesorinventions.Thelastdivision,whichcoversthelasttwoparagraphs,istheconclusionoftheessay,.Inthisconcludingpart,thewriteranswersthequestionputforwardinthebeginningandtellsushowguessworkhelpsusarriveatanapproximatelycorrectanswer.HowcanyousolveFermiproblemssuccessfully?First,wemustpossessextensiveknowledgeofvarioussubjects.Secondly,wemustbeimaginative,ingenious,resourcefulandabletothinkcreatively.Thirdly,wemustmakegooduseofourreasoningpowerandgeneralknowledgetohazardaguesstimateorriskanapproximation.Fourthly,wearesupposedtobegoodatcalculationsorinmathematics.Detailedstudyofwritingstrategies(25mins)exposition:記錄性的,實驗報告,菜譜書,

argumentation:辯論,中間有觀點(diǎn)

description:描述,像詩,散文

narration:講故事,里面會說出道理Whatisexposition?ExpositionisexplanationToexplaintheobjectivecharacterandnatureofthings.（解釋事物客觀特征和本質(zhì)）Toclarifytheoccurrenceanddevelopmentofthings.（闡明事情發(fā)生和發(fā)展）ItanswersthequestionsWhat,How,andWhy.（它回答是什么,怎么,并且為什么的問題）purposeofExpositionThepurposeofexpositionistopresent,completelyandfairlyotherpeople’sviewsortoreportaboutaneventorasituation說明文的目的：表達(dá)一個完整、清晰、客觀、準(zhǔn)確的意見或報告對一個事件或情況DifferencefromothertypesofwritingDescription:appearance&feelingNarration:events&experienceExposition:Processes&relationshipsprinciplesofExposition1.Makesureyouhaveunderstoodexactlywhatthequestionisaskingyouandwhatthemarkingguidelinesmean2.Simplicity:wordsandsentencesoftheexpositionshouldbesimple,plain,andeasytounderstand.

3.Accuracy:theaccuracyofthelanguageistheprerequisiteoftheexposition.4.Scientific:

expositiontoexplainscientificknowledge,shouldemphasisonthepreciseuseofscientificterms.5.Interesting:thetextshouldbeappropriateuseofvividdescription.

6.Straight:structuralorderliness7.logicconventionsofExpository1.Formaltone:avoidslangandcolloquialismsanduseformallanguagewhereverpossible2.Thirdperson:avoidI3.Strictstructure4.Avoidapproximationssuchas“probably”“perhaps””maybe”.beassertiveanduse“is”MethodsofexpositionIllustrationComparisonandContrastCauseandEffectClassificationandDivisionIllustrationWhen:Specific;Concrete;Vivid;Understandable;……StructureofExpositionConclusion

Answerthequestionaccordingtoyourthesis,bringtogetherallyourinformationinamoregeneralwayintheintroduction.Theanswerstothequestions:Inthebeginningaone-questionquizisdescribed,inwhichaninterestingquestionisasked,andintheconclusionitsanswerisoffered,withthesmartguessingprocesspresented.Thus,thebeginningandtheconclusionarenaturallyconnectedwitheachother.Altogether,fourexamplesareprovidedtoexplainaFermiproblem.TheyareverytypicalexamplesthatbestillustratewhataFermiproblemis.3.Dothelanguageworkexercises(50)Explainedtheitalicizedpartineachsentenceinyourownwords.（justtochecktheanswers）Fillineachblankwithoneofthetwowordsfromeachpairintheirappropriateformsandnotethedifferenceofmeaningbetweenthem.(Explainthedifferenceofeachpairwithexamples.Havethemreadthesentencewiththeiranswers.Correcttheiranswers.)Fillintheblankineachsentencewithawordorphrasetakenfromthebox,usingitsappropriateform.Putawordineachblankthatisappropriateforthecontext.(Checktheiranswerstogether,payingattentiontocorrecttheirwayindoingthiskindofexerciseandmakingthemgetintothehabitofanalyzingthepassagefromthecontext,grammar.Trytomakethembesensitivetotheclueswhichhintinthecontext)Summary+Homework(5mins)Summary:Thelastdivision,whichcoversthelasttwoparagraphs,istheconclusi