高级英语教案 4

PAGEPAGE4第页章序名称Book5Unit7周次第12周4授课时间年月日至年月日教学目的要求(1)Rhetoricalskill:featuresoftypicalexposition(2)Keylanguage&grammarpoints(3)Writingstrategies:exemplification(4)Theme:“quizandanswer”—tosolveaFermiproblem教学重点1.theusingofthenewwordsandexpressions2.thecomprehensionofthetextandthestructuralanalysisofthetext教学难点thewritingstrategiesofthetext教学场所环境classroom授课方式课堂讲授（√）；实验（）；实践（）；双语（√）课时分配2学时教学方法课堂讲授、小组讨论、问题法教学手段网络教学（）；多媒体（√）教学用具blackboard教学内容提要备注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:记录性的,实验报告,菜谱书,

argumentation:辩论,中间有观点

description:描述,像诗,散文

narration:讲故事,里面会说出道理Whatisexposition?ExpositionisexplanationToexplaintheobjectivecharacterandnatureofthings.（解释事物客观特征和本质）Toclarifytheoccurrenceanddevelopmentofthings.（阐明事情发生和发展）ItanswersthequestionsWhat,How,andWhy.（它回答是什么,怎么,并且为什么的问题）purposeofExpositionThepurposeofexpositionistopresent,completelyandfairlyotherpeople’sviewsortoreportaboutaneventorasituation说明文的目的：表达一个完整、清晰、客观、准确的意见或报告对一个事件或情况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