最新人教版高中英语必修三第四单元课件PPT教学讲义ppt课件.ppt 35页

'进入夏天，少不了一个热字当头，电扇空调陆续登场，每逢此时，总会想起那一把蒲扇。蒲扇，是记忆中的农村，夏季经常用的一件物品。　　记忆中的故乡，每逢进入夏天，集市上最常见的便是蒲扇、凉席，不论男女老少，个个手持一把，忽闪忽闪个不停，嘴里叨叨着“怎么这么热”，于是三五成群，聚在大树下，或站着，或随即坐在石头上，手持那把扇子，边唠嗑边乘凉。孩子们却在周围跑跑跳跳，热得满头大汗，不时听到“强子，别跑了，快来我给你扇扇”。孩子们才不听这一套，跑个没完，直到累气喘吁吁，这才一跑一踮地围过了，这时母亲总是，好似生气的样子，边扇边训，“你看热的，跑什么？”此时这把蒲扇，是那么凉快，那么的温馨幸福，有母亲的味道！　　蒲扇是中国传统工艺品，在我国已有三千年多年的历史。取材于棕榈树，制作简单，方便携带，且蒲扇的表面光滑，因而，古人常会在上面作画。古有棕扇、葵扇、蒲扇、蕉扇诸名，实即今日的蒲扇，江浙称之为芭蕉扇。六七十年代，人们最常用的就是这种，似圆非圆，轻巧又便宜的蒲扇。　　蒲扇流传至今，我的记忆中，它跨越了半个世纪，也走过了我们的半个人生的轨迹，携带着特有的念想，一年年，一天天，流向长长的时间隧道，袅人教版高中英语必修三第四单元课件PPT I.WarmingupWhat"sthemeaningoftheword“Astronomy”?2.Doyouknowthefollowingterms?star（）planet（）thesun/moon/earth（）solarsystem（）3.Howmanyplanetsareinthesolarsystem? I.WarmingupWhat"sthemeaningoftheword“Astronomy”?thescienceofstars;2.Doyouknowthefollowingterms?star（恒星）planet（行星）thesun/moon/earth（太阳、月亮、地球）solarsystem（太阳系）3.Howmanyplanetsarethereinthesolarsystem?8 Inthisunit,we’lllearnsomethingmorescientific1.What’sthetitleofthetext?howlifebeganontheearth2.Fromthetitle,wecanpredictthatthetextmaytellustheoriginoflifeontheearth.Doyouknowsomestoriesaboutit? Panguseparatestheskyfromtheearth Nvwamadehumans Readthepassagequicklyandanswerthequestions1.Whendidthe“BigBang”happen?2.Whatformwastheearthafterthe“BigBang”?3.Whatmadeuptheearth’satmosphere？4.Howdidwatercomeintobeingontheearth?5.What’sthesignificanceofthepresenceofwaterontheearth?6.Whatwasimportanttothedevelopmentoffish?7.Whatmadepossibletheriseofmammalsontheearth?8.Whyaremammalsdifferentfromalllifeformsinthepast? PhrasesandUsefulExpressionscirclearound绕…转accordingto…根据awidelyacceptedtheory熟知的理论inalldirections向着四面八方intime及时；终于cooldown冷却befundamentalto…对…关键achainaction连锁反应…makeitpossiblefor…todo…使…可能givebirthto…生育11.prevent…from阻止…做…12.millionsofyearstocome未来的几百万年 1.Whendidthe“BigBang”happen?Ithappenedseveralbillionyearsago.ScanningReadthepassagequicklyandanswerthequestions 2.Whatformwastheearthafterthe“BigBang”?Theearthwasstilljustacloudofdust.3.Whatmadeuptheearth’satmosphereaftertheearthexploded?Carbon,nitrogen,watervapourandothergases. 4.Howdidwatercomeintobeingontheearth?Astheearthcooleddownafteritexploded,watercameintobeing. 5.What’sthesignificanceofthepresenceofwaterontheearth?Itallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas. 6.Whatwasimportanttothedevelopmentoffish?oxygen.7.Whatmadepossibletheriseofmammalsontheearth?Thedisappearanceofdinosaursmadethepossibletheriseofmammalsontheearth. 8.Whyaremammalsdifferentfromalllifeformsinthepast?Theygavebirthtoyoungbabyanimalsandproducedmilktofeedthem. ClosereadingI.Readthepassagecarefullyandmatchthemainideawitheachparagraph. Para.1A.Theformation(形成)oftheearth.Para.2B.Theimportanceofwaterforlife.Para.3C.Awidelyacceptedtheoryabouttheformationoftheuniverse.Para.4D.Thearrivalofhumansandtheirimpactontheearth.Para.5E.Thedevelopmentofplantsandanimalsontheearth. True(T)orFalse(F).1.TheearthappearedbeforetheBigBanghappened.2.Theoriginalatmosphereconsistedofnitrogenandoxygen.3.Themaindifferencebetweentheearthandotherplanetsisthatthereiswaterontheearth.4.Lifebeganinwaterandthenonland.FFTT SummaryWhatdowelearntoday? SummaryHowlifebeganontheearth. Puttheorderofdevelopmentoflifeintoatimeline.Usethereadingpassagetohelpyou.1.Insectsandamphibiansappeared.(10)2.Dinosaursappeared.()3.Theearthbecameasolidball.()4.Smallplantsgrewonthewater.(8)5.Reptilesappeared.()6.Plantsbegantogrowondryland.() 7.Theearthwasacloudofdust.()8.Waterappearedontheearth.(1)9.Shellfishandotherfishappeared.()10.Theuniversebeganwitha"BigBang".()11.Cleveranimalswithhandsandfeetappeared.(12)12.Mammalsappeared.() discussingWhatshouldwedoforourearth? Youcanusethefollowingwordsorphrasestohelpyou:prevent…from…/harmfulglobalwarming/carbondioxide/dependonasaresult/inturn…… Homework1.Findthedifficultiesinthepassage.2.Finish"LearningaboutLanguage"partonPage28. EndThankyou In1863thefirstundergroundpassengerrailwayintheworldopenedinLondon.Itranforjustundersevenkilometersandallowedpeopletoavoidterrible61__________(crowd)ontheroadsaboveastheytravelledtoand62_________work.Ittookthreeyearstocompleteandwasbuiltusinganinterestingmethod.crowdsfrom Thisincludeddigginguptheroad,63___________(lay)thetrackandthenbuildingastrongroofover64________top.Whenallthosehadbeendone,theroadsurfacewasreplaced.Steamengines65___________(use)topullthecarriagesanditmusthavebeen66___________(fair)unpleasantlayingthewereusedfairly forthepasssengers,withallthesmokeandnoise.However,therailwayquicklyprovedtobeagreatsuccessandwithinsixmonths,morethan25,000peoplewereusing67_______everyday.Later,engineers68_______________(manage)toconstructrailwaysinasystemofdeeptunnels(隧道）,itmanaged whichbecameknowntothetube.Thisdevelopmentwasonlypossiblewiththe69______________(introduce)ofelectric-poweredenginesandlifts.ThecentralLondonRailwaywasoneofthemost70____________(success)ofthesenewlines,andwasopenedin1900.Ithadwhite-paintedtunnelsandbrightredcarriages,introductionsuccessful andprovedextremelypopularwiththepublic. '