高中英语 414(Unit 4 Reading)课件 新人教版必修3 课件VIP免费

新课标人教版课件系列《高中英语》必修3-4.14Whatwasthereontheearthbeforelifebegan?Whydoesscientistthinktherehasneverbeenlifeonthemoon?Whydoanimalsfirstappearinthesea?Whydogreenplantshelplifetodevelop?Whyweremammalsdifferentfromotheranimals?Wearegoingtolearnapassageabouthowlifebeganontheearth.Nowreadthetextquicklywiththefollowingquestions.Nowpleaselistentotherecordingofthetext.Payattentiontothepronunciationofeachwordandthepauseswithineachsentenceandtrytofindoutthecharacteristicsofthewholepassage.Nextyouaretoreadandunderlinealltheusefulexpressionsorcollocationsinthepassage.Copythemtoyournotebookafterclassashomework.Getthemainideaofeachparagraph.Readthepassagequicklyandfindouttheanswerstothequestionsbelow.•1.What’sthemainideaofthetext?•2.Thetopicsentenceofeachparagraph?•3.Howmanypartscanthetextbedividedinto?•4.What’sthemainideaforeachpart?ScanningScanning1.What’sthemainideaofthetext?Howlifebeganontheearth.Thedevelopmentoflivingthings.2.Topicsentences:①Afterthe“BigBang”,theearthwasjustacloudofenergeticdust.②Whatscientiststhinkthatthedifferentbecauseofthearrivalofsmallplantsgrowinginthewateronitssurface.③Manymillionsofyearslaterthefirstgreenplantsbegantoappearonland④Smallcleveranimals,nowwithhandsandfeet,appearedandspreadallovertheearth.Howmanypartscanthetextbedividedinto?Threeparts:Part1(para1)Part2(para2.3.)Part3(para4)Watermadeitpossibleforlifebegintodevelop.Thedevelopmentoflife.Thedevelopmentofpeople.Energeticdustaballslowlycombinetheearthcooleddownitexplodedandproducedkindsofgaseswatertheearth’satmosphereBigBangReadPara1.andfindouthowtheearthcameoutFillintheblankswiththeproperwords:Afterthe________,theearthwasacloudof___________.Laterthedustbeganto_______Into_____.Andthenit________loudlywithfireandrock,whichwereintimeto__________thewatervapour,carbondioxide,…whichweretomaketheearth’s____________.Astheearth_______down,_____beganto________onitssurface.Waterhad_________fromplanetsorsatellites,butit_______ontheearth.Thatmadeitpossibleforlifetobeginto________.energeticdustcombineexplodedproducecooledappeardisappearedstayeddevelop“BigBang”aballatmospherewaterReadpart2verycarefully,andfilloutthechart:Howlifebeganonearthwater1.2.3.4.insects(onland)5.6.7.8.dinosaurs(onland)9..smallplantsinwatershellfishandallsortsoffishgreenplantsonlandamphibians(onlandandinwater)forestsreptiles(onland)mammals(onland)Fillintheblankswiththeproperverbs:Thearrivalof_________encouragedthe_________ofearly_____________________.Manymillionsofyearslater______________begantoappear_________.Later__________appeared.Somewere________.Otherscalled__________,wereabletoliveonlandswellas_________.Whentheplantsgrewintoforests,________appearedforthefirsttime.Aftertheydisappeared,________becamemoreimportant.Theywerethelastgroupofanimalsdifferentfrombecausethey_________fromwithintheirbodies.developmentshellfishandallsortsoffishonlandlandanimalsamphibiansdinosaursmammalsproducedsmallplantsthefistgreenplantsinsectsintheseaIntensivereading1.Whywastheearthdifferentfromotherplanets?A.Itproducedalotofheat.B.Thewaterremained.C.Waterdisappeared.D.Itwastheoldestplanet.√2.Whywaslifeabletodevelopontheearthbutnotonotherplanets?A.Theearthhadasolidshape.B.Theearthwasnottoohotandnottoocold.C.Theearthdidn’thaveharmfulgasesinitsatmosphere.D.Thewaterstayedontheearthbutnotonotherplanets.√3.Whywasitnecessar...