Nature in the balance 课件教学讲解

Unit1Natureinthebalance【版本：译林册别：必修三】Welcometotheunit—Reading目录页contentsPre-readingⅠPost-readingⅣFastreadingⅡIntensivereadingⅢⅠPre-readingPre-reading上文两句出自德国哲学家、革命导师弗里德里希·恩格斯的《劳动在从猿到人转变过程中的作用》一文，意在说明人类与自然界要和谐共处。Letusnot,however,flatterourselvesovermuchonaccountofourhumanvictoriesovernature.Foreachsuchvictorynaturetakesitsrevengeonus.

但是我们不要过分陶醉于我们人类对自然界的胜利。对于每一次这样的胜利,自然界都对我们进行报复。

Song1:HealtheWorld(byMichaelJackson)

Pre-reading:Welcometotheunit(P1)

Song2:Theearthisouronlyhome.(fromP1)

Questions:①Whatisthemessageofthetwosongs?②Whatcanyoudotohelpprotecttheenvironment?ListentothesongsPre-reading:ImportantphrasesinWelcomethehumanrace_________doharm(to)___________cutdown_____________soundthealarm_____________bethankfulfor

sth____________findthesolution(tosth)_________对…有害人类砍伐，砍倒发出警报对…感激；为…庆幸找到解决…的方法ⅡFastreadingTheworldweliveinisfullofnaturalwonders.TodaywecometoknowtheAmazonrainforest,whichishometoawiderangeofwildlife.Fastreading:P2-3WhenitcomestotheAmazonrainforest,whereisit?whatplantsoranimalsdoyouknowabout?doyouknowthegreatfirein2019there?Freetalk

TheWorldWildlifeFoundation(WWF)

says

theworld'slargestrainforestcontainsmillionsofspeciesofplantsandanimals.Manyofthemarestillunknown.Amongthebestknownanimalsarejaguars,eagles,pinkriverdolphins,parrots,largesnakesandmanybutterflies.Morethan30millionpeople,including350indigenous

andethnicgroups,liveintheAmazonareaanddependontheforestsforfoodandshelter.What'sintheAmazon?Thefiresnotonlydestroypartsofthecarbon-absorbingforests,buttheyreleasemillionsofmetrictonsofcarbonintotheair.TheAmazonrainforestalsoisimportanttorainfallinthearea.Deforestationmakesrainslessfrequent,extendingthedryseason.If20to25percentoftheforestweredestroyed,thedryseasonwouldexpand.Thatwouldmeantheareawouldnolongerbearainforest,butatropicalsavannah,oranareawithgrasslandsandfewtrees.Unfortunately,wearealreadyseeingsignsoftheAmazonturningintoasavannah.Whatdothefiresmeantotheworld'sclimate?ThecurrentfiresintheAmazonarenotwildfires.Theyaremostlysetillegallybypeoplewhoareclearingtheforesttoraisecattleandcrops.Peopleclearthelandbycuttingdownthetreesduringtherainyseason,lettingthetreesdryoutandburningthemduringthedryseason.Fullyclearingthethickforestforagriculturalusecantakeseveralyearsofcuttingandburning.Whatiscausingthefires?Readthedocumentaryscriptandwritethemainideaofeachparagraph.Para.1:IntroductiontotheAmazonrainforestPara.2:BasicinformationabouttherainforestPara.3:_______________________________________Para.4:_______________________________________Para.5:_______________________________________FastreadingItsabundantplantspeciesAwiderangeofanimalspeciesandanunusualexample-jaguarAppealtopeopletopreservetherainforestIntensivereadingⅢ1.Howtounderstandthesentence“ahugeseaofgreenalivewiththesoundsofanimals”?aseaof:_________________________________alivewith:________________________________这是一片绿色的海洋，到处都可以听到动物发出的声音。Intensivereading:Readcarefullyandanswerquestions

Para1大量的，大片的充满，到处都是（活的或动的东西）2.WhatisthefunctionoftheAmazonrainforest?ItplaysasignificantroleinmaintainingthefinebalanceoftheEarth’secosystem.Intensivereading:Readcarefullyandanswerquestions

Para1Intensivereading:ecosystemplantsanimalswaterpeopleclimatesoilairAllthesefactorscontributetotherichestbiodiversity

ontheEarth.Intensivereading:Readcarefullyandanswerquestions

Para2-586million64004000130040020%17%Intensivereading:Readcarefullyandanswerquestions

Para2Basicinformationabouttherainforest_________:8countriesandoneoverseasregion_________:around6millionsquarekilometresofforest_________:about6,400kminlengthlengthsizelocationIntensivereading:Readcarefullyandanswerquestions

Para2location:TheAmazonrainforestcrossesintoeightcountries,includingBrazilandPeru,andoneoverseasregionofFrance,allontheSouthAmericancontinent.横越巴西(占森林60%面积)、哥伦比亚、秘鲁、委内瑞拉、厄瓜多尔、玻利维亚、圭亚那、苏里南、法国（法属圭亚那），占世界雨林面积的一半，全球森林面积的20%，是全球最大及物种最多的热带雨林。亚马孙雨林被人们称为“地球之肺”和“绿色心脏”。Intensivereading:Readcarefullyandanswerquestions

Para2size:Withanareaofaround6millionsquarekilometres,theAmazonrainforestismorethanhalfthesizeofChina.=Chinaismorethantwice__________________theAmazonrainforest.asbig/largeasIntensivereading:Readcarefullyandanswerquestions

Para2length:TheAmazonRiver,fromwhichtherainforestgetsitsname,iscloseto6,400kilometresinlength—roughy100kilometreslongerthantheYangtzeRiver.Onitsjourneyfromthemountainstotheocean,theriversupportsmanydifferentecosystems.Intensivereading:P5Intensivereading:Readcarefullyandanswerquestions

Para2TheygivetheAmazonrainforesttherichestb_______________ontheEarth:oneintenknowns____________intheworldcanbefoundhere.iodiversitypeciesThey:_______________________________________

_______________________________________

thespecificlocation,theimpressivesizeandlengthIntensivereading:Readcarefullyandanswerquestions

Para2Ofthe390,000plantsspeciesknowntous,morethan40,000canbefoundintheAmazon…Theforest’sdifferentlevelsofplantspeciessupportanu_________varietyofwildlife.nbelievableIntensivereading:Readcarefullyandanswerquestions

Para3Theforest’sdifferentlevelsofplantspeciesAtthebottom,________________________________________.Abovethat___________________________________________.Thenextlevel_________________________________________.Eachleveloftheforestformsitsownlittleworld,_______todifferentkindsoflivingthings.homeThenthereare______________________________,andfinally____________________________________________________.thereisasystemofrootsbeneaththegroundisthemassofleaflitteronthedarkforestfloorismadeupofshorterplantswithlargeleavesthetoweringancienthardwoodsthetopsofthetallesttreesmanymetresabovethegroundIntensivereading:Readcarefullyandanswerquestions

Para4Theforest’sdifferentspeciesofanimalsMorethan1,300speciesofb_____andover400speciesofm_______hideamongthejungle’splantlife.Theyformaperfect______________intheforest.irdsammalsfoodchainIntensivereading:Readcarefullyandanswerquestions

Para4Jaguarsfeedonatleast87species,including________.Thesefrogs,inturn,feedon_______whicheat_______and______.Whenajaguardies,atinyarmyofmicroorganismshelps__________itsbodyand________thenutrientstotheearth.

frogsinsectsleavesfruitbreak

downreturnIntensivereading:Readcarefullyandanswerquestions

Para4frogsinsectsleavesandfruitJaguars’deadbodiesJaguarstheforest’sfoodchainIntensivereading:Readcarefullyandanswerquestions

Para51.WhatmakestheAmazonrainforestanaturaltreasureaccordingtothescript?TheAmazonforestbreatheslifeintotheplanetbyfixingcarbonandproducingover20percentofalltheEarth’soxygen.Thus,itisknownasthe“lungsoftheplanet”.Moreover,theAmazonforestisatreasurehouseofspeciesthatcanbeusedforfoodormedicine.Intensivereading:Readcarefullyandanswerquestions

Para52.Theforest’scurrentdanger:Thereisonemajordangertothese____________plantsandanimals.Overthepast50years,about17%oftherainforesthasdisappeared________humanactivities,suchasa__________andcattlef________.irreplaceableduetogriculturearming3.Whatquestionareweleftwith?Canweaffordtodamagethe“lungsoftheplanet”?Intensivereading:Readcarefullyandanswerquestions

Para54.Inadditiontohuman’sactivities,whatotherfactorsmaycontributetothedisappearanceoftheforest?Theanswermaybehere:ThefollowingpassageisfromawebsiteabouttheAmazonrainforest.Pleasecompletethepassagewiththecorrectformsofthewordsandphrasesintheboxbelow.(P5)Post-readingⅣ1对…有害2砍伐树木3发出警报4找到某事的解决方法5因为(account)6自然奇迹7种类繁多的野生生物doharm/damagetosthcutdowntreessoundthealarmfindthesolutiontosthonaccountofnaturalwondersawiderangeofwildlifeImportantwords&phrases8充满，到处都是某物9在某事中起重要作用10保持生态系统完美平衡11…的面积12超过中国面积的一半13得名于…bealivewithsthplayasignificantroleinmaintainthefinebalanceoftheecosystemanareaof…morethanhalfthesizeofChinagetone’snamefrom…Importantwords&phrases14在长度上15地球上最丰富的多样性16躺在…上面17令人难以置信的野生生物多样性18在底部19在地下inlengththerichestbiodiversityontheEarthliedownonsthanunbelievablevarietyofwildlifeatthebottomImportantwords&phrasesbeneaththeground20由…组成21高耸的古老硬木22食物链上的一要素23以…为食24相应地，依次25一小群微生物bemadeupofthetoweringancienthardwoodsoneelementofthefoodchainfeedonsthinturnatinyarmyofmicro-organismsImportantwords&phrases26分解27给…带来起色，注入活力28固定；修理29而且；此外30不可替代的31继续做某事32濒临灭绝breakdownbreathelifeintosthfixmoreoverirreplaceablecontinuedoing/todosthindangerofextinctionImportantwords&phrases33给某人留一个问题34承担得起做某事35积累营养36因此37吸收;欺骗38被锁上，被关起来39以令人难以置信的速度增长/生长leavesbwithaquestioncanaffordtodosthbuildupnutrientsasaresulttakeinbelockedupImportantwords&phrasesgrowatanunbelievablespeed40documentaryscript41…的家园，…的栖息地42各种各样的43根据…判断（做状语的形式）44大片的、成片的

45由于纪录片脚本behometoawiderangeofjudgingfromaseaofImportantwords&phrasesdueto1.TheAmazonrainforestcrossesintoeightcountries,including

BrazilandPeru,andoneoverseasregionofFrance.

语法功能：__________________

此句可改为：TheAmazonrainforestcrossesintoeightcountries,BrazilandPeru,andoneoverseasregionofFrance__________(include).

非谓语动词做状语includedImportantsentences2.TheAmazonRiver,fromwhichtherainforestgetsitsname,iscloseto6,400kilometresinlength…语法功能：____________________________

定语从句Importantsentences3.Abovethatisthemassofleaflitteronthedarkforestfloor.

语法功能：_______________________________表示地点的介词短语位于句首用全部倒装

4.Whileasignificantnumberofjaguarssurvivehere,

theyareonlyoneelementofthisforest’sfoodchain.语法功能：_______________让步状语从句Importantsentences5.Overthepast50years,about17percentoftherainforesthasdisappearedduetohumanactivitiessuchasagricultureandcattlefarming.

语法功能：_______________现在完成时语法功能：_______________6.Withanareaofaround6millionsquarekilometres,the

AmazonrainforestismorethanhalfthesizeofChina.

TheAmazonRiver,….—roughly100kilometres

longerthantheYangtze倍数表达法A+be+倍数+thesize/height/weight/length/width/depthof+BA+be+倍数+比较级+thanBImportantsentencesA+be+倍数+as+形容词/副词+as倍数+what+主语+谓语

Theworldweliveinisfullofamazingw________.Amongthem,theAmazonrainforestisanaturaltreasure,Ahugeseaofgreen_____withthesoundsofanimals.Asthelargestrainforestintheworld,itplaysas_________roleinm_________thefinebalanceoftheEarth’se__________.FillintheblanksaccordingtothescriptondersaliveignificantaintainingycosystemTheAmazonrainforestc_____intoeightcountriesandoneo______region,allontheSouthAmericac________.Withan____ofaround6millionsquarekilometres,theAmazonrainforestismorethanhalfthe_____ofChina.TheAmazonRiver,______whichtherainforestgetsitsname,iscloseto6,400kilometresinl_______—r_______100kilometresl______thantheYangtzeRiver.____itsjourneyfromthemountainstotheocean,theriversupportsmanydifferente__________.Theygivethisareather______biodiversityontheEarth.rossesverseasontinentareasizeengthouglyongerOncosystemsichestfromFillintheblanksaccordingtothescriptMorethan40,000plants______canbefoundintheAmazon.Theforest’sdifferentlevelssupportanu_________varietyofwildlife.Attheb_____,thereisasystemofrootsb______theground.Abovethat___themassofleaflitteronthedarkfloor.Thenextlevelis___________shorterplantswithlargeleaves.Thentherearethet________ancienthardwoods,andfinallythetopsofthetallesttreesmanymetresabovetheground.Eachleveloftheforestformsitsownlittleworld,______todifferentkindsoflivingthings.peciesnbelievableottomeneathismadeupofoweringhomeFillintheblanksaccordingtothescriptMorethan1,300birdsandover400mammalsh____inthejungle.Thejaguarisoneexample.Whileasignificantnumberofjaguarss_____here,theyareonlyonee______oftheforest’sfood______.Theyf____onfrogs.Thesefrogs,in______,liveoninsectswhicheatleavesandfruit.Whenajaguardies,atinya____ofmicroorganismshelps___________itsbodyandreturnthen_______totheearth.ideurvivelementchaineedturnrmybreakdownutrientsFillintheblanksaccordingtothescriptTheAmazonrainforestb______lifeintotheplanetbyf____carbonandp________over20%ofalltheEarth’soxygen.Thus,itisk_____asthe“lungsoftheplanet”.M_______,theAmazonra