八年级英语下册 Chapter 2 Pollution Fighters课件 上海牛津版.ppt

《八年级英语下册 Chapter 2 Pollution Fighters课件 上海牛津版.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、ChapterTwoPollutionFightersLookandThinkWhatgoodaretrees?Wegetshadefromtrees.Weget__________fromtrees.bettercitiesWeget_____________fromtrees.woodenhousesWeget__________fromtrees.furnitureWeget_____fromtrees.paperWeget_______fromtrees.pencilsWeget_____fromtrees.coke

2、Weget__________fromtrees.coffeebeansWeget______fromtrees.fruitsWhatdoyouknowabout…?Howlongdotheylive?Matchtheitemsontheleftwiththeaverageagesontheright.amicei70yearsbtreesii150yearsctortoisesiii40yearsdwhalesiv4000yearsepeoplev3yearsWhatdoesthewordmean?11.supposea.

3、knowb.thinkitistruec.ask3.releasea.bringinb.takeawayc.letout5.communicatingwitha.attackingb.sendingmessage/signalstoc.joining2.purenotmixedwithotherthingsnotcomfortable4.runningtravelingworkingplaying6.hardlyanyquitealotalmostnonealargenumber1.sipa.madebynature,not

4、byman2.natureb.unpleasant3.oxygenc.drinkinsmallamounts4.hectaresd.alife-givinggasfoundinair5.warne.somethingproducedbychemistry6.achemicalf.areasof10000squaremeters7.nastyg.gaythatsomethingbadordangerousormayhappensDoyouknowthemeaning?FindthefactsTrees:1.livemuchlo

5、ngerthanpeople;2.producerubber,wood,paper,nuts,beansandfruit;3.takeoxygenfromtheair;4.heattheair;5.arelikeairconditioners;6.cannotprotectthemselvesagainstinsects;7.cansharefoodandwaterwithoneanother;8.areindanger,mainlyfrominsects;TTTTFFFFreleasecoolcanpeople/human

6、sAnswerthequestions1.Wegetsomeusefulthingsfromtrees,don’twe?Yes.Twoexamplesarewoodandrubber.2.Isittruethattreesdotwomainthingstotheair?Yes.Theycoolitandcleanit.3.I’veheardthatonetreehasthepowerof15airconditioners.Isthatright?No.Onetreeshasthepoweroffiveaircondition

7、ers.4.Scientistsknowalotabouttrees,don’tthey?No.theyareonlynowbeginningtounderstandthem.5.Cantreesreallycommunicatewithoneanother?Yes.Forexample,ifinsectsattackatree,itcanwarmitsneighbors.6.Andcantheyreallyprotectthemselvesfrominsects?Yes.Theycanproduceachemicaltha

8、tmakestheirleavestastenasty.Answerthequestions7.Cantreeshelponeanother?Yes.Forexample.Theycanjointheirrootstogetherunder-groundandpassfoodandwate