高中英语 Unit4《Exploring plants》Listening课件（1） 新人教版选修9.ppt

listening 1 howwouldyoudescribeeachplant whatdoyouthinkisunusualabouteachplant 2 oneofthepicturesshowspitcherplantsandanothershows livingstones whichpictureshowswhichplant thenameoftheplantintheotherpictureisrafflesia listeningonp36 lookcarefullyatthephotosoftheplantsandanswerthequestions livingstone rafflesia pitcherplants pitcherplant nowlistentomark gordonandandreatellingtheirclassabouttheseplants whichstudenttalksaboutwhichplant mark pitcherplant livingstonesorlithops gordon rafflesiaarnoldii andrea listentotheotherstudents reactionstomark gordonandandrea sdescriptionsoftheplants writedowntheexpressionstheyuse expressionsofwonder that samazing whatfantasticplants wow howinteresting ithinkit sfantastic expressionsofdisgust oh yuck that sdisgusting unusualplant th todaymark gordonandandreaaregoingtotellusaboutsomeunusualplants mark doyouwanttogofirst m sure today iwanttotalkaboutaninsect eatingplantcalledapitcherplant listeningtext here saphotoofit lookatthisparthere it sshapedlikeapitcher it sactuallyaleafeventhoughitlookslikeaflower it sreallyclever theinsectsareattractedbythesweetsmellcomingfromwhattheythinkisaflower butit satrap onceaninsectgoesdownintothepitcher itcan tgetoutastherearesmallhardhairspointingdownwardsthatpreventitfromescaping intheend theinsectfallsdownintoapoolofliquidatthebottomofthepitcherandgetsdigestedbytheplant s1 that samazing s2 whatfantasticplants th gordon g thesearetheplantsi mgoingtotalkabout they reoftencalled livingstones buteventhoughtheydolookabitlikestones theyareinfactplants s3 wow s4 howinteresting g theirscientificnameislithopsandtheycomefromsouthafricaandnambia thebodyofalithopsisactuallyapairofleavesthathavebecomeroundedlikeastone thisisbecausethisplantlivesinvery hotanddryplaces whentheleavesareshapedlikethis notmuchwaterislostfromtheplant anotherinterestingthingaboutthesestrangeplantsisthatthey rethesamecolourandappearanceofthesoilandstonesaroundit thismakesthemlessobvioustoanimallookingforfood th thanks gordon andrea a i mgoingtotellyouaboutrafflesiaarnoldii aplantthathasafloweraboutonemetrewide infact it sthelargestflowerintheworld rafflesiaarnoldiidoesn thaveanyleaves stemsorroots itdoesn tneedthemasit saparasite itgetsthisfoodby livingonanotherplant youmightthinkthatthisflowershouldsmellwonderfulbutitactuallylooksandsmellslikerottingmeat s2 oh yuck s1 that sdisgusting s3 ithinkit sfantastic a metoo anyway itattractsinsectsthateatdeadanimalsbutinsteadofgettingafeed theinsectspickupitspollenandspreadittootherrafflesias rafflesiaarnoldiigrowsinthejunglesinindonesiabutastheforestsarebeingcutdown it sbecomingveryrare th thanksandreaandthankseveryone thoseplantsarecertainlyfascinating listeningonp75 pre listening 1 inwhichpartsofthewordwouldyoufindtropicalrainforests tropicalrainforestsoccurinthreemajorregions asia africaandcentralandsouthamerica 2 whydoyouthinkrainforestsarebeingcutdown aspopulationsincrease peopleneedmorelandtoliveon therearealsominingcompanieswhichdestroyforestsintheirsearchforminerals 3 whydoyouthinktropicalrainforestsareimportanttotheworld becausethereareabout10millionspeciesofplantandanimalintheworld morethanhalfoftheseliveinthetropicalrainforests therainforestcouldprovideuswithcuresfordiseases also rainforestsabsorbalotofrainsothatthere saconstantsupplyofcleanwaterrunningintoriversandlakes numberthetopicsbelowintheorderinwhichyouhearaboutthem theareaoftheearth slandcoveredbytropicalrainforest reasonswhyrainforestsarebeingdestroyed therateofrainforestdestruction someconsequencesofrainforestsbeingdestroyed thebestwaytomakemoneyfromrainforests 1 3 2 5 4 arethesestatementstrueorfalse correctthefalsestatements 1 rainforestscover14 oftheearth slandsurface 2 morethanhalfoftherainforestshavedisappeared f 6 t 3 150acresofrainforestaredestroyedeveryday 4 in40years timewemightnothaveanyrainforestsleftonearth 5 peoplecanmakemoremoneyfromharvestingrainforestplantsthanfromcuttingdowntherainforests f over150acresofrainforestaredestroyedeveryminute t t thedestructionoftropicalrainforestsedwalker e isinterviewingdrannebutler a aboutthedestructionoftropicalrainforests listeningtext e anne wehearalotthesedaysabouthowquicklytropicalrainforestsaredisappearing a yes that sright rainforestsnowcoveronly6 oftheearth slandsurface theyusedtocoverabout14 somorethanhalfoftheworld stropicalrainforestshave beendestroyed andthat sinlessthan50years over150acresofrainforestislosteveryminuteinasia africa centralandsouthamerican e that sunbelievable a yes it sfrightening thelastremainingrainforestscouldbegoneinlessthan40years e butwhyisthishappening a well thereareanumberofreasons aspopulationsincrease peopleneedmorelandtoliveon forestsarecutdowntoplantcropsortostartfarms thewoodissoldforfirewoodorbuildingmaterials furnitureandpaper forexample andtherearealsominingcompanieswhichdestroytheforestsintheirsearchforminerals e isupposepeoplehavetomakealiving a yes butyouknow peoplecanmakemoremoneybyharvestingthingslikefruits nutsandoils aswellasplantsthatcanbeusedinmedicinethanbycuttingdowntheforests e ohreally ididn tknowthat now couldyououtlinesomeofthereasonswhyit snotagoodideatodestroyrainforests a sure youmusthaveheardabouttherichanimalandplantlifeintropicalrainforests well thereareabout10millionspeciesofplantsandanimalsintheworld morethanhalfoftheseliveinthetropicalrainforests so destroyingrainforestsmeansthatthousandsofthesespeciesaredyingoutbeforewe veevenrealizedit e i veheardtoothattherainforestcouldprovideuswithcuresfordiseases a yes therearecertainlymanynewdrugswaitingtobediscovered anotherproblemisthat