人教版高一英语m4unit2课件 (1)

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1、Listening高一必修4Unit2ListeningListeningonPage15Whatisthemaintopicoftheconversation?Thepossiblebadeffectsofchemicalfertilizersonthefruitandvegetablesthatweeattoday.PaulthinksthatCarrieisnottellinghimthetruth.Usingchemicalfertilizersalwaysmakesvegetablesemptyinside.Today’sfruitis

2、notashealthyforpeopleasfruitfiftyyearsago.Eatingmorevegetablesmightnotalwaysbegoodforus.Alloftoday’svegetableslookhealthybutinfactarenot.ListeningTFTFTListeningonPage48Whatmaketheworld'sdesertsgrow?Doyourememberthepoem?天苍苍，野茫茫，风吹草低见牛羊。Canweseethisbeautifulsceneagain?Listening

3、Listentothetapeandtickwhatyouhear.Heatandlittlerain.Turningforestsintofarmland.Overusingfieldstofeedfarmanimals.Usingnewscientificfarmingmethods.Wastingwaterinfarmsandathome.Farmingtoomuchonpoorland.Listentothetapeagainandchoosethebestanswertoeachquestion.WhywasNorthAfricaimp

4、ortantinthefirstcenturyBC?A.RomesentalotofcornandwheattoNorthAfrica.B.LandinNorthAfricawasusedtoproducethebreadthatfedallofRome.C.ThedesertinNorthAfricawasfamousinRome.2.Howdoesfarmlandturnintodesert?Windblowsawaydrysoilandthenthelandbecomessandy.Hotweathermakesthelandbecomes

5、andy.C.Toomanyplantscanmakefarmlandbecomedesert.3.HowarenewfarmingmethodshelpingtostopthedesertinXinjiang?A.Themethodsletthefarmersuseleswater.B.Themethodsletfarmersgrowthesameamountofcropsinlessland.C.Themethodsdonotusefertilizers.