下学期unit13Ｄ高二英语课件
日期：2010-02-19 02:21
Unit13IntegratingSkillsoReadingonP22AnestuaryisthebodyofwaterwherearivermeetstheoceanSaltwaterfromtheoceanandfreshwaterfromtherivermixtogetherinanestuaryHowfreshwaterandsaltwatermixwitheachotherinanestuary?Scanning1Whyareestuariessuchgoodplacesfornature’syoungone?Becausethehabitatprovidesallthebenefitsoftheocean(energyandnutrients)withoutthedangers(wavesandstorms)2Whatdoesdensitymeaninthispassage?“Density”meansthenumberofspeciesperareainthispassage3Howdoestuariesaffectthewaterthatpassesthroughthem?Estuariesabsorbnutrientsandpollutantsfromwatercomingfrominlandsources，thuscleaningourwater4Whyareestuariesmoresensitivetopollutionthanotherareas?Sinceestuariesactasfilters，manypollutantsendupintheestuaries5Whyareestuariesimportanttohumanbeings?EstuariesareimportanttohumanbeingsbecauseweliketostudyandrelaxinthemandbecausetheycontributetotheeconomythroughtourismandfishingFillinEstuariesarebodiesofwateralongcoaststhatare________(形成)，
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