Unit13Integrating高一英语课件
日期：2010-02-24 02:50
thuscleaningourwaterQ4:Sinceestuariesactasfilters，IntegratingSkillsoNature’sNursery:EstuariesFindthedefinitionofanestuaryAnestuaryisthebodyofwaterwherearivermeetstheoceanSaltwaterfromtheoceanandfreshwaterfromtherivermixtogetherinanestuaryThismixingoffreshandsaltwatercreatesauniqueenvironmentfilledwithlifeofallkinds－azonebetweenthelandandseaStructureofthepassage124312431234√Mainideaofthepassage:EstuariesarethenurseryforlifeintheoceansandriversQuestions:1)Whyareestuariessuchgoodplacesfornature’syoungone?2)Whatdoesdensitymeaninthispassage?3)Howdoestuariesaffectthewaterthatpassesthroughthem?4)Whyareestuariesmoresensitivetopollutionthanotherareas?5)Whyareestuariesimportanttohumanbeings?Q1:Becausethehabitatprovidesallthebenefitsoftheocean(energyandnutrients)withoutthedangers(wavesandstorms)Q2:“Density“meansthenumberofspeciesperareainthispassageQ3:Estuariesabsorbnutrientsandpollutantsfromwatercomingfrominlandsources，manypollutantsendup，
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