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1、Unit13 ScenicSpotsTheGrandCanyonItisAmerica’smostfamousscenicwonder.Itisahugegorge(峡谷)slowlycarvedaway(雕琢)fornearly6millionyearsbythewatersoftheColoradoRiver（科罗拉多河）.Thecanyonissodeepthatthereare4distinctivezonesofclimate（不同的气候带）fromtoptobottom.Locatedinnorth-westofArizona（亚利
2、桑那州<美国西南部的州>),itattractsover4millionvisitorseachyear.TheParkwasestablishedin1908byPresidentTheodoreRoosevelt.TheGrandCanyonAmerica’smostfamousscenicwonderLocation:CanyonoftheColoradoRiver(亚利桑那州科罗拉多河的大峡谷),120kilometersnorthofFlagstaff,Arizona(弗拉格斯塔夫：亚利桑那的中北部一城市)History:Establ
3、ishedin1908byPresidentTheodoreRoosevelt(西奥多．罗斯福)Area:446kmlong,29kmwideand1500mdeep;4930sqkm,withintheboundariesoftheGrandCanyonNationalParkTheGrandCanyon科罗拉多大峡谷TheGrandCanyonTheGrandCanyon SouthRimTheGrandCanyon SouthRimTheGrandCanyon NorthRimTheSouthwestTotheeastoftheGrand
4、CanyonNational,thePaintedDesertNationalPark(彩色沙漠国家公园)islocatedinthemid-northofArizona,whichisfamousformulticoloredhills(多彩的沙丘).Withinit,thereisthePetrifiedForest(石化森林国家公园),afieldoffallentreesthathaveturnedtostonebyaprocessofmineralization(矿化)knownaspetrifaction（石化）.TheSouthw
5、estthePaintedDesertNationalPark彩色沙漠PetrifiedForest石化森林PetrifiedForestTheSouthwestTothesouthoftheGrandCanyonNational,thereistheSunsetCraterVolcanoNationalPark(落日火山口国家公园)TheSouthwestTothewestoftheGrandCanyonNational,thereisHooverDam(胡佛水坝)andthelakebehindit,LakeMead(米德湖).Hoover
6、DamisamajorhydroelectricpowersupplierandisnamedafterPresidentHerbertHoover.TothenorthoftheGrandCanyonNational,thedesertareasofNevada(内华达州<美国西部内陆州>)andthemountainsandstreamsofsouthwesternColoradoarebeautiful.HooverDamthedesertareasofNevadaTheNorthwestTothefarnorthoftheGrandCa
7、nyonNational,neartheCanadianborderisYellowstoneNationalpark(黄石国家公园,大部分位于怀俄明州西北部),whichwasestablishedin1872,andistheoldestandoneofthelargestnationalparksintheUS.Itisnamedaftertheriverthatflowsthroughthearea.Itisknownforitsgeysers(间歇泉)andhotsprings.Oneofthemostfamousofthegeyse
8、rsistheOldFaithful(老忠实泉).*TothesouthoftheYellowstoneNationalparkisGrandTeto
