高中英语（人教大纲）第二册上：unit10 frightening nature(备课资料)

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1、ReferenceforTeachingI.异国风情1.TheGrandCanyonTheGrandCanyon(大峡谷)isconsideredoneofthesevenwondersofthenaturalworld.ItisoneofAmerica'smostfamousnationalparks.Visitorstothecanyoncomefromallpartsoftheworld.Officialssayabout5millionpeoplevisittheGrandCanyoneachyear.Thecanyonext

2、ends450kilometers.ButthesurroundingareadoesnotsuggesttheexistenceofsuchalargeopeningintheEarth.Visitorscomeuponthecanyonsuddenly,whentheyreachtheedge.Thentheyarelookingatalandlikenothingelseintheworld.Wallsofrockfallawaysharply.Insomeplaces，thecanyonwallsaremorethanakil

3、ometerdeep.Farbelowisthedark,turninglineoftheColoradoRiver(科罗拉多河).Ontheothersideofthecanyon,sunshinelightsuptherockwallsinred,orangeandgold.Thebrightcolorsaretheresultofmineralsintherocks.Theirappearancechangeswiththelight,thetimeofyearsandtheweather.Atsunset,whenthesun

4、hasmovedacrossthesky,thecanyonwallstakeonquietercolorsofblue,purple(紫色)andgreen.Hundredsofrockypointsrisefromthebottomofthecanyon.Someareverytall.Yetallarebelowthelevelofanobserverontheedge,lookingover.ThereareseveralwaystoseetheGrandCanyon．Manyvisitorswalkalongpathsdow

5、nintothecanyon.Ittakesseveralhourstowalktothebottom,ittakestwotimesaslongtowalkbackup．Somevisitorsridemules(骡子)t0thebottomofthecanyonandback．Mulesarestronganimalsthatlooklikehorses．Theyareknownfortheirabilitytowalkslowlyandsafelyonthepaths．ManypeopleseetheGrandCanyonbya

6、ir．Theypayahelicopterorairplanepilottoflythemaboveandaroundthecanyon．OthersseeitfromtheColoradoRiver．Theyrideboatsoverthefastmovingwater．Thesetripscanlastfromoneweektothreeweeks．America'sNationalParkServiceisinchargeofprotectingtheGrandCanyonfromtheeffectsofsomanyvisito

7、rs．Visitorsmustcarrya11wastematerialsoutofthearea．Allrocks．historicalobjects，plantsandwildlifemustbeleftuntouched．TheNationalParkServicetellsitsvisitors，“Takeonlyphotographs．Leaveonlyfootprints．”2．TheBirthofAnIslandSurtseywasbornin1963．Itwasagreateventforscientists．They

8、wereluckyenoughtoseethebirthofthisvolcanicisland．Itbeganat7：30a．m．on14thNovember．AfishingboatwassailingnearIce