2019-2020年高中英语（人教大纲）第二册上：Unit10 Frightening nature(备课资料)

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1、2019-2020年高中英语（人教大纲）第二册上：Unit10Frighteningnature(备课资料)I.异国风情1.TheGrandCanyonTheGrandCanyon(大峡谷)isconsideredoneofthesevenwondersofthenaturalworld.ItisoneofAmerica'smostfamousnationalparks.Visitorstothecanyonefromallpartsoftheworld.Officialssayabout5millionpeo

2、plevisittheGrandCanyoneachyear.Thecanyonextends450kilometers.ButthesurroundingareadoesnotsuggesttheexistenceofsuchalargeopeningintheEarth.Visitorseuponthecanyonsuddenly,whentheyreachtheedge.Thentheyarelookingatalandlikenothingelseintheworld.Wallsofrockfallaw

3、aysharply.Insomeplaces，thecanyonwallsaremorethanakilometerdeep.Farbelowisthedark,turninglineoftheColoradoRiver(科罗拉多河).Ontheothersideofthecanyon,sunshinelightsuptherockwallsinred,orangeandgold.Thebrightcolorsaretheresultofmineralsintherocks.Theirappearancecha

4、ngeswiththelight,thetimeofyearsandtheweather.Atsunset,whenthesunhasmovedacrossthesky,thecanyonwallstakeonquietercolorsofblue,purple(紫色)andgreen.Hundredsofrockypointsrisefromthebottomofthecanyon.Someareverytall.Yetallarebelowthelevelofanobserverontheedge,look

5、ingover.ThereareseveralwaystoseetheGrandCanyon．Manyvisitorswalkalongpathsdownintothecanyon.Ittakesseveralhourstowalktothebottom,ittakestwotimesaslongtowalkbackup．Somevisitorsridemules(骡子)t0thebottomofthecanyonandback．Mulesarestronganimalsthatlooklikehorses．T

6、heyareknownfortheirabilitytowalkslowlyandsafelyonthepaths．ManypeopleseetheGrandCanyonbyair．Theypayahelicopterorairplanepilottoflythemaboveandaroundthecanyon．OthersseeitfromtheColoradoRiver．Theyrideboatsoverthefastmovingwater．Thesetripscanlastfromoneweektothr

7、eeweeks．America'sNationalParkServiceisinchargeofprotectingtheGrandCanyonfromtheeffectsofsomanyvisitors．Visitorsmustcarrya11wastematerialsoutofthearea．Allrocks．historicalobjects，plantsandwildlifemustbeleftuntouched．TheNationalParkServicetellsitsvisitors，“Take

8、onlyphotographs．Leaveonlyfootprints．”2．TheBirthofAnIslandSurtseywasbornin1963．Itwasagreateventforscientists．Theywereluckyenoughtoseethebirthofthisvolcanicisland．Itbeganat7：30a．m．on14thNovember．A