高级英语lesson-1-(book-2)face-to-face-with-hurricane-camille课件ppt

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1、Lesson1FacetoFacewithHurricaneCamilleTropicalstormsHurricane(theNorthAtlanticOcean):AHurricaneisatropicalstorminwhichwindsattainspeedsgreaterthan75milesperhour(120km).ThetermisoftenrestrictedtothosestormsoccurringovertheNorthAtlanticOcean.GulfofMexicoHurricaneCamilleHu

2、rricaneCamille(卡米尔号飓风):ThestormlashedMississippiandLouisianafortwodays,Aug.17-18,1969.Thedeathtollwas258andbillionsofdollarsindamage.winds:190mph（m.p.h:milesperhour）ApartmentbuildinginPassChristian,MississippibeforeandafterCamille.towncenterafterHurricaneCamilleinAugus

3、t1969HurricaneBetsy:The-stormlashedFlorida,MississippiandLouisianain1965fromSept.7-10,causingthedeathof74persons.atthetimeitwasthecostliesthurricaneinthehistoryoftheUnitedStates,and,asthefirsthurricanetocauseoverabilliondollarsindamages,earnedthenickname"Billion-Dollar

4、Betsy".HowareHurricanesNamed?heNationalWeatherServiceoftheUnitedStateshasusedgirls'namestoidentifyhurricanesintheAtlantic,Caribbean,andGulfofMexicosince1953andthenamesweregiveninalphabeticalorder.In1980ahurricanewasgivenaman'snameandwascalledHurricaneDavid.Oftenwhenanu

5、nusuallydestructivehurricanehits,thathurricane'snameisretiredandneverusedagain.Since1954,fortynameshavebeenretired.In1996HurricaneLuiswasretired.TropicalstormsTyphoon/cycloneSimilarstormsoccurringovertheWestPacificOceanandChinaSeasarecalledtyphoons.ThoseovertheIndianOc

6、eanarecalledtropicalcyclones(旋风).Tornado:alocalizedandviolentlydestructivewindstormoccurringoverlandcharacterizedbyafunnel-shapedcloudextendingtowardtheground一般只指开阔”陆地上“形成的”龙卷风“，规模一般比hurricane小。Astormisnamedwhenitreachestropicalstormstrengthwithwindsof39mph,andbecomesa

7、hurricaneortyphoonwhenitswindspeedreaches75mph.storm39m.p.hHurricane/tycoon75m.p.h.m.p.h:milesperhourtheBeaufortscale，蒲福风力等级(英国海军将领FrancisBeaufort[1774-1857]拟订,分0-12级),defineswindas:0clambreeze01lightbreeze1--3mph2slightbreeze4--73gentlebreeze8--124moderatebreeze13—185

8、freshbreeze19—246strongbreeze25--317moderategale32--388freshgale39--469stronggale47--5410wholegale55--6311storm64--75