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1、实用文档一ThedirectrayaofthesuntouchtheequatorandstrikenorthwardtowardtheTropicofCancer.IntheSouthernhemispherewinterhasbegun,anditissummernorthoftheequator.Theseaandairgrowwarmer;thepolarairofwinterbeginsitsgradualretreat. Thenorthwardshiftofthesunalsobringstheseasonoftropicalcyclo
2、nestothenorthernhemisphere,aseasonthatisendingforthePacificandIndiaOceanssouthoftheequator.AlongourcoastsandthoseofAsia.itistimetolookseaward.toguardagainsttheseason'sstorms.OverthePacific,thetropicalcycloneseasonisneverquiteover.butvariesinintensity.Everyyear.conditionseastofth
3、ePhilippinessendascoreofviolentstormshowlingtowardAsia,butitisworstfromJunethroughOctober.SouthwestofMexico.afewPacifichurricaneswillgrowduringspringandsummer.butmostwilldieatseaorperishoverthedesertorthelowerCaliforniacoastassqualls. AlongourAtlanticandGulfcoasts.thehurricanes
4、easonisfromJunetoNovember.Inanaverageyear,therearefewerthantentropicalcyclonesandsixofthemwilldevelopintohurricanes.Thesewillkill50to100personsbetweenTexasandMaineandcausepropertydamageofmorethan$100million.Iftheyearisworsethanaverage,wewillsufferseveralhundreddeaths,andproperty
5、damagewillruntobillionsofdollars.大全实用文档 Tornadoes,floods,andseverestormsareinseasonelsewhereonthecontinent.Now,tothesedestructiveforcesmustbeaddedthehazardofthehurricane.FromtheNationalHurricaneCenterinMiami.aradarfencereacheswestwardtoTexasandnorthwardtoNewEngland.Itprovidesa2
6、00-milelookintooffshoredisturbances.InMaryland.chegiantcomputersoftheNationalMeteorologicalCenterdigestthemyriadbitsofdata-atmosphericpressure,temperature,humidity,surfacewinds.andwindsaloft-receivedfromweatherstationsandshipsmonitoringtheatmosphericsettingeachhour,everyday.Clou
7、dphotographsfromspacecraftorbitingtheeartharereceivedinMarylandandarestudiedforchetelltalespiralonthewarmingsea.ThecrewofUnitedStatesaircraftovertheGulfofMexico,Caribbean,andAtlanticwatchtheskyandwaitforthestormthatwillbearaperson'sname.Themachineryofearlywarningvibrateswithnewu
8、rgencyastheseasonofgreatstormsbegins. 测试题 1.T
