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文件名称:致用英语 阅读教程(第二版)下册 教学课件Unit 6 Natural Disaster.ppt
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更新时间:2025-05-17
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Unit6NaturalDisasters

LearningObjectivesStarterPassageAPassageBCONTENTSReadingSkillsSupplementaryReading

LearningObjectivesAfterstudyingthisunit,you’llbeabletoenlargeyourvocabularybygettingintothehabitofdailyreading;appreciatethestyleofexpositioninEnglishwriting;knowmoreaboutnaturaldisastersandlearnsomeskillstoprotectyourself.

StarterNaturaldisastersaremajoradverseeventsresultingfromnaturalprocessesoftheearth,

examplesincludefloods,hurricanes,tornadoes,earthquakes,etc.Anaturaldisastercancauselossofpropertydamage,andtypicallyleavessomeeconomicdamageinitswake,the

severityofwhichdependsontheaffectedpopulation’sresilienceandalsoontheinfrastructureavailable.

1.Howmanynaturaldisastersdoyouknow?2.Doyouknowanyskillstoprotectyourselfincaseofanaturaldisaster?

NaturalDisastersPassageADoyouknow?SnowstormEarthquakeVolcanoWildfireTornado

PassageADoyouknow?Atornadoisaviolent,rotatingcolumnofairwhichisincontactwithboththesurfaceoftheearthandacumulonimbuscloudor,inrarecases,thebaseofacumuluscloud.Tornadoescomeinmanysizesbutaretypicallyintheformofavisiblecondensationfunnel,whosenarrowendtouchestheearthandisoftenencircledbyacloudofdebris.

PassageADoyouknow?Avolcanoisanopening,orrupture,inaplanetssurfaceorcrust,whichallowshot,moltenrock,ash,andgasestoescapefrombelowthesurface.Volcanicactivityinvolvingtheextrusionofrocktendstoformmountainsorfeatureslikemountainsoveraperiodoftime.Volcanoesaregenerallyfoundwheretectonicplatesaredivergingorconverging.

PassageADoyouknow?Awildfireisanyuncontrolled,non-structurefirethatoccursinthewilderness,wildland,orbush.Wildfiresarecommoninvariouspartsoftheworld,occurringincycles.Theyareoftenconsideredbeneficialtothewilderness,asmanyplantspeci