会计学INTRODUCTIONMatchthewordswiththeirdefinitiontornadoArotatingcolumnofairfromathunderstormtotheground.龙卷风：一种纵向的气旋(qìxuán)，伴随有倒漏斗形的积雨云，涡流直径达几百码，以每小时八百公里）的速度移动，具有极大的毁坏性typhoonAviolentstormwithextremelystrongwindsandheavyrain.飓风：一种猛烈的热带风暴，形成(xíngchéng)于大西洋或加勒比海赤道地区，从形成(xíngchéng)地向北、西北或东北移动，常携有大量雨水tidalwave/tsunamilightningflood：alargeamountofwaterthatcoversanareawhichwasdrybefore.正常情况下干燥(gānzào)为陆地地区的水泛滥floodhurricanelightningthunderstormsandstormtornadoearthquaketyphoontidalwavevolcaniceruptionReadabouttheGulfSteamandcheckthemeaningofthewordsMatchthearticlewithitsmainidea.ArticleoneArticletwoArticlethreeReadthefirstpartcarefullyandanswerquestions.1.Whatisatornado?ReadthesecondpartHurricanesusuallyoccurinthePacificOcean,theCaribbeanSeaandtheGulfofMexico.There’reonaveragesixAtlantichurricaneseachyearandtheyusuallyaffecttheeastcoastoftheUSfromTexastoMaine.Hurricanescancausehugewaves,heavyrainandfloods.TheworsthurricaneofalltimeintheUSdestroyed3,000buildings.AnextraordinaryeventREADINGREADING内容(nèiróng)总结