2024秋高中英语Unit5ThepowerofnatureSection2训练与检测含解析新人教版.docVIP

PAGE

PAGE1

Unit5SectionⅡ

Ⅰ.阅读理解

A

Inthesecondhalfofeachyear,manypowerfulstormsareborninthetropicalAtlanticandCaribbeanseas.Ofthese,onlyabouthalfadozengeneratethestrong,circlingwindsof75milesperhourormorethatgivethemhurricanestatus,andseveralusuallymaketheirwaytothecoast.Theretheycausemillionsofdollarsofdamage,andbringdeathtolargenumbersofpeople.

Thegreatstormsthathitthecoaststartasinnocentcirclingdisturbances(气旋)hundreds—eventhousands—ofmilesouttosea.Astheytravelaimlesslyoverwaterwarmedbythesummersun,theyarecarriedwestwardbythetradewinds.Whenconditionsarejustright,warm,moist(潮湿的)airflowsinatthebottomofsuchadisturbance,movesupwardthroughitandcomesoutatthetop.Intheprocess,themoistureinthiswarmairproducesrain，andwithittheheatisswitchedtoenergyintheformofstrongwinds.Astheheatincreases,theyounghurricanebeginstoturnaroundinacounter-clockwisemotion(逆时针方向)．

Theaveragelifeofahurricaneisonlyaboutninedays,butitcontainsalmostmorepowerthanwecanimagine.Theenergyintheheatreleased(释放)byahurricanesrainfallinasingledaywouldsatisfytheentireelectricalneedsoftheUnitedStatesformorethansixmonths.

Water,ratherthanwind,isthemainsourceofdeathanddestroyinginahurricane.Atypicalhurricanebrings6-to-12-inchdownpoursresultinginsuddenfloods.Worstofallisthepowerfulmovementofthesea—themountainsofwatermovingtowardsthelow-pressurehurricanecenter.Thewaterlevelrisesasmuchas15feetabovenormalasitmovestowardsshore.

文章大意：文章讲解并描述了飓风的形成过程——是达到每小时75英里以上的热带风暴形成的，和飓风给大自然和人类带来的巨大危害。

1．Anordinarytropicalstormiscalledahurricanewhen__B__.

A．itoccursintheCaribbeanseas

B．itswindsreach75milesperhour

C．itmakesitswaytothecoastline

D．itswindsbegintocircleonthesea

解析：细微环节理解题。依据第一段其次句可知其中只有约一半会形成至少每小时75英里的强热带气旋，这样就会形成