Unit6Disasterandhope飓风是如何形成的？该如何预防飓风？下面让我们一起了解一下吧！Manypeoplelikethefeelingofthegentlewindinspring.Manypeopleliketoseethefallingleavesdancinginthewindinautumn.Butsometimes,whenthewindbecomesastorm,itcanbeverydestructive(毁灭性的)．Everyyear,majorstormscausemanyproblemsaroundtheworld.Thereisnothingpeoplecandotostopthesepowerfulforcesofnature.Butnewtechniquesarehelpingscientiststopredict(预测)how,when,andwherebigstormswillhappen.Themoreexactscientists’warningsare,thebetterpeoplecanprepareforthestorms.Predictionsareimproving.“We’vegottenbetterovertheyears,especiallythelastfewyears，”saysPhilKlotzbach,ascientistatanAmericanuniversity.Howisastormformed?Evenifscientistsknowwhereastormwillhappen,windscansuddenlychange,carryingthestormtoanewdirection.“Forahurricanetohappen,conditionshavetobejustright，”Klotzbachsays.First,theoceanwaterneedstobewarmenoughsothatitevaporates(蒸发)andrisesintotheair.Asitrises,thevaporcoolsandturnsbackintoliquid.Thisprocessgivesoffheat.Thisproducesenergylikeanenginethatcauseswindstoincrease.Itdrivestheformation(形成)ofahurricane.Ifwindspeedreaches40milesperhour,thesystemiscalled“tropicalstorm”，anditgetsaname.At75milesperhour,itbecomesahurricane.ThehurricaneseasonlastsfromJunetoNovember.NinetypercentofallhurricaneshitinAugust,September,andOctober.SectionⅠStartingout&Understandingideas重点单词阅读词汇(在不认识的单词前划√)□tuben．□hurricanen.写作词汇1．disastern.灾难，灾祸2．plusadj.(用于数字后面表示)多，余3．occurv．发生拓展词汇4．eruptv．(火山)爆发，喷发→eruptionn．火山爆发；(战争等)爆发5．immediatelyadv.即刻，马上→immediateadj.立即的；即刻的6．announcementn．通告，公告→announcevt.宣布；通告重点短语1．reactto对……作出反应2．pickup捡起，拿起3．comparedto/with和……比起来；与……相比4．makeitto及时赶到……5．lookthrough浏览6．afterall终究；毕竟重点句型nowthat＋原因状语从句：Nowthatit’shardtoavoidadisasteronEarth(既然很难在地球上避免灾难),perhapsIshouldstartthinkingaboutmovingtospace...ReadthetextonPages62－63andmatchthemainideaoftheparagraphs.1．Paragraph1A．Theauthor’sfeelingafterwalkingoutoftheTube.2．Paragraph2B．WhattheauthorfindsandfeelsbeforeenteringtheTube.3．Paragraph3C．ThestrangeideasoftheauthorintheTube.4．Paragraph4D．Theauthor’sexperienceinsidetheTube.5．Paragraph5E．Theshockingnewsaboutthedisasterfromthenewspaper.答案：1－5.BDCEAReadthetextcarefullyandchoosethebestansweraccordingtothetext.1．Whatcanwelearnfromthetext?A．ThereisavolcanoinLondoneruptingnow.B．Theworkingplacewillmovetothetopfloor.C．Theauthorwantstosellhisflatandbuyaboat.D．ThetemperatureinLondonishigherthanbefore.2．WhatdoweknowabouttheCentralLineinLondon?A．Itwasbuiltearlierthanmostoftheotherlines.B．Theairconditioningwasinventedearlythanit.C．Goingdownonthestairsishardforthepassengers.D．Itwasthehottestanddeepestontheworld’sTubesystem.3．WhydoestheauthorfeeluncomfortableintheTube?A．Becauseheiswearingasuittoday.B．Becausehehadspecialfoodforbreakfast.C．BecausehecanmakeittoBankStationsoon.D．Becausetherearemanypeopleandmuchhotair.4．WhydoestheauthorfeelgoodafterwalkingoutoftheTube?A．Becausehehasbeenworryingtoomuch.B．Becauseheismovingtospace.C．Becausehefeelscooleroutside.D．Becausehisdestinationisherenow.答案：1－4.DADCAnalyzethefollowingdifficultsentencesinthetext.1．Sureenough,goingdownthestairsandontotheplatformislikej...
