Unit5 The power of nature.docx
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1、Unit5ThepowerofnatureI导语I火山在地球上喷发已有数百万年了,其中五百多座火山还在喷发着,这也显示了地球本身的力气.是什么导致了火山?究竟发生了什么事?那火山带指的是什么?让我们来了解一下吧.Therearethousandsofvolcanoesallovertheworld.Whatmakesvolcanoes?VVhathappens?Theinsideoftheearthisveryhot.Bccauscitisveryveryhot,therockhasmeltedlikeice.lthasbecomeliquid,likewaler.Itisalwaysboil
2、inglikcwaterinakcttlc.Ifyouhavesconakettleboilingyouknowthatthesteamandboilingwatertrytogetout.Theveryhotmeltedrockinsidetheearthalsotriestogetout.(Jsuallyitcannotbecausetheoutsideoftheearthistoothickandstrong.Butinsomeplacestheoutsideoftheearthisthinandweak.Sonetimesacrack(asmallopening)appears.The
3、hotmeltedrock,Mhichwccall“lavapushesupthroughthecrackandburststhrough.Steanandgasshootupintotheairandthehotmeltedlavapoursout.Bigpiecesofrockmaybethrownhighintotheair.Afterawhilethevolcanobecomesquietagain.Themeltedlavabecomeshard.1.atertheSamethinghappensagainandagain.Eachtimemorehotlavapoursoutont
4、opofthecoldlavaandthenbecomeshard.Inthiswayakindofmountainisbuiltupwithaholedownthemiddle.Eerhapsthevolcanowillthenbequietandnomorelavawillburstout.Perhapsitwillstartagainhundredsofyearslater.词海拾贝1. meltv.(使)溶化,(使)熔化2. kettlen.水壶3. a四.实在的:实际的4. 加射中;射伤5. a办忧虑的;担心的6. 近.&况.惊惶:恐慌7. “保证;担保8. 洗澡答案,1.ash2.
5、suit3.actual4,shoot5.anxious6.panic7.guarantee8.batheIII.依据英语释义写出单词1. $nexttooralongthesideofsomething2. :tocarefullyconsidersomethingtoseehowusefulorvaluableitis3. :alineofraisedwaterthatmovesacrossthesurfaceofthesea4. tthepossibilitythatsomethingwilldevelopinacertainway,orhaveaparticulareffect5. t
6、tochoosesomeoneforapositionorajob6. xallthespecialtools,machines,clothesetcthatyouneedforaparticularactivity答案:1.alongside!.evaluate3.wave4.potential5.appoint6.equipmentN.选用短语的适当形式完成句子compare.with:ProtCCtfrom;beappointedas.:makeonesway;bumtotheground;aswellas;fastasleep;beaboutto1. You,dbetterofteny
7、ourhandwritingothers,.答案8comparewith2. Achemistryfactoryinthefire.答案:wasburnttotheground3. He.ChairmanoftheStudentsUnioninourschool.答案:hasbeen/WaSappointedas4. Thoughitwasraining,thesoldiersthevillage.答案:weremakingtheirwayto5. WhenIcamehome,myfatherwas.答案ifastasleep6. Ithestationtopickhimupwhenhetel
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