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1、SectionA1(1a–2d)教学目标：1语言目标：掌握本单元重点词汇及能用比较级和最高级谈论各之最。2技能目标：能听懂和谈论有关地理和自然的话题。Step1Presentation1.Newwords:squaren.平方metern.米deepadj.深的desertn.沙漠populationn.人口populationn.人口Asian.亚洲tourv.n.旅行touristn.旅行者walln.墙amazingadj.令人大为惊奇的ancientadj.古代的wideadj.宽的；宽阔和2.Showsomepicturesandinformationofthehigh
2、estmountain,thelongestriver,thebiggestriver,thebiggestlakeandthebiggestdesertintheworld.Step2Warmingup1.Watchthephotosandtalkaboutthem“Howbig/high/long/bigis…?’andhelpthestudentstoanswer:It’s…meters/kilometers/cmbig/high/long/big.2.Lookthesephotosandpracticethedialogue:e.g.A:HowhighisQomolang
3、ma?B:It’s8,844.43metershigh.Step31aMatchthefactsyouknow.Qomolangmaabout9,600,000squarekilometersinsizeTheSahara1,025metersdeepTheCaspianSea6,671kilometerslongTheNile8,844.43metershighStep4Explanation…8,844.43metershigh.8,844.43米高…metershigh(long,wide…)……米高（长,宽……)。英语表示“有多长（宽，高……）”时，一般将数词和数量单位放
4、在表示长宽高的形容词前作状语。e.g.Thewallis1.7metreswide.Step5Practiceinpairsusingtheinformationin1a.1.A:Whichisthehighestmountainintheworld?B:It’sQomolangma.2.A:HowhighisQomolangma?B:It’s8,844.43metershigh.Step6Listening1.1bListenandcompletethesentences.1)Qomolangmais______thananyothermountainintheworld.2)
5、TheSaharais____________desertintheworld.3)TheCaspianSeais____________ofallthesaltlakes.4)TheNileis_________riverintheworld.2.2aListenandnumberthefacts(1-4)intheorderyouhearthem.2bListenagainandfillintheblanksin2awiththenumbersinthebox.6,3005,0005,464300___TheYangtzeRiverisabout____kilometersl
6、ongandtheYellowRiveris___kilometerslong.___Chinahasthebiggestpopulationintheworld.It’salotbiggerthanthepopulationoftheUS.___Chinaisover___yearsold.IthasamuchlongerhistorythantheUS.TheUSisnoteven___yearsold.___ChinaisalmostasbigastheUS,butitisthebiggestcountryinAsia.Step7Practice2cMakeconversa
7、tionsinpairs.ExamplesA:DidyouknowthatChinaifoneoftheoldestcountriesintheworld?B:Yes,Idid.It’smucholderthanmycountry.Step82d1.Readtheconversationandanswerthequestions:1)Whichisthebiggestman-madeobjectintheworld？2)WhichisthemostfamouspartoftheM
