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1、Unit7Unit7What'sthehighestmountainintheworld?SectionA11a—1cPresentationsquaren.平方metern.米wideadj.宽的；宽阔的deepadj.深的desertn.沙漠Asian.亚洲百、千、万百hundred100onehundred200twohundred以此类推····千thousand1000onethousand2000twothousand·········英语里没有“万”这一单位，万也用thousand表示。
2、如：10000tenthousand一万20000twentythousand两万·····十万、百万十万的说法是：100.000a(one)hundredthousand200.000twohundredthousandmillion百万a(one)million1,000,000twomillion2,000,000········以此类推······8,000,000eightmillion三位数以上的数，从个位往前数，每三位数加一个逗号，从后往前数的第一个逗号代表thousand,第二个逗号代
3、表million,第三个逗号是billion，注意：这几个词不能用复数形式，后也不能加and。例如：2,648twothousand,sixhundredandforty-eight16,250,064sixteenmillion,twohundredandfiftythousand,sixty-fourLetussay9,600,0001,0256,6718,844.43ninemillionsixhundredthousandDoyouknowtheseinterestplaces?Qomolan
4、gmaQomolangmaiscoveredwithsnowalltheyearround.It’s8844.43high,thehighestintheworld.It’s26kilometerslong.mountainTheNileisthelongestriverintheworld.It’smorethan6600kilometerslong.TheNileriverTheCaspianSeaTheCaspianSeaisthedeepestsaltlakeintheworld.Itlies
5、intheborderbetweenAsiaandEurope.SaltlakeTheSaharaisthebiggestdesertintheworld.ItliesinthenorthernAfrica,.TheSaharadesertWhichisthebiggestdesertintheworld?Whichisthelongestriverintheworld?Talkaboutthesepicturesinpairs.TheNileWhichisthehighestmountaininth
6、eworld?Whichisthedeepestsaltlakeintheworld?1aMatchthefactsyouknow.Qomolangmaabout9,600,000squarekilometersinsizeTheSahara1,025metersdeepTheCaspianSea6,671kilometerslongTheNile8,844.43metershigh1bListenandcompletethesentences.1.Qomolangmais______thananyo
7、thermountainintheworld.2.TheSaharais____________desertintheworld.3.TheCaspianSeais____________ofallthesaltlakes.4.TheNileis_________riverintheworld.higherthebiggestthedeepestthelongest…8,844metershigh.…8,844米高…metershigh(long,wide…)……米高（长，宽……)。英语表示“有多长（
8、宽，高……）”时，一般将数词和数量单位放在表示长宽高的形容词前作状语。e.g.Thewallis1.7metreswide.ExplainationA:HowhighisQomolangma?B:It’s8,844metershigh.PracticeThebiggestdesertintheworldisabout8,000,000squarekilometersinsize.HowbigistheSahara?It’sabout8,000,000sq
