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1、Unit7SectionAPeriod1(1a-2d)Doyouknowhowtoreadthesenumbers?8,844.43meters1,025metersdeep6,600kilometerslong6,211.31kilometerslong3,219kilometerswide大数的读法：从右至左，每三位数加一个逗号。第一个逗号前的数为thousand，第二个逗号前的数为million（百万），第三个逗号前的数为billion（十亿）。Whichisthehighestmountaininthewo
2、rld?Whichisthelongestriverintheworld?Whichisthedeepestseaintheworld？Whichisthebiggestdesertintheworld？Doyouknowthis?QomolangmaQomolangmarunsalongtheborderbetweenChinaandNepal.Itiscoveredwithsnowalltheyearround.It’s8,844.43metershigh,thehighestintheworld.It’s26
3、kilometerslong.theSaharaTheSaharaisthebiggestdesertintheworld.ItislocatedinthenorthernAfrica.Itsclimateconditionsareverybadandisoneoftheearth'smostunsuitableforbiologicalsurvival.theCaspianSeaTheCaspianSea(里海)isthebiggestinland lakeintheworld.Themaxdepthis1,02
4、5m(inthesouthernpart).ItliesintheborderbetweenAsiaandEurope.theNileTheNileisthelongestriverintheworld.It’smorethan6,600kilometerslong.Itrunsthrough9countries.It’soneofthelargestriverflowingthroughtheinternationalstatesintheworldandrunsintotheMediterraneanSea(地
5、中海)intheend.theYangtzeRiverTheYangtzeRiveristhethirdlongestriverintheworld,andthefirstAsianriver.It’s6211.31kilometerslong.TheYangtzeRiverBasin,east-westwidthof3,219kilometers,about966kilometerswidenorth-south,passingthrough11provinces.ItrunsintotheEastSeainSh
6、anghaifinally.1aMatchthefactsyouknow.…8,844.43metershigh.…8,844米高…基数词+metershigh(long,wide,high，deep…)…米高(长，宽，高，深…)英语表示“有多长(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。Thewallis1.7meterswide.ExplanationA:HowhighisQomolangma?PracticeThebiggestdesertintheworldisabout9,60
7、0,000squarekilometersinsize.HowbigistheSahara?B:It’s8,844.43metershigh.It’sabout9,600,000squarekilometersinsize.1bListenandcompletethesentences.1.Qomolangmais_________thananyothermountainintheworld.2.TheSaharais__________desertintheworld.3.TheCaspianSeais_____
8、______ofallthesaltlakes.4.TheNileis_________riverintheworld.higherthebiggestthedeepestthelongestUsetheinformationin1btomakeconversations.1cA:Whatisthehighestmountainintheworld?B:Qo
