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1、unit7What’sthehighestmountainintheworld?Period1a-1cObjectivesTolearntocomparefactsTolearntoexpresslargenumbersTolearntotalkaboutgeographyandnatureTolearnnewwords:square,meter,deep,desert,population,Asia,tour,tourist,wall,ancient,protect,wide…Whichisthehighestmountainin
2、theworld?Whichisthelongestriverintheworld?WhichisthedeepestriverinAsia?…Doyouknow?QomolangmarunsalongtheborderbetweenChinaandNepal.Itiscoveredwithsnowalltheyearround.It’s8844.43high,thehighestintheworld.It’s26kilometerslong.TheNileisthelongestriverintheworld.It’smoreth
3、an6600kilometerslong.Itrunsthrough9countries,it’soneofthelargestriverflowsthroughtheinternationalstatesintheworldandrunsintotheMediterraneanSea(地中海)intheend.TheCaspianSeaisthebiggestlakeintheworld.ItliesintheborderbetweenAsiaandEurope.TheSaharaisthebiggestdesertinthewo
4、rld.ItislocatedinthenorthernAfrica,climateconditionsareverybad,isoneoftheearth'smostnotsuitableforbiologicalsurvival.TheYangtzeRiveristhethirdlongestriverintheworld,thefirstAsianrivers.It’s6211.31kilometerslong.TheYangtzeRiverBasin,east-westwidthof3219kilometers,about9
5、66kilometerswidenorth-south,passingthrough11provinces.ItrunsintotheEastSeainShanghaifinally.Matchthefactsyouknow.1aQomolangmaHowhighisit?Itisabout__________metershigh.8,844…8,844metershigh.…8,844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在表示长宽高的形
6、容词前作状语。e.g.Thewallis1.7metreswide.ExplainationHowtoreadlargenumbers?Howtosaythesenumbers?4563,041106299,0001,823,600onehundredsixfourhundredandfiftysixthreethousandfortyonetwothousandandnintyninehundredonemillioneighthundredandtwentythreethousandsixhundredA:HowhighisQo
7、molangma?B:It’s8,844metershigh.PracticeThebiggestdesertintheworldisabout8,000,000squarekilometersinsize.HowbigistheSahara?It’sabout8,000,000squarekilometersinsize.Listenandcompletethesentences.Qomolangmais_________thananyothermountainintheworld.2.TheSaharais__________d
8、esertintheworld.3.TheCaspianSeais___________ofallthesaltlakes.4.TheNileis_________riverintheworld.higherthebiggestthe
