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1、Unit7SectionAPeriod1(1a-1c)Whatisthehighestmountainintheworld?Whatisthelongestriverintheworld?WhatisthelongestriverinAsia?…Doyouknow?QomolangmatheSaharatheCaspianSeatheNiletheYangtzeRiver1aMatchthefactsyouknow.Qomolangmaabout9,600,000squarekilometersinsizeTheSahara1,025metersdeepThe
2、CaspianSea6,671kilometerslongTheNile8,844.43metershigh1bListenandcompletethesentences.1.Qomolangmais_________thananyothermountainintheworld.2.TheSaharais__________desertintheworld.3.TheCaspianSeais___________ofallthesaltlakes.4.TheNileis_________riverintheworld.higherthebiggestthede
3、epestthelongestUsetheinformationin1btomakeconversations.Writeyourchant.1cA:Whatisthehighestmountainintheworld?B:Qomolangma.Qomolangma.Qomolangma.Whatisthelongestriverintheworld?TheNile.TheNile.TheNile.Whatisthedeepestdesertintheworld?TheSahara.TheSahara.TheSahara.2aListenandnumberth
4、efacts[1-4]intheorderyouhearthem._____TheYangtzeRiverisabout_____kilometerslongandtheYellowRiveris________kilometerslong._____Chinahasthebiggestpopulationintheworld.It’salotbiggerthanthepopulationoftheUS.6,3005,0005,46430042_____Chinaisover________yearsold.Ithasamuchlongerhistorytha
5、ntheUS.TheUSisnoteven_________yearsold._____ChinaisalmostasbigastheUS,butitisthebiggestcountryinAsia.13Listenagainandfillintheblanksin2awithnumbersinthebox.2b_____TheYangtzeRiverisabout_____kilometerslongandtheYellowRiveris________kilometerslong._____Chinahasthebiggestpopulationinth
6、eworld.It’salotbiggerthanthepopulationoftheUS.6,3005,464_____Chinaisover________yearsold.IthasamuchlongerhistorythantheUS.TheUSisnoteven_________yearsold._____ChinaisalmostasbigastheUS,butitisthebiggestcountryinAsia.5,000300Makeconversationsusingtheinformationin2a.2cA:Didyouknowthat
7、Chinaisoneoftheoldestcountriesintheworld?B:Yes,Idid.It’smucholderthanmycountry.三、互动点拨1.数字的读法：1）305百位直接读，十位之前加，2）5,000千位一逗，3）305,464逗号前后照常读，百十个位依次序。4）8,844.43小数点读，小数点后直接读。5)9,600,000两个逗号名不同，右边，左。回顾比较级和最高级的用法：1）构成：在词尾加词缀/或在原形前加单词/。2）用法：a.里海比其他盐湖都要深。b.撒哈拉沙漠比任何其它沙漠都要大。c.珠穆朗玛是世界最高的山峰。3.山
8、川湖泊海漠的名称属于名词，其特征是大写
