JEFCBook3Unit11Lesson42九年级英语课件
日期：2010-12-13 12:50
abouthalftheUSAwascoveredbyforestsIn1850，theforestshavealmostgoneAlotofgoodlandhasgonewiththem，andTianjinTheGreatGreenWallalsocoverssomeoftheNorthwest(Xinjiang，toomanytreesaresillbeingcutdownintheUSA16年后，Shannxi，ThefloodofChangjiangRiverin1998Questions1）?HaveyoueverheardoftheGreatGreenWall?2)WhatdoyouknowabouttheGreatGreenWallTHEGREATGREENWALLChinahasbuiltanewGreatGreenWall，leavingonlysandToday，069，JilinandHeilongjiang)Itincludesaltogether13provinces，Qinghai，“Sanbeishelter-forest”acrossthenorthernpart，abutathirdwascoveredbyforestsToday，citiesandautonomousregionsItstotalareais4，Gansu，NingxiaandShaanxi)andthewesternpartoftheNorthwest(Liaoning，Beijing，Hebei，5010001620185050%33%THEUNITEDSTATESOFAMERICALookatthediagramItshowsuswhathashappenedtotheforestsoftheUSAinthelast350yearsIn1620，000squarekilometers，includingInnerMongolia，大兴安岭将无木可伐，whichcovers424%ofthelandofChinaThebuildingoftheGreatGreenWallwilltake73years(1978—2050)TheGreatGreenWallhasalreadysavedalotofl，
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