Unit4SectionA3a3d课件人教版英语八年级下册

UnitFourTheWondersofNatureSecA3a-3d

What’sthehighestmountainintheworld?It’stheMountQomolangma.What’sthebiggestdesert

intheworld?It’stheSaharaDesert.What’sthelowestplaceonearth?It’stheDeadSea.What’sthelongestriver

intheworld?It’stheNile.What’sthedeepestpointintheocean?It’stheMarianaTrench.Let’scontinuetotravelandexploretheamazingnature!Couldyoutellmemoreabouttherivers?BothofthemplayanimportantroleinChinesehistory,culture,transportation(交通)andagriculture(农业).TheyaresymbolsofancientChinesecivilization.Andthey’restillveryimportanttoday.Whatisthelongestriver

inAsia?Whatis

thesecondlongestriverinChina?NileRiveristhelongestriver

intheworld.Itisabout6,650kilometerslongandrunsthrough11countriesinnortheasternAfrica,likeEgyptandSudan.Forthousandsofyears,ithasgivenpeoplewaterandgoodsoilforfarming,soitisveryimportantforlifeinthisarea.1.WheredidEllagoonhertrip?2.HowwasElla’strip?3.Howmanyriversarementionedintheconversation?5,464ChinaEgypt6,671civilizationsRiverNameKeyFacts/ImportanceTheYellowRiverIt’s___________longandisthe___________longestinChina;It’syellowbecauseitcarries______________________;It’sknownasChina’s“________river”.TheYangtzeRiverThe______riverinChina-about________long;Ittravelsthe_______.TheNileThelongestriver_____________;It’simportantin_________history;Ithelpeddevelop___________________liketheyellowriver.5,464kmsecondbrownandyellowearthmotherlongestintheworldEgypt’s

ancientcivilizations6,300kmfarthest1.流经的距离最远2.第二长3.顺便说一下4.了解/学习……5.……和……都

6.古代文明7.发展（withthedevelopmentof/developed/developing)8.保护9.不惜一切代价（means）Canyoufindtheexpressionsintheconversation?byallmeansYaming:Welcomeback,Ella!Howwasyourtrip?Ella:Itwasgreat!WesawtheHukouWaterfallontheYellowRiver.IsthatthelongestriverinChina?Yaming:No,theYangtzeRiveristhelongestriverinChina.Ittravelsthefarthestandisabout6,300kilometreslong.TheYellowRiveris5,464kilometreslongandisthesecondlongest.Bytheway,doyouknowwhyit'scalledtheYellowRiver?Ella:Becauseit'syellow?Yaming:Right.Somepartsoftherivercarrybrownandyellowearth.Ella:That'sinteresting!Ilikelearningaboutrivers.MyfavouriteistheNile.Didyouknowit'sthelongestriverintheworld?Yaming:Yes,it's6,671kilometreslong.It'sveryimportantinEgypt'shistory.Ella:That'sright.BoththeNileandtheYellowRiverhelpedancientcivilizationstodevelop.Andthey'restillveryimportanttoday.Yaming:Yes.InChina,weevencalltheYellowRiverour"motherriver"!Ella:Weshouldprotectthematallcosts.3dImaginethatyouareYamingorElla.ContinuetheconversationwithapartneraboutothergeographicalfeaturesinChina.Ella:CouldyoutellmemoreaboutChina,Yaming?Yaming:Sure!Whatwouldyouliketoknow?Ella:What’sthebiggestdesertinChina?Yaming:It’stheTaklimakanDesert(塔克拉玛干沙漠).Ella:Doyouknow...?CouldyoutellmemoreaboutChina,Yaming?Sure!Whatwouldyouliketoknow?What’sthebiggestdesertin

China?What’sthelowestplaceonearth?What’sthehighestmountainintheworld?What’sthedeepestpointintheocean?It’stheTaklimakanDesert/theDeadSea/theMountQomolangma/theMarianaTrenchDoyouknow

howbigtheTaklimakanDesert

is?HowlowistheDeadSea?HowhighisMountQomolangma?HowdeepistheMarianaTrench?It’sabout337,600squarekilometersinsize.TheDeadSeaisabout416metersbelowsealevel.MountQomolangmais8,848.86metershigh.TheMarianaTrenchisabout11,000metersdeep/indepth.Whyshouldweprotecttheriversatallcosts?

=byallmeansBecausetheYellowRiverisour“motherriver”,it’simportantforcivilizationandpeople’sdailylife.Butnow,riversaresodirty.Duetopollution,thelivingconditionsoffisharebad.Theyriskdyingandcannotsurvive,andtheirdeathtellsusweneedtoprotectourenvironment.stoppouringwasteintoriversreducechemicaluseplanttreesalongriverbanksConnectuswellwiththenature!carry

civilization

atallcosts

partof

far1.Timchosethe____________seatfromthedoor.

2.Tohaveacomfortablelivingenvironment，weshouldprotecttheearth________________.

3.Lastweek，westudieddifferent_____________inhistoryclass.

4.Youhaveto____________aphonesothatwecancallyouatanytime.

5.Youcanspend________thedaydoingexerciseandplayingsport.

farthestatallcostscivilizationscarrypart

of用方框中所给词语的适当形式填空Let’spractice1.ThemainpurposeofhisholidaytoGreecewastogo________(dive).2.Ourschoollibraryisthe________(large)oneinthedistrict,withalotofdifferentkindsofbooks.3.The________(deep)oftheswimmingpoolistwometres,soyouneedtobecareful.4.TheDeadSeaisthe________(low)placeon