高考英语-概要写作--公开课

阅读下面短文，根据其内容写一篇60词左右的内容概要。Feedingtheworld’spopulationisabigchallenge,anditisabouttogetbigger.Rightnow,alittlemorethan7.3billionpeoplesharetheplanet.By2050,somescientistsestimate,theworld’spopulationmayreach9billion.However,thechangingclimatewillprobablymakefeedingthisfargreaternumberaveryfrighteningtask.Thatistheconclusionreachedbysomescientists.Justthreecrops—wheat,riceandcorn—providemorethantwo-thirdsofthecaloriesthatpeopleconsume.Suchcrops,andasmallnumberofotherimportantcrops,comefromfarmingregionssometimesreferredtoas“breadbaskets”.However,theseareasoftenoccupyarelativelysmallportion(部分)oftheglobe.Worsestill,thebreadbasketsareeasilyaffectedbybadweather.Eventssuchaswidespreadfloodingorextendedheatwavecankillcrops.That’sespeciallytrueifthebadweatheroccurswhenacropisyoung,fruitingorapproachingharvest.Unfortunately,bigcropfailuresintwoormorebreadbasketscouldleadtowhatresearcherscalla“foodshock”.Thatmeansanoverallshortageoffoodwouldoccur.Extremefoodshocksusedtohappeneverycentury.Ortoputitanotherway,that’sonlyaboutonceinveryfourgenerationsofhumans.However,accordingtostudies,astheclimatewarms,highandlowtemperaturesbecomemoreextreme,andby2050,foodshockscouldoccuraboutonceevery30years.Inotherwords,apersonborninthemiddleofthecurrentcenturymightlivethroughtwoorthreeextremefoodshocksduringtheirlifetime.Sowhatcanpeopledotohelpavoidfoodshocks?Makingagricultureefficientisonechoice.Butoneofthemosteffectivewaystofightagainstfoodshocksmightbetocutdownonfoodwaste.“Ifwecouldcutfoodwasteinhalf,”saidSethCook,aBritishenvironmentalscientist,“wecouldfeedanextrabillionpeople.”3.addsometransitionalwordstomakethepassagesmooth.1.Findoutkeyinformationofeachpara.2.RewritethekeyinformationExpressthesamemeaningusingyourownwords,phrasesorstructures.Concise!!!60-70wordsStep1:Carefulreadingforthekeywords,phrasesorsentencesineachparagraphUnderlineorcirclethekeyinformationPara.1:Feedingtheworld’spopulationisabigchallenge,anditisabouttogetbigger.Rightnow,alittlemorethan7.3billionpeoplesharetheplanet.By2050,somescientistsestimate,theworld’spopulationmayreach9billion.However,thechangingclimatewillprobablymakefeedingthisfargreaternumberaveryfrighteningtask.Thatistheconclusionreachedbysomescientists.Para.1:Feedingtheworld’spopulationisabigchallenge,anditisabouttogetbigger.Rightnow,alittlemorethan7.3billionpeoplesharetheplanet.By2050,somescientistsestimate,theworld’spopulationmayreach9billion.However,thechangingclimatewillprobablymakefeedingthisfargreaternumberaveryfrighteningtask.Thatistheconclusionreachedbysomescientists.Para.1:Feedingtheworld’spopulationisabigchallenge,anditisabouttogetbigger.Rightnow,alittlemorethan7.3billionpeoplesharetheplanet.By2050,somescientistsestimate,theworld’spopulationmayreach9billion.However,thechangingclimatewillprobablymakefeedingthisfargreaternumberaveryfrighteningtask.Thatistheconclusionreachedbysomescientists.Para.1:Feedingtheworld’spopulationisabigchallenge,anditisabouttogetbigger.Rightnow,alittlemorethan7.3billionpeoplesharetheplanet.By2050,somescientistsestimate,theworld’spopulationmayreach9billion.However,thechangingclimatewillprobablymakefeedingthisfargreaternumberaveryfrighteningtask.Thatistheconclusionreachedbysomescientists.Para.2:Justthreecrops—wheat,riceandcorn—providemorethantwo-thirdsofthecaloriesthatpeopleconsume.Suchcrops,andasmallnumberofotherimportantcrops,comefromfarmingregionssometimesreferredtoas“breadbaskets”.However,theseareasoftenoccupyarelativelysmallportion(部分)oftheglobe.Worsestill,thebreadbasketsareeasilyaffectedbybadweather.Eventssuchaswidespreadfloodingorextendedheatwavecankillcrops.That’sespeciallytrueifthebadweatheroccurswhenacropisyoung,fruitingorapproachingharvest.Para.2:Justthreecrops—wheat,riceandcorn—providemorethantwo-thirdsofthecaloriesthatpeopleconsume.Suchcrops,andasmallnumberofotherimportantcrops,comefromfarmingregionssometimesreferredtoas“breadbaskets”.However,theseareasoftenoccupyarelativelysmallportion(部分)oftheglobe.Worsestill,thebreadbasketsareeasilyaffectedbybadweather.Eventssuchaswidespreadfloodingorextendedheatwavecankillcrops.That’sespeciallytrueifthebadweatheroccurswhenacropisyoung,fruitingorapproachingharvest.Para.2:Justthreecrops—wheat,riceandcorn—providemorethantwo-thirdsofthecaloriesthatpeopleconsume.Suchcrops,andasmallnumberofotherimportantcrops,comefromfarmingregionssometimesreferredtoas“breadbaskets”.However,theseareasoftenoccupyarelativelysmallportion(部分)oftheglobe.Worsestill,thebreadbasketsareeasilyaffectedbybadweather.Eventssuchaswidespreadfloodingorextendedheatwavecankillcrops.That’sespeciallytrueifthebadweatheroccurswhenacropisyoung,fruitingorapproachingharvest.Para.3:Unfortunately,bigcropfailuresintwoormorebreadbasketscouldleadtowhatresearcherscalla“foodshock”.Thatmeansanoverallshortageoffoodwouldoccur.Extremefoodshocksusedtohappeneverycentury.Ortoputitanotherway,that’sonlyaboutonceinveryfourgenerationsofhumans.However,accordingtostudies,astheclimatewarms,highandlowtemperaturesbecomemoreextreme,andby2050,foodshockscouldoccuraboutonceevery30years.Inot