还剩2页未读,继续阅读
文本内容:
公共英语四级考试经典阅读题训练公共英语四级考试经典阅读题训练学问就像一座大山,假如不努力攀登,永久都不会胜利以下是我为大家搜寻整理的.公共英语四级考试经典阅读题训练,期望对正在关注的您有所帮忙!更多精彩内容请准时关注我们应届毕业生考试网!Sustainable development is appliedto justabout everythingfromenergy toclean waterand economic growth,and asa resultit hasbecomedifficult toquestion eitherthe basicassumptions behindit ortheway theconcept isput touse.This isespecially truein agriculture,where sustainabledevelopmentisoften takenas thesole measureofprogress withouta properappreciation ofhistorical andculturalperspectives.To startwith,it isimportant toremember thatthe natureofagriculture haschanged markedlythroughout history,and willcontinueto doso.medieval agriculture in northernEurope fed,clothed andsheltereda predominantlyrural societywith amuch lowerpopulationdensity thanit istoday.It hadminimal effecton biodiversity,andany pollutionit causedwas typicallylocalized.In termsof energyuseand thenutrients capturedin theproduct it was relativelyinefficient.Contrast thiswith farmingsince thestart of the industrialrevolution.Competition fromoverseas ledfarmers tospecialize andincreaseyields.Throughout thisperiod foodbecame cheaper,safe andmorereliable.However,these changeshave alsoled tohabitat(栖息地)loss andto diminishingbiodiversity.Whats more,demand foranimal productsin developingcountries isgrowingso fastthat meetingit willrequire anextra300million tonsofgrain ayear by
2050.yet thegrowth ofcities andindustry isreducingthe amountof wateravailable foragriculture inmany regions.All thismeans thatagriculturein the21stcentury willhave tobevery differentfrom howitwasin the20th.thiswill requireradicalthinking.For example,we need to moveaway fromthe ideathattraditional practicesare inevitablymore sustainablethan newones.We alsoneed to abandon thenotion thatagriculture canbe〃zeroimpact’.The keywill betoabandon the rathersimple andstaticmeasures ofsustainability,which centreontheneedtomaintainproduction withoutincreasing damage.Instead weneed amore dynamicinterpretation,one thatlooks atthepros andcons(正反两方面)of allthe variousway landis used.There aremany differentways tomeasure agriculturalperformancebesides foodyield:energy use,environmental costs,water purity,carbon footprintand biodiversity.It isclear,for example,that thecarbonof transportingtomatoes fromSpain tothe UKis lessthan thatofproducing themintheUK withadditional heatingand lighting.Butwe donot knowwhether lowercarbon footprintswill alwaysbe betterforbiodiversity.What iscrucial isrecognizing thatsustainable agricultureis notjustabout sustainablefood production.
1.How dopeople oftenmeasure progressin agricultureABy itsproductivity CBy itsimpact onthe environmentBBy itssustainability DBy itscontribution toeconomicgrowth
2.Specialisation andthe effortto increaseyields haveresultedin.A Localisedpollution Ccompetition fromoverseasB theshrinking offarmland Dthe decreaseof biodiversity
3.What doesthe authorthink oftraditional farming practicesA They have remainedthe sameover thecenturies BTheyhavenotkept pacewith populationgrowthC Theyare notnecessarily sustainableD Theyareenvironmentally friendly
4.What willagriculture belike inthe21st centuryAIt willgo throughradical changesB It will supplymore animalproductsCItwillabandon traditionalfarmingpracticesD Itwill causezerodamage tothe environment5What isthe authorspurpose inwriting thispassageA Toremind peopleoftheneed ofsustainable developmentBTo suggestways ofensuring sustainablefood productionCTo advancenew criteriafor measuringfarming progressDTo urgepeople torethink whatsustainable agricultureis参考答案BDCAD文档内容到此结束,欢迎大家下载、修改、丰富并分享给更多有需要的人。