2017年大学英语四级阅读寒假练习题(14)思维导图
英语四级阅读理解是英语四级考试中的重点部分，而随着时代的发展，英语四级中的阅读题型也在不断更替改变，下面是小编为大家整理的英语四级阅读寒假练习题，希望可以为大家带来帮助。
树图思维导图提供 2017年大学英语四级阅读寒假练习题(14) 在线思维导图免费制作，点击“编辑”按钮，可对 2017年大学英语四级阅读寒假练习题(14) 进行在线思维导图编辑，本思维导图属于思维导图模板主题，文件编号是：f0d0766466b90b62eeb6d70f6955d7aa
思维导图大纲
2017年大学英语四级阅读寒假练习题(14)思维导图模板大纲
2017年大学英语四级阅读寒假练习题汇总
PassageThree
Questions31to35arebasedonthefollowingpassage.
Agrowingworldpopulationandthediscoveriesofsciencemayalterthispatternofdistributioninthefuture.Asmenslowlylearntomasterdiseases,controlfloods,preventfamines,andstopwars,fewerpeopledieeveryyear;andinconsequencethepopulationoftheworldissteadilyincreasing.In1925therewereabout2,000millionpeopleintheworld;bytheendofthecenturytheremaywellbeover4,000million.
Whennumbersrisetheextramouthsmustbefed.Newlandsmustbebroughtundercultivation,orlandalreadyfarmedmadetoyieldlargercrops.Insomeareastheaccessiblelandissointensivelycultivatedthatitwillbedifficulttomakeitprovidemorefood.Insomeareasthepopulationissodensethatthelandisparceledoutinunitstootinytoallowformuchimprovementinfarmingmethods.Werealargepartofthisfarmingpopulationdrawnoffintoindustrialoccupations,thelandmightbefarmedmuchmoreproductivelybymodernmethods.Thereisnowaraceforscience,technology,andindustrytokeeptheoutputoffoodrisingfasterthanthenumberofpeopletobefed.Newstrainsofcropsarebeingdevelopedwhichwillthriveinunfavorableclimates:therearenowfarmsbeyondtheArcticCircleinSiberiaandNorthAmerica;irrigationanddry-farmingmethodsbringaridlandsundertheplough,damsholdbackthewatersofgreatriverstoensurewaterforthefieldsinallseasonsandtoprovideelectricpowerfornewindustries;industrialchemistryprovidesfertilizerstosuitparticularsoils;aeroplanesspraycropstodestroylocustsandmanyplantdiseases.Everyyearsomenewmeansisdevisedtoincreaseortoprotectthefoodoftheworld.
31.Theauthorsaysthattheworldpopulationisgrowingbecause_____.
A)therearemanyrichvalleysandfertileplains
B)thepatternofdistributionisbeingaltered
C)peoplearelivinglonger
D)newlandisbeingbroughtundercultivation
32.Theauthorsaysthatindenselypopulatedareasthelandmightbemoreproductivelyfarmedif_____.
A)theplotsweresubdivided
B)alargepartofthepeoplemovedtoadifferentpartofthecountry
C)industrialmethodswereusedinfarming
D)theunitsoflandweremademuchlarger
33.WearetoldthattherearenowfarmsbeyondtheArcticCircle.Thishasbeenmadepossibleby_____.
A)producingnewstrainsofcrops
B)irrigationanddry-farmingmethods
C)providingfertilizers
D)destroyingpestsanddisease
34.Whichofthesewordsisnearestinmeaningtotheword"strains"?
A)typesB)sizesC)seedsD)harvests
35.Theauthor'smainpurposeisto_____.
A)argueforabeliefB)describeaphenomenonC)entertainD)proposeaconclusion
参考答案：
31-35.CDAAA
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