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1、2014年12月大学英语六级长篇阅读匹配练习题3 GeneticallyModifiedFoods--FeedtheWorld? [A]Ifyouwanttosparkaheateddebateatadinnerparty,bringupthetopic aboutgeneticallymodifiedfoods.Formanypeople,theconceptofgeneticallyaltered,high-techcropproductionraisesallkindsofenvironm
2、ental,health,safetyandethicalquestions.Particularlyincountrieswithlongagrariantraditions--andvocalgreenlobbies--theideaseemsagainstnature. [B]Infact,geneticallymodifiedfoodsarealreadyverymuchapartofourlives.Athirdofthecornand morethanhalfthesoybeansa
3、ndcottongrownintheU.S.lastyearweretheproductofbiotechnology,accordingtotheDepartmentofAgriculture.Morethan65millionacresofgeneticallymodifiedcropswillbeplantedintheU.S.thisyear.Thegeneticisoutofthebottle. [C]Yetthereareclearlysomeveryrealissuesthatne
4、edtoberesolved.Likeanynewproductenteringthefoodchain,geneticallymodifiedfoodsmustbesubjectedtorigoroustesting.Inwealthycountries,thedebateaboutbiotechistemperedbythefactthatwehavearicharrayoffoodstochoosefrom--andasupplythatfarexceedsourneeds.Indevelo
5、pingcountriesdesperatetofeedfast-growingandunderfedpopulations;theissueissimplerandmuchmoreurgent:Dothebenefitsofbiotechoutweightherisks? [D]Thestatisticsonpopulationgrowthandhungeraredisturbing.Lastyeartheworld'spopulationreached6billion.Andby2050,t
6、heUNestimates,itwillbeprobablynear9billion.Almostallthatgrowthwilloccurindevelopingcountries.Atthesametime,theworld'savailablecultivablelandperpersonisdeclining.Arablelandhasdeclinedsteadilysince1960andwilldecreasebyhalfoverthenext50years,accordingtot
7、heInternationalServicefortheAcquisitionofAgri-BiotechApplications(ISAAA). Howcanbiotechhelp? [E]Biotechnologistshavedevelopedgeneticallymodifiedricethatisfortifiedwithbeta-carotene(胡萝卜素)--whichthebodyconvertsintovitaminA--andadditionaliron,andtheyar
8、eworkingonotherkindsofnutritionallyimprovedcrops.Biotechcanalsoimprovefarmingproductivityinplaceswherefoodshortagesarecausedbycropdamageattributiontopests,drought,poorsoilandcropviruses,bacteriaorfungi(真菌). [F]Damagecausedbypestsisincredible.
