英语专业八级考试阅读备考训练英语专业八级考试阅读备考训练2018toconvertdefeatintovictory.以下是小编为大家搜索整理的英语专业八级考试阅读备考训练2018，希望能给大家带来帮助!更多精彩内容请及时关注我们应届毕业生考试网!Thepromiseoffindinglong-termtechnologicalsolutionstotheproblemofworldfoodshortagesseemsdifficulttofulfill.Manyinnovationsthatwereonceheavilysupportedandpublicizedhavesincefallenbythewayside.Theproposalsthemselvesweretechnicallyfeasible,buttheyprovedtobeeconomicallyunviableandtoyieldfoodproductsculturallyunacceptabletotheirconsumers.Onecharacteristiccommontounsuccessfulfoodinnovationshasbeenthat,evenwithextensivegovernmentsupport,theyoftenhavenotbeentechnologicallyadaptedorculturallyacceptabletothepeopleforwhomtheyhadbeendeveloped.Asuccessfulnewtechnology,therefore,mustfittheentiresocialculturalsysteminwhichitistofindaplace.Securityofcropyield,practicalityofstorage,andcostsaremuchmoresignificantthanpreviouslybeenrealizedbytheadvocatesofnewtechnologies.Theadoptionofnewfoodtechnologiesdependsonmorethanthesetechnicalandculturalconsiderations;economicfactorsandgovernmentalpoliciesalsostronglyinfluencetheultimatesuccessofanyinnovation.EconomistsintheAnglo-Americantraditionhavetakentheleadininvestigatingtheeconomicsoftechnologicalinnovation.Althoughtheyexaggerateinclaimingthatprofitabilityisthekeyfactorguidingtechnicalchange—theycompletelydisregardthesubstantialeffectsofculture—theyarecorrectinstressingtheimportanceofprofits.Mosttechnologicalinnovationsinagriculturecanbefullyusedonlybylargelandownersandareonlyadoptediftheseprofit-orientedbusinesspeoplebelievethattheinnovationwillincreasetheirincomes.Thus,innovationsthatcarryhighrewardsforbigagribusinessgroupswillbeadoptedeveniftheyharmsegmentsofthepopulationandreducetheavailabilityoffoodinacountry.Further,shouldanewtechnologypromisetoaltersubstantiallytheprofitsandlossesassociatedwithanyproductionsystem,thosewitheconomicpowerwillstrivetomaintainandimprovetheirownpositions.Therefore,althoughtechnicaladvancesinfoodproductionandprocessingwillperhapsbeneededtoensurefoodavailability,meet