新编大学英语四级听力每日训练-第266期.docx

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新编大学英语四级听力每日训练第266期

PassageThree32.A.About1920.B.Around1925.C.Around1930.D.About1935.33.A.Over16million.B.Over3.5million.C.Over1million.D.Over2.5million.34.A.Corn.B.Soybean.C.Oat.D.Rye.35.A.Corn.B.Soybean.C.Oat.D.Rye.PassageThreeOvertheyears,newtechnologieshavechangedfarming.Changeinageneraldirectionisatrend.Yetpeopleoftenrecognizetrendsonlywhentheyconsiderthepast.Today,welookbackatsometrendsinAmericanagriculture.[32]In1920,Americahadmorethan25millionhorsesandmules.Mostwereusedforfarmwork.[32]Aroundthesametime,acompetitorbegantoappearinlargenumbers.Tractorscouldturnsoil,pullloadsandspeedharvests—andtheycoulddoitbetter.Moretractorsmeantfewerhorsesandmules.[33]Bythe1960s,thenumbersoftheseworkanimalssettledtowheretheyremaintoday.Thatisaboutone-tenththelevelsin1920.Yeteventhedemandfortractorshaditslimits.Theirnumbershavebeenslowlydecreasingsince1982.Expertssayfarmerscandomorewithlessnowbecauseofnewtechnologies.Astractorsreplacedhorsesandmules,farmersnolongerneededtoraisecropstofeedworkanimals.Oatshavelongbeenfoodforhorsesandmules.In1954,Americanfarmersplantedoversixteenmillionhectaresofoats.By2000,thatwasdowntolessthanonemillionhectares.Sowhatdidthefarmersdowiththeextraland?Moreandmorefarmersbegantoplantanewcroparoundthesametimethatthetractorbecamepopular.Itwasthesoybean.Thesoybeanisoneoftheoldestplantsharvested.YetitwasnotplantedwidelyintheUnitedStatesuntilthe1920s.Bytheyear2000,closeto30millionhectareswereplantedwithsoybeans.[34]Itisthenation'smostimportantcropforhigh-proteinanimalfeedandforvegetableoil.[35]Infact,soybeansarethesecondmostvaluablecropgrownbyAmericanfarmersaftercorn.Muchofthesoybeanproductiongoestoexports.Questions32to35arebasedonthepassageyouhavejustheard.32.Inwhichyeardidtractorsbegintoappearinlargenumbers?正确答案：A解析：短文中提到，1920年，美国用于农业生产的马、骡数量有2500多万，“同时一个竞争者开始大量出现。拖拉机……”意即1920年拖拉机开始大量涌现，故A正确。33.HowmanyhorsesandmulesdidAmericahaveinthe1960s?正确答案：D解析：短文说，1920年，美国用于农业生产的马、骡数量有2500多万，此后一路减少，到20世纪60年代，数