托福阅读考试真题及答案.docx

托福阅读考试真题及答案

在社会的各个领域，只要有考核要求，就会有试题，借助试题可以更好地考核参考者的知识才能。那么你知道什么样的试题才能有效帮助到我们吗？下面是小编精心整理的托福阅读考试真题及答案，欢迎阅读，希望大家能够喜欢。Duringthesecondhalfofthenineteenthcentury,theproductionoffoodandfeedcropsintheUnitedStatesroseatanextraordinarilyrapidrate.Cornproductionincreasedbyfourandahalftimes,haybyfivetimes,oatsandwheatbyseventimes.Themostcrucialfactorbehindthisphenomenalupsurgeinproductivitywasthewidespreadadoptionoflabor-savingmachinerybynorthernfarmers.By1850horse-drawnreapingmachinesthatcutgrainwerebeingintroducedintothemajorgrain-growingregionsofthecountry.Horse-poweredthreshingmachinestoseparatetheseedsfromtheplantswerealreadyingeneraluse.However,itwastheonsetoftheCivilWarin1861thatprovidedthegreatstimulusforthemechanizationofnorthernagriculture.Withmuchofthelaborforceinductedintothearmyandwithgrainpricesontherise,northernfarmersrushedtoavailthemselvesofthenewlabor-savingequipment.In1860therewereapproximately80,000reapersinthecountry;fiveyearslatertherewere350,000.Afterthecloseofthewarin1865,machinerybecameevermoreimportantinnorthernagriculture,andimprovedequipmentwascontinuallyintroduced.By1880aself-bindingreaperhadbeenperfectedthatnotonlycutthegrain,butalsogatheredthestalksandboundthemwithtwine.Threshingmachineswerealsobeingimprovedandenlarged,andafter1870theywereincreasinglypoweredbysteamenginesratherthanbyhorses.Sincesteam-poweredthreshingmachineswerecostlyitems—runningfrom$1,000to$4,000—theywereusuallyownedbycustomthresherownerswhothenworkedtheirwayfromfarmtofarmduringtheharvestseason."Combines"werealsocomingintouseonthegreatwheatranchesinCaliforniaandthePacificNorthwest.Theseponderousmachines—sometimespulledbyasmanyas40horses—reapedthegrain,threshedit,andbaggedit,allinonesimultaneousoperation.Theadoptionoflabor-savingmachineryhadaprofoundeffectuponthesaleofagriculturaloperationsinthenorthernstates—allowingfarmerstoincreasevastlytheircropacreage.Bytheendofcentury,afarmeremployingthenewmachinerycouldplantandharvesttwoandhalftimesasmuchcornasafarmerhadusinghandmethods50y