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1、专题限时训练(二十七) [史地常识型阅读理解(一)](限时：25分钟)(一)Evenplantcanrunafever,especiallywhenthey’reunderattackbyinsectsordisease.Butunlikehuman,plantscanhavetheirtemperaturetakenfrom3,000feetawaystraightup.Adecadeago,adoptingtheinfrared(红外线)scanningtechnologydevelopedformilitar
2、ypurposesandothersatellites,physicistStephenPaleycameupwithaquickwaytotakethetemperatureofcropstodeterminewhichonesareunderstress.Thegoalwastoletfarmerspreciselytargetpesticide(杀虫剂)sprayingratherthanrainpoisononawholefield,whichinvariablyincludesplantsthatdon’
3、thavepest(害虫)problems.Evenbetter,Paley’sRemoteScanningServicesCompanycoulddetectcropproblemsbeforetheybecamevisibletotheeye.Mountedonaplaneflownat3,000feetatnight,aninfraredscannermeasuredtheheatemittedbycrops.Thedataweretransformedintoacolorcodedmapshowingwhe
4、replantswererunning“fevers”.Farmerscouldthenspotspray,using50to70percentlesspesticidethantheyotherwisewould.ThebadnewsisthatPaley’scompanycloseddownin1984,afteronlythreeyears.Farmersresistedthenewtechnologyandlongtermbackerswerehardtofind.Butwiththerenewedconc
5、ernaboutpesticidesonproduce,andrefinementsininfraredscanning,Paleyhopestogetbackintooperation.Agricultureexpertshavenodoubtthetechnologyworks.“Thistechniquecanbeusedon75percentofagriculturallandintheUnitedStates，”saysGeorgeOertherofTexasA&M.RayJackson,whorecen
6、tlyretiredfromtheDepartmentofAgriculture,thinksremoteinfraredcropscanningcouldbeadoptedbytheendofthedecade.ButonlyifPaleyfindsthefinancialbackingwhichhefailedtoobtain10yearsago.( )1.Plantswillemitanincreasedamountofheatwhentheyare________A．sprayedwithpesticid
7、esB．facinganinfraredscannerC．inpoorphysicalconditionD．exposedtoexcessivesunrays( )2.Inordertoapplypesticidesprayingprecisely,wecanuseinfraredscanningto________.A．estimatethedamagetothecrops7用心爱心专心B．measurethesizeoftheaffectedareaC．drawacolorcodedmapD．locateth
8、eproblemarea( )3.Farmerscansaveaconsiderableamountofpesticideby________.A．resortingtospotsprayingB．consultinginfraredscanningexpertsC．transformingpoisonedrainD．detectingcropproble
