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1、母题八阅读理解（科普阅读）【母题来源一】【2016·北京】【母题原题】【2016·北京】CCaliforniaCondor’sShockingRecoveryCaliforniacondorsareNorthAmerica’slargestbirds,withwing-lengthofupto3meters.Inthe1980s,electricallinesandleadpoisoning(铅中毒)nearlydrovethemtodyingout.Now,electricshocktraini
2、ngandmedicaltreatmentarehelpingtorescuethesebigbirds.Inthelate1980s,thelastfewcondorsweretakenfromthewild,andtherearenowmorethan150flyingoverCaliforniaandnearbyArizona,UtahandBajainMexico.Electricallineshavebeenkillingthemoff.“Astheygointorestfortheni
3、ght,theyjustdon’tseethepowerlines,”saysBruceRideoutofSanDiegoZoo.Theirwingscanbridgethegapbetweenlines,resultinginelectrocution(电死)iftheytouchtwolinesatonce.Soscientistshavecomeupwithashockingidea.Tallpoles,placedinlargetrainingareas,teachthebirdstost
4、ayclearofelectricallinesbygivingthemapainfulbutundeadlyelectricshock.Beforethetrainingwasintroduced,66%ofset-freed-13-condorsdiedofelectrocution.Thishasnowdroppedto18%.Leadpoisonoushasprovedmoredifficulttodealwith.Whencondorseatdeadbodiesofotheranimal
5、scontaininglead,theyabsorblargequantitiesoflead.Thisaffectstheirnervoussystemsandabilitytoproducebabybirds,andcanleadtokidney(肾)failuresanddeath.SocondorswithhighlevelsofleadaresenttoLosAngelesZoo,wheretheyaretreatedwithcalciumEDTA,achemicalthatremove
6、sleadfromthebloodoverseveraldays.Thisworkisstartingtopayoff.Theannualdeathrateforadultcondorshasdroppedfrom38%in2000to5.4%in2011.Rideout’steamthinksthattheCaliforniacondors’averagesurvivaltimeinthewildisnowjustundereightyears.“Althoughthesemeasuresare
7、noteffectiveforever,theyarevitalfornow,”hesays.“Theyaretrulygoodbirdsthatarewortheveryeffortweputintorecoveringthem.”63.Californiacondorsattractresearchers’interestbecausethey.A.areactiveatnightB.hadtobebredinthewildC.arefoundoninCaliforniaD.almostdie
8、doutinthe1980s64.Researchershavefoundelectricallinesare.A.blockingcondors’journeyhomeB.bigkillersofCaliforbniacondorasC.restplacesforcondorsatnightD.usedtokeepcondorsaway65.AccordingtoParaghaph5,leadpoisoning.A.makescondorstoonervoustoflyB.has
