2017高考英语二轮复习 专题7 阅读理解_9

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1、类型6

2、生态环保考查要点方法技巧1.生态环保的现状，造成的影响。2．生态环境被破坏的因素，产生的后果。3．保护生态环境的措施、步骤。1.理清文章的行文结构，把握主旨大意。2．抓住造成生态环境变迁的原因这一主线。3．领会作者所透露出的观点态度。(2016·北京高考·C)CaliforniaCondor'sShockingRecoveryCaliforniacondorCaliforniacondorsareNorthAmerica'slargestbirds，withwinglengthofupto3meters.Inthe1980s，electricallinesandleadpoiso

3、ning(铅中毒)nearlydrovethemtodyingout.Now，electricshocktrainingandmedicaltreatmentarehelpingtorescuethesebigbirds.Inthelate1980s，thelastfewcondorsweretakenfromthewildtobebred(繁殖)．Since1992，therehavebeenmultiplereintroductionstothewild，andtherearenowmorethan150flyingoverCaliforniaandnearbyArizona，Uta

4、handBajainMexico.Electricallineshavebeenkillingthemoff.“Astheygointorestforthenight，theyjustdon'tseethepowerlines，”saysBruceRideoutofSanDiegoZoo.Theirwingscanbridgethegapbetweenlines，resultinginelectrocution(电死)iftheytouchtwolinesatonce.Soscientistshavecomeupwithashockingidea.Tallpoles，placedinla

5、rgetrainingareas，teachthebirdstostayclearofelectricallinesbygivingthemapainfulbutundeadlyelectricshock.Beforethetrainingwasintroduced，66%ofsetfreebirdsdiedofelectrocution.Thishasnowdroppedto18%.Leadpoisoninghasprovedmoredifficulttodealwith.Whencondorseatdeadbodiesofotheranimalscontaininglead，they

6、absorblargequantitiesoflead.Thisaffectstheirnervoussystemsandabilitytoproducebabybirds，andcanleadtokidney(肾)failureanddeath.SocondorswithhighlevelsofleadaresenttoLosAngelesZoo，wheretheyaretreatedwithcalciumEDTA，achemicalthatremovesleadfromthebloodoverseveraldays.Thisworkisstartingtopayoff.Theannu

7、aldeath8rateforadultcondorshasdroppedfrom38%in2000to5.4%in2011.Rideout'steamthinksthattheCaliforniacondors'averagesurvivaltimeinthewildisnowjustundereightyears.“Althoughthesemeasuresarenoteffectiveforever，theyarevitalfornow，”hesays.“Theyaretrulygoodbirdsthatarewortheveryeffortweputintorecoveringt

8、hem.”63．Californiacondorsattractresearchers'interestbecausethey．A．areactiveatnightB．hadtobebredinthewildC．arefoundonlyinCaliforniaD．almostdiedoutinthe1980s64．Researchershavefoundelectricallinesare．A．blockingcondors'jou