资源描述：
《河北省邢台市高中英语Unit4Globalwarming单元检测卷新人教版选修6》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、Unit4GlobalwarmingACaliforniaCondor"sShockingRecoveryCaliforniacondorsareNorthAmerica"slargestbirds,withwind-lengthofupto3meters.Tnthe1980s,electricallinesandleadpoisoning（铅中看）near]ydrovethemtodyingout・Now,electricshocktrainingandmedicaltreatmentarehelpingtorescuethesebigbirds・Int
2、helate1980s,thelastfewcondorsweretakenfromthewild,andtherearenowmorethan150flyingoverCaliforniaandnearbyArizona,UtahandBajainMexico-Electricallineshavebeenki1lingthemoff."Astheygointorestforthenight,theyjustdon'tseethepowerlines,”saysBruceRideoutofSanDiegoZoo.Theirwingscanbridgeth
3、egapbetweenlines,result!nginelectrocution（电夕匕）iftheytouchtwolinesatonce.Soscientistshavecomeupwithashockingidea.Tallpoles,placedinlargetrainingareas,teachthebirdstostayclearofelectrical1inesbygivingthemapainfulbutundeadlyelectricshock.Beforethetrainingwasintroduced,66%ofset-freedc
4、ondorsdiedofelectrocution・Thishasnowdroppedto18%・Leadpoisonoushasprovedmoredifficulttodealwith.Whencondorseatdeadbodiesofotheranimalscontaininglead,theyabsorblargequantitiesoflead.Thisaffectstheirnervoussystemsandabilitytoproducebabybirds,andcanleadtokidney（肾）failuresanddeath.Soco
5、ndorswithhighlevelsofleadaresenttoLosAngelesZoo,wheretheyaretreatedwithcalciumEDTA,achemicalthatremovesleadfromthebloodoverseveraldays.Thisworkisstartingtopayoff.Theannualdeathrateforadultcondorshasdroppedfrom38%in2000to5.4%in2011.Rideout'steamthinksthattheCaliforniacondorsaverage
6、survivaltimeinthewildisnowjustundereightyears・"Althoughthesemeasuresarenoteffectiveforever,theyarevitalfornow,”hesays・“Theyaretrulygoodbirdsthatarewortheveryeffortweputintorecoveringthem・”1.Californiacondorsattractresearchers'interestbecausethey•A.areactiveatnightB.hadtobebredinth
7、ewildC・arefoundoninCaliforniaD.almostdiedoutinthe1980s1.Researchershavefoundelectricallinesare.A.blockingcondors'journeyhomeB.bigkillersofCaliforniacondorsC・restplacesforcondorsatnightD.usedtokeepcondorsaway2.AccordingtoParagraph5,leadpoisoning.A.makescondorstoonervoustoflyB.hasli
8、ttieeffectoncondorskidneysC・canha
