2019版高考英语一轮巩固达标练 Unit 1 Festivals around the world（含解析）新人教版必修3

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1、Unit1Festivalsaroundtheworld***阅读理解。Everyoneknowsthatdeathisnatural,butdoyouhaveanyideaoftheprocessofdying?Modernscientistsdividetheprocessofdyingintotwostages—clinicalortemporarydeathandbiologicaldeath.Clinicaldeathoccurswhenthevitalorgans,suchastheheartorlungs,havestoppedfunct

2、ioning,buthavenotsufferedpermanentdamage.Theorganismcanstillbesaved.Biologicaldeathoccurswhenchangesintheorganismleadtothe“breakingup”ofvitalcellsandtissues.Deathisthenunchangeableandfinal.Scientistshavebeenseekingawaytoprolongtheperiodofclinicaldeathsothattheorganismcanremainal

3、ivebeforebiologicaldeathoccurs.Thebestmethoddevelopedsofarinvolvescoolingtheorganism,binedwithnarcotic(麻醉)sleep.Byslowingdownthebody’smetabolism(新陈代谢),coolingdelaystheprocessesleadingtobiologicaldeath.Toshowhowthisworks,scientistsperformedanexperimentonasix-year-oldfemalemonkeyc

4、alledKeta.ThescientistputKetatosleepwithanarcotic.Thentheysurroundedherbodywithice-bagsandbegancheckingherbodytemperature.Whenithaddroppedto28degreesthescientistsbegantakingbloodoutfromanartery(动脉).Themonkey’sbloodpressuredecreasedandanhourlaterboththeheartandbreathingstopped:cl

5、inicaldeathsetin.FortwentyminutesKetaremainedinthisstate.Hertemperaturedroppedto22degrees.Atthispointthescientistspumpedbloodintoanarteryinthedirectionoftheheartandstartedartificialbreathing.AftertwominutesKeta’sheartbecameactiveoncemore.Afterfifteenminutes,spontaneous(自发的)breat

6、hingbegan,andafterfourhoursKetaopenedhereyesandliftedherhead. Aftersixhours,whenthescientiststriedtogiveherapenicillin(青霉素)injection,Ketaseizedthesyringe(注射器)andranwithitaroundtheroom. Herbehaviordifferedlittlefromthatofahealthyanimal.1.Forapersonwhosuffersfromtheclinicaldeath__

7、_______.A.he is still very much aliveB.he cannot avoid final deathC.his most important organs are damagedforeverD.hestillhasthepossibilityofgettingbacktolife2.Scientiststrytomakethetimeofclinicaldeathlongerinorderto_________.A.cool the organismB.delay the ing of biological death

8、C.slow down the body’s metabolismD.bringvitalce