death is natural, but do you have any idea of the process阅读理解答案

《death is natural, but do you have any idea of the process阅读理解答案》由会员上传分享，免费在线阅读，更多相关内容在应用文档-天天文库。

1、Deathisnatural,butdoyouhaveanyideaoftheprocess阅读理解答案　　Deathisnatural,butdoyouhaveanyideaoftheprocessofdying?Modernscientistsdividetheprocessofdyingintotwophases---clinicalortemporarydeathandbiologicaldeath．Clinicaldeathoccurswhenthevitalorgans,suchastheheartorlungs,haveceasedt

2、ofunction,buthavenotsufferedpermanentdamage．Theorganismcanstillberevived(复活)．Biologicaldeathoccurswhenchangesintheorganismleadtothe“breakingup”ofvitalcellsandtissues．Deathisthenunchangeableandfinal．　　Scientistshavebeenseekingawaytoprolongtheperiodofclinicaldeathsothattheorgani

3、smcanremainalivebeforebiologicaldeathoccurs．Thebestmethoddevelopedsofarinvolvescoolingoftheorganism,combinedwithnarcoticsleep．Byslowingdownthebody’smetabolism(新陈代谢),coolingdelaystheprocessesleadingtobiologicaldeath．　　Toillustratehowthisworks,scientistsperformedanexperimentonas

4、ix-year-oldfemalemonkeycalledKeta．ThescientistputKetatosleepwit　　　　hanarcotic．Thentheysurroundedherbodywithice-bagsandbegancheckingherbodytemperature．Whenithaddroppedto28degreesthescientistsbegandrainingbloodfromanartery．Themonkey’sbloodpressuredecreasedandanhourlaterboththehe

5、artandbreathingstopped:clinicaldeathsetin．FortwentyminutesKetaremainedinthisstate．Hertemperaturedroppedto22degrees．Atthispointthescientistspumpedbloodintoanarteryinthedirectionoftheheartandstartedartificialbreathing．AftertwominutesKeta’sheartbecameactiveoncemore．Afterfifteenmi

6、nutes,spontaneous(自发的)breathingbegan,andafterfourhoursKetaopenedhereyesandliftedherhead．Aftersixhours,whenthescientiststriedtogiveherapenicillininjection,Ketaseizedthesyringeandranwithitaroundtheroom．Herbehaviordifferedlittlefromthatofahealthyanimal．　　24．Forapersonwhosuffersfr

7、omtheclinicaldeath,_________．　　A．hismostimportantorgansaredamaged．　　B．hestill　　　　hasthepossibilityofgettingbacktolife．　　C．hecannotavoidfinaldeath．　　D．heisstillverymuchalive　　25．Scientiststrytomakethetimeofclinicaldeathlongerinorderto__________．　　A．slowdownthebody’smetabolism．　

8、B．bringvitalcellsandtissuesbacktoactivelife．　　C．cooltheorgani