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2016年6月英语四级考试:仔细阅读练习(12)思维导图

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查看详情2016年6月英语四级考试:仔细阅读练习(12)思维导图

  Modern scientists divide the process of dying into two stages—clinical or (emporary death and biological death. Clinical death occurs when the vital organs, such as the heart or

树图思维导图提供 2016年6月英语四级考试:仔细阅读练习(12) 在线思维导图免费制作,点击“编辑”按钮,可对 2016年6月英语四级考试:仔细阅读练习(12)  进行在线思维导图编辑,本思维导图属于思维导图模板主题,文件编号是:10d94154222d7ca6b62b9f578cda8d93

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2016年6月英语四级考试:仔细阅读练习(12)思维导图模板大纲

Modernscientistsdividetheprocessofdyingintotwostages—clinicalor(emporarydeathandbiologicaldeath.Clinicaldeathoccurswhenthevitalorgans,suchastheheartorlungs,haveceasedtofunction,buthavenotsufferedpermanentdamage.Theorganismcanstillberevived(复活).Biologicaldeathoccurswhenchangesintheorganismleadtothedisintegration(解体)ofvitalcellsandtissues.Deathisthenirreversibleandfinal.

Scientistshavebeenseekingawaytoprolongtheperiodofclinicaldeathso(hattheorganismcanberevivedbeforebiologicaldeathoccurs.Thebestmethoddevelopedsofarinvolvescoolingoftheorganism,combinedwithnarcotic(麻醉的)sleep.Byslowingdownthebody'smetabolism(新成代谢),coolingdelaystheprocessesleadingtobiologicaldeath.

Toillustratehowthisworks,scientistsperformedanexperimentonasix-year-oldfemalemonkeycalledKeta.ThescientistsputKetatosleepwithanarcotic.Thentheysurroundedherbodywithice-bagsandbegancheckingherbodytemperature.Whenithaddroppedto28degreesthescientistsbegandrainingbloodfromanitsbody.Themonkey'sbloodpressuredecreasedandanhourlaterboththeheartandbreathingstopped;clinicaldeathsetin.FortwentyminutesKetaremainedinthisstate.Hertemperaturedroppedto22degrees.Atthispointthescientistspumpedbloodintoitsbodyinthedirectionoftheheartandstartedartificialbreathing.Aftertwominutesthemonkey'sheartbecameactiveoncemore.Afterfifteenminutes,spontaneousbreathingbegan,andafterfourhoursKetaopenedhereyesandliftedherhead.Aftersixhours,whenthescientiststriedtogiveherapenicillininjection,Ketaseizedthesyringeandranwithitaroundtheroom.Herbehaviordifferedlittlefromthatofahealthyanimal.

26.Thispassagefocuseson_______.

A.thedifferencebetweenbiologicalandclinicaldeath.

B.theprocessofdying

C.prolongingtheperiodofclinicaldeath

D.thenatureofclinicaldeath

27.Thebeststatementofthemainideaofthispassageisthat_______.

A.modemscientistsdividetheprocessofdyingintoclinicalandbiologicaldeath

B.biologicaldeathoccurswhenvitalorganshavesufferedpermanentdamage

C.scientistshavefoundawaytoprolongtheperiodofclinicaldeath

D.coolingdelaystheprocessesleadingtobiologicaldeath

28.Onecharacteristicofclinicaldeathis______.

A.lastingdamagetothelungsB.destructionofthetissues

C.temporarynon-functioningoftheheartD.thattheorganismcannotberevived

29.Accordingtothepassage,coolinganorganism_______.

A.speedsupthebody'smetabolismB.slowsdisintegrationofbodytissues

C.preventsdamagetoorgansD.revivesdamagedorgans

30.Onepossiblebenefitoftheexperimentdiscussedinthepassageis______.

A.lesscrowdedcitiesB.victoryoverdeath

C.protectionagainstfatalinjuryD.fewerdeathsfromheartattacks

答案:26.C27.C28.C29.B30.D

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