首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
金融经济
Modern scientists divide the process of dying into two stages--clinical or te...
Modern scientists divide the process of dying into two stages--clinical or te...
admin
2020-12-24
57
问题
Modern scientists divide the process of dying into two stages--clinical or temporary death and biological death. Clinical death occurs when the vital organs, such as the heart or lungs, have ceased to function, but have not suffered permanent damage. The organism can still be revived. Biological death occurs when changes in the organism lead to the disintegration of vital cells and tissues. Death is then irreversible and final.
Scientists have been seeking a way to prolong the period of clinical death so that the organism can be revived before biological death occurs. The best method developed so far involves cooling of the organism, combined with narcotic sleep. By slowing down the body's metabolism, cooling delays the processes leading to biological death.
To illustrate how this works, scientists performed an experiment on a six-year-old female monkey called Keta. The scientists put Keta to sleep with a narcotic. Then they surrounded her body with ice-bags and began checking her body temperature. When it had dropped to 28 degrees the scientists began draining blood from its body. The monkey's blood pressure decreased and an hour later both the heart and breathing stopped; clinical death set in. For twenty minutes Keta remained in this state. Her temperature dropped to 22 degrees. At this point the scientists pumped blood into its body in the direction of the heart and started artificial breathing. After two minutes the monkey's heart became active once more. After fifteen minutes, spontaneous breathing began, and after four hours Keta opened her eyes and lifted her head. After six hours, when the scientists tried to give her a penicillin injection, Keta seized the syringe and ran with it around the room. Her behavior differed little from that of a healthy animal.
This passage focuses on ______
选项
A.the difference between biological and clinical death
B.the process of dying
C.prolonging the period of clinical death
D.the nature of clinical death
答案
C
解析
此题考查全文主旨。本文第一段介绍了死亡的两个过程——临床死亡和生物死亡,以及各自的特征。第二段讲述科学家在寻找方法尽量在生物死亡到来之前延长临床死亡,结果发现最好的办法就是冷冻法.以及冷冻法延长临床死亡的机理。第三段详细介绍一个实验.冷冻法如何延长临床死亡以使机体恢复生机。由此可知全文的焦点是如何延长临床死亡,答案为C。
转载请注明原文地址:https://ti.zuoweng.com/ti/6yR8KKKQ
相关试题推荐
根据下列内容,回答181-185题。 Modemscientistsdividetheprocessofdyingintotwosta...
ItisreportedthatsomescientistsintheUnitedStateshavefoundanew___...
Workersmaintainthatthecompany's__________toimplementmodernsafetyreg...
Whenthecopyingprocessis__________,asmall"Done"windowappearsonth...A.
Modernscientistsdividetheprocessofdyingintotwostages--clinicalorte...
Modernscientistsdividetheprocessofdyingintotwostages--clinicalorte...
WhatisNOTmentionedasapartofthechocolateproductionprocessinValbonne?
[完型填空] Manypeoplewouldagreethatstressisamajorprobleminmodern...
Modernlifeisimpossiblewithouttraveling.Thefastestwayoftravelingis...
Modernlifeisimpossiblewithouttraveling.Thefastestwayoftravelingis...
随机试题
下列选项中,不属于固定成本的是()。
住房公积金管理中心是()。
组织空间序列,需将两方面的因素统一起来。它们是()。
由四逆汤变成通脉四逆汤属于
“肺主一身之气”的含义是 A.推动气血运行B.呼出体内浊气 C.生成宗气,
制度化教育阶段开始于()。 A.古代B.现代C.近代D.中世纪
确定贫血的常用指标是A:MCH、MCV、MCHCB:RBC、MCH、RDWC:RBC、Hb、HCTD:HCT、RDW、MCHCE:MCV、RBC、MCH
鸡血藤具有的功效是A.活血补血B.利尿通淋C.续筋接骨D.消肿排脓E.消积杀虫
共用题干 某跨国公司有两项主营业务,业务A采取成本领先竞争战略,业务B采取差异化竞争战略.公司为制订下一年度各部门的绩效计划,在10月份就开始了绩效目标...
甲为一有限责任公司的小股东,不参与公司经营管理。某日,其口头向公司申请查阅和复制公司会计账簿,公司提出了下列拒绝理由,其中有可能得到人民法院支持的有()。A.