2. 职称英语
  3. Modern scientists divide the process of dying into two phases—clinical or te

Modern scientists divide the process of dying into two phases—clinical or te

游客2025-03-21  11
问题     Modern scientists divide the process of dying into two phases—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 reanimated before biological death occurs. The best method developed so far involves cooling of the organism, combined with narcotic (麻醉的,催眠的) sleep. By slowing down the body’s metabolism, cooling delays the processes leading to biological death.
    To illustrate how this works, scientists performed and experimented on a six-year-old female baboon (狒狒) 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 an artery. The monkey’s blood pressure decreased and an hour later both the heart and respiration 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 an artery in the direction of the heart and started artificial respiration. After two minutes the baboon’s heart became active once more. After fifteen minutes, spontaneous respiration 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 (注射器) and ran with it around the room. Her behavior differed little from that of a healthy animal. [br] One possible benefit of the experiment discussed in the passage is______.
选项 A、less crowded cities
B、victory over death
C、protection against fatal injury
D、fewer deaths from heart attacks
答案 D
解析 这是一道推断题。此题不能只局限在理解文章表层含义，应把握住文章的中心思想和每段内容，明确作者的观点与写作该文的目的，然后结合自己的经验与知识进行较深入的逻辑推断，挖出作者的弦外之音，从而得出正确的结论。此篇文章对两种死亡进行了区分和分析，并在最后一段中介绍了对狒狒“Keta”进行的心脏实验。这次实验的成功表明了通过冷冻机体的关键组织(如心脏等)来延缓临床死亡是可能的，这也就意味着今后死于心脏病的人数会越来越少。故D正确。
转载请注明原文地址:https://tihaiku.com/zcyy/4007010.html
相关试题推荐
随机试题
最新回复(0)