Scientists have been seeking a way to prolong the period of clinical death so sleep. By slowing down the bodys 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 an its body. The monkeys 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 monkeys 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.
26. This passage focuses on_______.
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
27. The best statement of the main idea of this passage is that
A. modem scientists divide the process of dying into clinical and biological death
B. biological death occurs when vital organs have suffered permanent damage
C. scientists have found a way to prolong the period of clinical death
D. cooling delays the processes leading to biological death
28. One characteristic of clinical death is______.
A. lasting damage to the lungs B. destruction of the tissues
C. temporary non-functioning of the heartD. that the organism cannot be revived
29. According to the passage, cooling an organism
A. speeds up the bodys metabolism B. slows disintegration of body tissues
C. prevents damage to organs D. revives damaged organs
30. One possible benefit of the experiment discussed in the passage is______.
A. less crowded cities B. victory over death
C. protection against fatal injury D. fewer deaths from heart attacks
26. C 27. C 28. C 29. B 30. D
跟我背CET4核心词汇:continuous
跟我背CET4核心词汇:coach
跟我背CET4核心词汇:range
跟我背CET4核心词汇:adhere
跟我背CET4核心词汇:internal
跟我背CET4核心词汇:racial
跟我背CET4核心词汇:code
玩游戏记英语四级单词:Revenge报仇
跟我背CET4核心词汇:adult
跟我背CET4核心词汇:valid
跟我背CET4核心词汇:continual
跟我背CET4核心词汇:explode
跟我背CET4核心词汇:offend
跟我背CET4核心词汇:poverty
玩游戏记英语四级单词:Fatal Fury饿狼传说
跟我背CET4核心词汇:wonder
跟我背CET4核心词汇:grand
跟我背CET4核心词汇:hollow
跟我背CET4核心词汇:acid
跟我背CET4核心词汇:precaution
跟我背CET4核心词汇:idle
跟我背CET4核心词汇:videotape
跟我背CET4核心词汇:isolate
跟我背CET4核心词汇:impose
跟我背CET4核心词汇:video
跟我背CET4核心词汇:beforehand
跟我背CET4核心词汇118optimistic
跟我背CET4核心词汇:consistent
跟我背CET4核心词汇:valley
跟我背CET4核心词汇:ban
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