Death is natural, but do you have any idea of the process of dying? 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(复活). Biological death occurs when changes in the organism lead to the “breaking up” of vital cells and tissues. Death is then unchangeable and final.
Scientists have been seeking a way to prolong the period of clinical death so that the organism can remain alive 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(新陈代谢), 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 scientist 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 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 an artery in the direction of the heart and started artificial breathing. After two minutes Keta’s heart became active once more. After fifteen minutes, spontaneous(自发的)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.
1.For a person who suffers from the clinical death, _________.
A. his most important organs are damaged.
B. he still has the possibility of getting back to life.
C. he cannot avoid final death.
D. he is still very much alive
2.Scientists try to make the time of clinical death longer in order to __________.
A. slow down the body’s metabolism.
B. bring vital cells and tissues back to active life.
C. cool the organism.
D. delay the coming of biological death.
3.How did the scientists put Keta into clinical death?
A. By putting her to sleep, lowering her temperature and draining her blood.
B. By surrounding her body with ice-bags and draining her blood.
C. By lowing her blood pressure and stopping her heart from beating.
D. By draining her blood, lowering her blood pressure and stopping her breathing.
4.All of the following indicate that the monkey has almost restored to her original physical state except the fact that__________.
A. her heart beat again.
B. she regained her normal breath.
C. she rejected a penicillin injection.
D. she acted as lively as a healthy monkey.
阅读下列短文，从每题所给的四个选项（A,B,C,D）中，选出最佳选项，并在答题卡上将该项涂上.
When Charles Stratton was five, he stopped growing. His mother took him to see the famous showman, P. T. Barnum. Mr. Barnum thought a small person would be the perfect addition to his show. He hired Charles' parents along with him, and they traveled the world together.
He gave the two-foot-tall Charles a name, General Tom Thumb. He taught Tom how to sing, dance, act and tell jokes. When he felt Tom was ready to perform on stage, he made up ads. To stir up great interest, he said that Tom was eleven years old and had come from England.
During the show, Tom fought battles pretendedly with tall people. He also danced upon a wooden plate held by a person who was eight feet tall. Tom's act was very popular and brought in a lot of money. By the time Tom was an adult, he had grown very rich. He had become a billionaire at the age of twenty five.
Fortunately for Tom, Mr. Barnum added more little people to his show, and Tom became lucky in love as well. One of the little people was Lavinia Warren, a schoolteacher. Tom was able to win her love, and they married.
The ceremony and reception were the talk of the town. They were attended by many rich and famous people and by about 2000 guests. Crowds filled the streets of New York to have a look at their tiny wedding marriage. The couple even met with President Abraham Lincoln on their honeymoon just before going to live in Tom's house in Connecticut.
Their wedding, which took place during the Civil War, provided a welcome escape from the sad problems of war. Not willing to let this bit of sunshine fade, communities throughout the country sponsored "Tom Thumb" weddings. In these weddings, small boys and girls, all dressed up, went through marriage ceremony for fun.
1.The underlined words "talk of the town" means________.
A. it was in the newspaper
B. it was the most popular topic
C. people spread bad rumors about it
D. it was discussed in a city meeting
2.Which one of the following statements is true according to the text?
A. Charles mother took him to see the famous showman because he stopped growing.
B. Tom had to fight with others during the show.
C. Tom’s wedding ceremony helped people cheer up in a dark time.
D. Tom and his mother came from England.
3.What is the main idea of the last paragraph?
A. Weddings always make people feel full of sunshine.
B. People are always disappointed during war time.
C. Entertainment can serve an important purpose.
D. People should be married when they are small children.
---Did you remember to take the key to Tom?
---Yes, I gave it to him ________ I saw him.
A. while B. once C. suddenly D. the first time
It is ________ world of wonders, ________ world where anything can happen.
A. a; a B. a; the C. the; the D. the; a
Father ________ for London on business upon my arrival, so I didn’t see him.
A. has left B. left C. had left D. was leaving
The boy’s dream was to have his own laboratory ________ to try out some of his own ideas.
A. from which B. in which
C. by which D. at which
