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(復(fù)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(新陳代謝), 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(自發(fā)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.

練習冊系列答案
相關(guān)習題

科目：高中英語 來源：2016屆黑龍江哈爾濱第六中學(xué)高三第二次月考英語試卷（解析版） 題型：單項填空

-_____ you read the story?

-Yes. I _____ it at school.

A. Have; read B. Did; read

C. Have; have read D. Did; have read

查看答案和解析>>

科目：高中英語 來源：2015年湖南省懷化市高三模擬考試英語試卷（解析版） 題型：單項填空

_____ in charge of two classes made Mrs．Li, head of Senior Grade 3, extremely tired．

A． Leaving B． Left

C． Being left D． Having left

查看答案和解析>>

科目：高中英語 來源：2014-2015學(xué)年安徽省六校教育研究會高三第一次聯(lián)考英語試卷（解析版） 題型：閱讀理解

More than one-third of adults in the United States are obese(肥胖)．In fact，over obesity has reached such proportions that one big-city mayor has gone about banning large-sized，sugary soft drinks and the First Lady has been on a campaign to control the dietary offerings in public schools．

Even many adults who do not fit the clinic definition of obesity are still overweight，and a large percentage are looking for the best ways to lose weight．

Reducing pounds largely comes down to the two-sided factors of diet and exercise．Not carrying out the first one enough，and not getting enough of the second one，ends up giving the individual a recipe for being overweight．

Advising someone to eat less and exercise more might be the easiest advice possible，but it’s also，partially，an oversimplification．Dieting has more to do with the types of food you eat than how much you eat．Reduce the amount of red meat in your diet．If you don’t want to eliminate red meat altogether，choose cuts of meat with less fat content．Limit your intake of salt and starches．If you’ve got to have potato chips alongside your sandwich at lunch，choose the baked potato chips that contain less fat than the deep-fried chips．You might find you’re really not sacrificing that much in terms of taste．

A diet rich in fruits，vegetables，egg whites，fish and nonfat dairy products will certainly aid in the mission of losing weight．Drink more water and less sugary drinks．If you have to have a soda，a diet soda is a better option，but seltzer is an even better choice than that．

It’s important—if not always easy—to make sure you get at least some physical activity each and every day．If your feet won’t allow for a regular jogging regimen，then make sure you take lots of walks．Next time you need to mail a letter，walk to the mailbox instead of driving．Try to work in a daily walk in your neighborhood．

1.You should________when you want to lose weight

A． try not to fit the clinic definition of obesity

B． diet as well as exercise enough

C． get little exercise every day

D． focus your attention on diet only

2.The First Lady has started a movement to________．

A． raise people’s awareness of healthy diet

B． control the public school dietary supplying

C． ban the sugary soft drinks

D． realize the importance of dieting

3.What can we learn from the fourth paragraph？

A． We must keep far away from fat and ignore our taste．

B． The simplest and best way to lose weight is to eat and exercise more．

C． We should remove the red meat in our diet completely to reduce weight．

D． When it comes to diet，no one needs to starve themselves in order to lose weight．

4.The last paragraph is mainly about________．

A． walk B． diet

C． exercise D． jog

查看答案和解析>>

科目：高中英語 來源：2015-2016學(xué)年吉林松原油田高中高二上學(xué)期期末英語試卷（解析版） 題型：閱讀理解

閱讀下列短文，從每題所給的四個選項中（A、B、C和D），選出最佳選項，并在答題卡上將該項涂黑。

"Tear'em apart ! ""Kill the fool! Murder the referee（裁判）！”

These are common remarks one may hear at various sporting events．At the time they are made, they may seem innocent enough．But let's not kid ourselves．They have been known to influence behavior in such a way as to lead to real bloodshed． Volumes have been written about the way words affect us．It has been shown that words having certain connotation(涵義)may cause us to react in ways quite foreign to what we consider to be our usual humanistic behavior．I see the term “opponent” as one of those words．Perhaps the time has come to delete（刪除） it from sports terrors．

The dictionary meaning of the term "opponent" is "enemy"; "one who opposes your interests．" Thus, when a player meets an opponent, he or she may tend to treat that opponent as an enemy．At such times, winning may be the most important, and every action, no matter how rude, may be considered acceptable．I remember an incident in a handball game when a referee refused a player's request for a time out for a glove change because he did not consider them wet enough．The player started to rub his gloves across his wet T-shirt and then shouted, "Are they wet enough now?"

In the heat of battle players have been observed to throw themselves across the court without considering the consequences(后果) that such a move might have on anyone in their way．I have also seen a player reacting to his opponent's intentional and illegal blocking by deliberately(故意地) hitting him with the ball as hard as he could during the play．Off the court, they are good friends．Does that make any sense? It certainly gives proof of a court attitude which goes against normal behavior．

Therefore, I believe it is time we elevated(提升)the game to the level where it belongs, thereby setting an example to the rest of the sporting worlD． Replacing the term "opponent" with "associate" could be an ideal way to start．

The dictionary meaning of the term "associate" is" colleague", "friend", "companion"．Think about it! You may soon see and possibly feel the difference in your reaction to the term "associate" rather than "opponent"．

1.Which of the following statements best expresses the author's view?

A． Aggressive behavior in sports can have serious consequences．

B． The words people use can influence their behavior．

C． Unpleasant words in Sports are often used by foreign athletes．

D． Unfair judgments by referees will lead to violence on the sports field．

2.Harsh words are spoken during games because the players _______．

A． are too eager to win

B． are usually short-tempered and easily offended

C． cannot afford to be polite in fierce competition

D． treat their rivals(對手) as enemies

3.What did the handball player do when he was not allowed a time out to change his gloves?

A． He refused to continue the game．

B． He angrily hit the referee with a ball．

C． He claimed that the referee was unfair．

D． He wet his gloves by rubbing them across his T-shirt．

4.The author hopes to have the current situation in sports improved by _______．

A． calling on players to use clean language on the court

B． raising the referee's sense of responsibility

C． changing the attitude of players on the sports field

D． regulating the relationship between players and referees

查看答案和解析>>

科目：高中英語 來源：2016年甘肅省協(xié)作體高三上學(xué)期期末考試英語試卷（解析版） 題型：書面表達

根據(jù)下面的圖片寫一篇文章。

內(nèi)容必須包括：

（1）介紹漫畫內(nèi)容；

（2）解釋考證熱盛行的原因，為什么許多大學(xué)生參加各種各樣的證書考試；

（3）適當表露自己的看法。

注意：

1．詞數(shù)：120字左右；

2．參考詞匯：Certificate Mania（考證熱）；Various（各種各樣的）

Certificate Mania

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

__________________________________________________________________

查看答案和解析>>

科目：高中英語 來源：2016年北京市海淀區(qū)高三上學(xué)期期末考試英語試卷（解析版） 題型：單項填空

______ my father doesn’t say a lot in daily life， he gives me much love and affection．

A． Because B． When

C． Although D． If

查看答案和解析>>

科目：高中英語 來源：2015-2016學(xué)年四川營山縣回龍中學(xué)高二12月檢測英語試卷（解析版） 題型：單項填空

Suddenly it hit me__________ difficult it was for my mother to get a master’s degree in China in the 1960s.

A. what B. how C. which D. whether

查看答案和解析>>

科目：高中英語 來源：2016屆山東德州高三上學(xué)期期中考試英語試卷（解析版） 題型：短文改錯

I grew up in Westley，California．After graduating with high school．I went to Beijing and started teaching in a kindergarten．I had never been to a city big as Beijing before．I fall in love with Chinese food．I would eat out at the different restaurant every night and practice my Chinese with local citizen．I suppose the air was clean back home，but my life in China was much more interesting．My most favorite part about living in Beijing was nothing that many other foreigners didn’t like at all—the noise．I loved walking outside my door and hear the sounds of city life．Therefore，I’m back in Westley now，and all I hear is silence．I definitely miss Beijing．

查看答案和解析>>

同步練習冊答案