Nothing lives forever. Is that right ?Wrong. It seems hard to believe that there are some animals that do not die. They are very simple creatures , too small to be seen without the help of a microscop 题目和参考答案——青夏教育精英家教网—

题目内容

Nothing lives forever. Is that right ?Wrong. It seems hard to believe that there are some animals that do not die. They are very simple creatures , too small to be seen without the help of a microscope. While most animals, including human beings, have billions of cells in their bodies , these little death defiers have only one. Each cell lives for a certain length of time, and then it splits to form two new animals. The adult animal turn itself into two babies .All of the new cells finally divide, but none die unless they are killed by accident or disease.

There are other cells that avoid being old. Cells from old mice have been moved into young mice over and over again, each time the body they are in wears out . In their new bodies the old cells seem to begin life over again. They divide and grow just like young cells.

Is there any way to discover the secret of these cells’ youth and apply it to human being? Not yet. But scientists are still searching, and they may be closer than ever to finding an answer. Of course , some ways to increase our chance of living longer. Like good food and exercise, have been known for years. Progress against killer disease has already raised the human life to more than seventy years, compared with less than fifty years a century ago. Now scientists are studying other ways to fight against death. They will never give up their efforts until they win their final success.

68. What is the passage mainly about ?

A. The law governing the growth of all creatures

B. The secret of getting old

C. Ways to begin life over again

D. Certain cells that never die

69. What does the phrase“death defiers”refer to ?

A. Animals that fear nothing B. Cells that can’t be understood

C. Animals that don’t die D. Cells that finally die in a normal way

70. Scientists are interested in these one-cell animals because they want to .

A. find out how these tiny animals fight against diseases

B. discover the relations between human bodies and these animals

C. learn how these cells can split into new cells

D. look for ways of keeping human life much longer

71. What is the writer’s attitude towards the possibility for human beings to live longer?

A. Confident B. Doubtful C. Uncertain D. Respectful

D C D A

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相关题目

根据对话情景和内容，从对话后所给的选项中选出能填入每一空白处的最佳选项，并在答题

卡上将该选项涂黑。选项中有两项为多余选项。

Operator: Hello, Emergency Line．_______

Li Dong: Yes．I am calling to report you an accident．

Operator: ___________

Li Dong: A truck hit a car on highway 320．

Operator: Has anyone been badly hurt?

Li Dong: __________ The driver of the truck says he is OK．But the woman must have had her leg broken．

Operator: ________

Li Dong : Li Dong．

Operator: OK．Mr．Li．We will immediately send an ambulance and a police car．It is 11:55 now, and they should be there by 12:00．__________

Li Dong : That is nothing．

A．Thanks very much．

B．What can I do for you?

C．You are so great．

D．Would you please give me some details, sir?

E．I am not quite sure．

F．May I have your name, sir?

G．What happened?

阅读下面短文，然后按照要求写一篇150词左右的英语短文。

I will never forget the lesson which Mr. Li gave us. One day Mr. Li was speaking to us in our school meeting room. He began his speech by holding up a ?? 100 bill. He asked, "Who would like this ?? 100 bill?" Most of us put up our hands quickly. Then he said, "I am going to give this ?? 100 to one of you, but first let me do this." He then made the bill into a ball and said; "Who wants it now?" We raised our hands again. But he said,“Wait a moment.”He then dropped it on the floor and stepped on it. After that, he picked up the dirty bill and said, "Who still wants it?" Many hands were still up.

"My friends," he said, "you have learned a valuable lesson today. No matter what I did to the money, you still wanted it because it did not go down in value. It was still worth ?? 100."

"We sometimes lose confidence in ourselves." He went on speaking, "We feel as if we are worth nothing. But remember, no matter what has happened to you, you will never lose your value: you are always valuable to those people who love you. Your value doesn't come from what you do or who you know, but WHO YOU ARE."

"You are special and valuable. Don't ever forget it!'

[写作内容)

1．以约30个词概括上文的内容；

2．以约120个词谈谈你的感想，并包括以下内容：

(1) 通过阅读这篇短文，你有哪些收获?

(2) 如果一个学生某次考试成绩很差，你想跟他／她说些什么?

[写作要求]

你可以使用实例或其他论述方法支持你的论点，也可以参照阅读材料的内容，但不得直接引用阅读材料中的句子。

One of my China Dialogue colleagues in Beijing recently bought a Philips energy-saving light bulb to replace a standard one．He was happy with his choice．It may have cost 30 yuan （just under US$4．50） - ten times the price of a filament （灯丝） bulb - but he wanted to save energy as part of his low-carbon lifestyle．And according to the shopkeeper, he would save, in the long run, much more than the 30 yuan he was spending．

Yet only one month later, his expensive light bulb blew up, before he had saved even a small part of the purchase price．Will he stick to his high-cost, low-carbon lifestyle?

China's environmental organizations have started to advocate low-carbon lifestyles and the decrease of carbon footprints to help fight against climate change．But they have overlooked one fact: in China, low-carbon living comes at a high cost．It means buying energy-saving bulbs and appliances, and environmentally friendly building materials and daily goods．Cost can no longer be the only standard for purchases．An energy-saving and environmentally friendly product is more expensive than a standard alternative - whether it's a simple light bulb or the house it shines．For average consumers, even buying an ordinary bulb is a huge burden．How can we persuade ordinary people to choose an energy-saving residence? This is not a trend they can afford to follow; perhaps this fashion is only for the rich．

Most consumers today do not cause huge carbon dioxide （CO₂） emissions．Their responsibility lies not in choosing a low-carbon lifestyle today, but in avoiding a high-carbon life in the future．The principle of "common but differentiated responsibility" - a basis of sustainable development - can be applied here as well．

In China, low-carbon living still is resisted by a lack of social infrastructure（基础设施）. Even if your salary allows you to make that choice, nobody is there to help you accomplish it．

Consider energy-saving homes. You need to find out whether or not the developer has used natural materials wherever possible; how effective the insulation（绝缘物、隔热物） is; and what the green credentials of installed equipment are．You can read up a little, but you'll still be lucky to avoid being puzzled by the developers' marketing．Many so-called energy-saving buildings are nothing of the sort, and some are even more energy-hungry than the average home - as Li Taige warned in his article "Energy-efficient buildings? Not always", on China Dialogue last August．

1. What may probably be the best title of this passage?

A. To purchase a cheap bulb - your wise alternative．

B. To choose an energy-saving residence - a must of your life

C. To learn a low-carbon lifestyle - each citizen's responsibility

D. To learn a low-carbon lifestyle - a promising but difficult purpose

2.Why does the writer say this fashion is only for the rich in the fourth paragraph?

A. Because the cost is a very important standard for purchases.

B. Because buying an ordinary bulb is very expensive.

C. Because energy-saving products are more expensive than the common alternatives.

D. Because rich people like to follow this trend.

3. What does the writer think of energy-saving homes?

A. Most of them are environmentally friendly.

B. They are musts of low-carbon lifestyle of Chinese.

C. They are huge burdens for Chinese people.

D. Many of them are more in name than in reality.

4.We can infer from the passage that ____．

A. Using energy-saving bulbs and appliances is a fashion．

B. It's easy for most Chinese to try to learn a low-carbon lifestyle．

C. All citizens in China don’t have the same responsibility in living a low-carbon lifestyle．

D. Most Chinese families cannot afford to purchase an energy-saving residence.

5.What is the writer's attitude towards the low-carbon lifestyle?

A. informative and entertaining B. supportive but cautious

C. negative but wise D. positive and active

句型转换（每空1分，满分15分）

1.The new medicine proved beneficial to the patient's skin problems.

----The new medicine proved to _____ _____ _____to the patient's skin problems.

2.I have neither brothers nor sisters.That is to say, I'm an only child.

--- I have neither brothers nor sisters—_____ _____ _____, I'm an only child

3.As a matter of fact, my boss is three years younger than me.

--As a matter of fact, my boss is three years _____ _____ me.

4.All we could see in front of us was 200 km of nothing but sand.

-- All we could see _____ _____ us was 200 km of nothing but sand.

5.Li Ming has his faults, but, on the whole, he is a good helper

--Li Ming has his faults, but, _____ _____ _____, he is a good helper.

6.It is difficult to imagine that he accepted the decision without any hesitation.

---It is hard to imagine _____ _____ the decision without any hesitation.