D Plastic is one of the most important technological discoveries of the 20th century. However, it may soon be replaced. The new development- liquid wood- can replace plastics in all branches of modern 题目和参考答案——青夏教育精英家教网—

题目内容

Plastic is one of the most important technological discoveries of the 20th century. However, it may soon be replaced. The new development- liquid wood- can replace plastics in all branches of modern-day industries.

Plastic as a material enjoys the biggest demand in the modern world, but it does have a number of drawbacks. First and foremost, plastic isn’t recyclable. Secondly, it contains toxins (毒物) helping develop cancerous diseases. Finally, it’s made of oil and oil reserves aren’t endless.

The liquid wood technology is likely to replace plastic and providing mankind with new materials for many years ahead. Norbert Eisenfreich, a senior researcher at the Faunhofer Institute for Chemical Technology in Germany (ICT), said that arboform, the new material, is made of lignin(木素质）, which can be obtained from soft tissues of wood. Once mixed with several other matenals, it turns into solid and non-toxic alternative for plastics.

ICT team leader Emilia Regina Inone-Kauffmann said the wood-working industry separates wood into three basic components, including lignin. Lignin isn’t used for the production of paper. Specialists of ICT mixed lignin with several natural materials and thus invented the material which could be melted and molded (铸型）.

When solid, arboform looks like plastic and possesses tho qualitie of polished wood. It can be used for the production of any items. Arboform is already used for the production of car parts which require extra strength. In addition, liquid wood can be recycled repeatedly. The material preserved all of its qualities even if it’s reprocessed ten times.

However, the new invention doesn’t enjoy an extensive use due to the high content of sulfur(硫) in it. German researchers are sure to reduce the amount of sulfur by 90% very soon to make arboform usable for home needs.

71. According to the passage, plastic_______.

A. helps us to reduce the use of petrol

B. helps to protect our environment in some way

71-75 CCDBA

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相关题目

--- Excuse me. Can I borrow your ______ pencil-box?

--- Certainly, here it is.

A. blue cheap plastic

B. plastic blue cheap

C. cheap blue plastic

D. plastic cheap blue

Have you ever stayed in a hotel? Most Chinese hotels often provide guests with things like disposable (一次性的) toothbrushes, toothpaste, shampoo and slippers. Many guests like the idea because they don't have to bring their own. But, if you travel to Beijing, remember to bring your own things. Starting from June, some hotels in Beijing will no longer provide guests with these disposables. They want to ask people to use less disposable things.

Many disposable things are made of plastic. People throw them away after only using them once. It is a waste of natural resources and is very bad for the environment. Do you know, one Chinese person makes as much as 400kg of waste a year! Most of that waste comes from disposable things. In Beijing, people throw away about 19,000 tons of plastic bags and 1,320 tons of plastic lunch bowls every year! Plastic can take between 100 and 400 years to break down. So the less plastic we throw out, the better. So, wherever you travel, bring your own things and use them again and again.

Back at home and school, you can also do something to make our world a better place. Try to do these things in your daily life: Use cloth shopping bags, not plastic ones. After using a plastic bag, wash it out and let it dry. Then you can use it over and over again. Do not use paper cups. At your school canteen（食堂）, use your own bowl and chopsticks instead of disposable ones.

Some Beijing hotels will no longer provide guests with ____.

A. cheap food and drink B. disposable things

C. good service D. free TV programmes

Which of the following is NOT true?

A. Many disposable things are made of plastic.

B. Throwing disposable things away is a waste of natural resources.

C. Plastic is very bad for the environment.

D. Plastic breaks down easily.

What can we do to make our world a better place at home and school?

A. Use shopping bags made of plastic. B. Do not throw away paper cups.

C. Use disposable plates, bowls and chopsticks.

D. Do not forget to reuse daily necessities.

We can tell from the story that ____.

A. people don't like disposable things at all

B. we can't use paper or plastic bowls at school

C. we should use less plastic things and protect our environment

D. hotels won't provide disposable things because they want to save money

On a Friday 11 , a poor young artist stood at the gate of the subway station, playing his violin. The music was 12 , and many people 13 and put some money into the 14 of the young man.

The next night, the young artist took out a large piece of 15 and laid it on the ground. Then he began 16 . The music sounded more pleasant. Some people gathered and they found the 17 on that paper. “Last night ,a gentleman put a(n) 18 thing into my hat. Please come to get it back.” When the people saw that, they felt very curious and began to 19 what it could be. After about half an hour, a man 20 there in a hurry and said ,“It can’t be true！You ...you ...”

The young violinist asked, “Did you 21 something?”

“Lottery (彩票).”the man answered 22 .

The violinist took out a lottery ticket. “Is it？”he asked.

The man was too 23 to say a word ...George Sang 24 a lottery ticket a few days ago. The awards(奖)opened yesterday and he won $500,000. So lucky and excited did he feel that he 25 50 dollars and put it in the hat when hearing the music. However, the lottery ticket was also thrown into the hat without being noticed. The violinist found the lottery ticket. Thinking that the owner would 26 to look for it, he came back to where he was given the lottery ticket.

Someone asked the violinist 27 he returned the lottery ticket to the man. He said, “ 28 I don’t have much 29 , I live happily; but if I lose 30 I won’t be happy forever.”

1.A. morning B. night C. afternoon D. noon

2.A. quiet B. exciting C. beautiful D. familiar

3.A. passed by B. went away C. slowed down D. speeded up

4.A. wallet B. box C. bag D. hat

5.A. paper B. cloth C. glass D. plastic

6.A. singing B. playing C. working D. waiting

7.A. poems B. articles C. words D. texts

8.A. important B. fantastic C. dangerous D. interesting

9.A. argue B. care C. expect D. guess

10.A. came B. rushed C. walked D. left

11.A. get B. find C. forget D. lose

12.A. quickly B. anxiously C. seriously D. carefully

13.A. confused B. anxiously C. excited D. surprised

14.A. bought B. made C. found D. sold

15.A. handed out B. took out C. hunted for D. picked up

16.A. forget B. remember C. return D. picked up

17.A. where B. why C. when D. how

18.A. Because B. Although C. If D. While

19.A. money B. food C. time D. luck

20.A. friendship B. honesty C. hope D. love

Since its invention 100 years ago, plastic , the superstar of the technological age, has become ugly and ungreen . But that’s about to change. An exhibition at London’s Science Museum this week could put it back on the cutting edge of science.

Have you ever hesitated in donating blood? The invention of “plastic blood” might make you feel better.

British scientists are working on the artificial blood as a replacement for real blood in emergency situations. It is made of plastic molecules(分子 ) and can join oxygen and transport it around the body. As a red, honey-like glue , plastic blood can be carried around conveniently . You just add water to make as much blood as you need.

The cells of our body are strict about what molecules the let in and out . For example , if we inject protein or DNA directly into the body, our immune ( 免疫 ) SYSTEM WILL DESTROY IT BEFORE IT REACHES THE CELLS.

To get around this , a British scientist has created drug-carrying plastic balls that fool the body into thinking they are natural. Once inside the cell, their contents are spread out through a small controlled explosion.

Skin transplants are widely done these days. But removing a piece of skin from, say , the bottom to plant it on the face can hurt and be troublesome.

The British company, Celltran, is working on plastic skin. Using plastic, they plan to take a small piece of the patient’s skin and grow it into an extra lay of skin on top of the plastic. a

The plastic feels similar to skin, so skin cells like to grow on it. The plastic then gradually disappears, without any reaction or infection .

1. What would be the best title for the text?

A. The superstar of technological age

B. An exhibition at London’s Science Museum

C. No more “white pollution”

D. Plastic takes on a new life

2. Which of the following will be on display at the exhibition at London’s Science Museum?

A. Plastic cells B. Plastic skin

C. Plastic molecules D. Plastic transplants

3. The phrase “get around “ in Paragraph 5 means closest to ______.

A. overcome B. end C. ensure D. pass

4.Which of the following is true according to the text?

A. Plastic blood will be injected into the body in drug-carrying plastic balls

B.The plastic skin will remain a part of the new skin

C. Plastic blood will take the place of real blood

D. Plastic blood contains a lot of water

第三部分：阅读理解 (共20小题；每小题2分，满分40分)

请认真阅读下列短文，从短文后各题所给的A、B、C、D四个选项中，选山最佳选项，并在答题纸上将该项涂黑。

Many disposable things are made of plastic. People throw them away after only using them once. It is a waste of natural resources (资源) and is very bad for the environment. Do you know, one Chinese person makes as much as 400kg of waste a year! Most of that waste comes from disposable things. In Beijing, people throw away about 19,000 tons of plastic bags and 1,320 tons of plastic lunch bowls every year! Plastic can take between 100 and 400 years to break down. So the less plastic we throw out, the better. So, wherever you travel, bring your own things and use them again and again.

1. Why do many hotels provide guests with some disposable things?

A. Let their guests be convenient during their travelling.

B. Hope their guests use less disposable things.

C. Wish their guests to save money.

D. Want their guests to use more disposable things.

2. Some Beijing hotels will no longer provide guests with ____.

A. cheap food and drink B. disposable things

C. good service D. free TV programmes

3. Which of the following is NOT true?

A. Many disposable things are made of plastic.

B. Throwing disposable things away is a waste of natural resources.

C. Plastic is very bad for the environment.

D. Plastic breaks down easily.

4. What can we do to make our world a better place at home and school?

A. Use shopping bags made of plastic.

B. Do not throw away paper cups.

C. Use disposable plates, bowls and chopsticks.

D. Do not forget to reuse daily necessities（日用品）.

5. We can tell from the story that ____.

A. people don't like disposable things at all

B. we can't use paper or plastic bowls at school

C. we should use less plastic things and protect our environment

D. hotels won't provide disposable things because they want to save money

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