Broken rubber bands and flat tires requiring replacement could soon be a thing of the past.
French researchers have developed a new kind of rubber that can repair itself when broken.The new rubber is made from widely available materials including vegetable oil and a common industrial chemical.All the materials are considered safe to the environment and can be easily reused.
The best part is that the new rubber can be repaired and used again and again without losing its strength or ability or stretch.When cut, the rubber can be made new again, simply by pressing the two broken ends back together.
The product can be repaired at room temperature, around twenty degrees Centigrade;other self-healing materials require higher temperatures for repair.
Traditionally, rubber substances are made from huge molecules(分子)connected by strong chemical links, or bonds.The new rubber is made of smaller molecules.The molecules are linked together using hydrogen bonds.When connected in this way, the molecules act like one long molecule, forming what is called supramolecular networks(超分子网).When the rubber is cut, the molecules attempt to connect with whatever molecule is near them.When pressed together, the molecules are able to repair themselves at the molecular level, making the repaired rubber like new.
However, time is an important element in the process.If the broken ends are not brought together quickly, a repair is not possible.This is because molecules will form bonds with molecules on their own side.The inventors say the surfaces of the rubber can be repaired within a week of being separated.
The rubber is the creation of scientists at the Industrial Physics and Chemistry Higher Education Institution in Paris.The organization is part of France's National Center for Scientific Research.The new material is described in greater detail in the research publication Nature.
1.According to the introduction, which of the following is NOT the advantage of the new rubber?
A.It can be made as easily as common rubber.
B.It is environmentally-friendly.
C.It can repair itself at room temperature.
D.It is made of smaller molecules.
2.What does the 5th paragraph mainly tell us?
A.Why the new rubber is unique.
B.Why the new rubber can repair itself.
C.The new rubber is made from huge molecules.
D.The new rubber is different from the common rubber.
3.If we want to know more about the technology of this kind of new rubber, where can we get the information?
A.In the researchers' diary. B.In a guide book.
C.In a research magazine. D.In a newspaper.
高三英语阅读理解中等难度题
Broken rubber bands and flat tires requiring replacement could soon be a thing of the past.
French researchers have developed a new kind of rubber that can repair itself when broken.The new rubber is made from widely available materials including vegetable oil and a common industrial chemical.All the materials are considered safe to the environment and can be easily reused.
The best part is that the new rubber can be repaired and used again and again without losing its strength or ability or stretch.When cut, the rubber can be made new again, simply by pressing the two broken ends back together.
The product can be repaired at room temperature, around twenty degrees Centigrade;other self-healing materials require higher temperatures for repair.
Traditionally, rubber substances are made from huge molecules(分子)connected by strong chemical links, or bonds.The new rubber is made of smaller molecules.The molecules are linked together using hydrogen bonds.When connected in this way, the molecules act like one long molecule, forming what is called supramolecular networks(超分子网).When the rubber is cut, the molecules attempt to connect with whatever molecule is near them.When pressed together, the molecules are able to repair themselves at the molecular level, making the repaired rubber like new.
However, time is an important element in the process.If the broken ends are not brought together quickly, a repair is not possible.This is because molecules will form bonds with molecules on their own side.The inventors say the surfaces of the rubber can be repaired within a week of being separated.
The rubber is the creation of scientists at the Industrial Physics and Chemistry Higher Education Institution in Paris.The organization is part of France's National Center for Scientific Research.The new material is described in greater detail in the research publication Nature.
1.According to the introduction, which of the following is NOT the advantage of the new rubber?
A.It can be made as easily as common rubber.
B.It is environmentally-friendly.
C.It can repair itself at room temperature.
D.It is made of smaller molecules.
2.What does the 5th paragraph mainly tell us?
A.Why the new rubber is unique.
B.Why the new rubber can repair itself.
C.The new rubber is made from huge molecules.
D.The new rubber is different from the common rubber.
3.If we want to know more about the technology of this kind of new rubber, where can we get the information?
A.In the researchers' diary. B.In a guide book.
C.In a research magazine. D.In a newspaper.
高三英语阅读理解中等难度题查看答案及解析
Broken rubber bands and flat tires requiring replacement could soon be a thing of the past.
French researchers have developed a new kind of rubber that can repair itself when broken.The new rubber is made from widely available materials including vegetable oil and a common industrial chemical.All the materials are considered safe to the environment and can be easily reused.
The best part is that the new rubber can be repaired and used again and again without losing its strength or ability or stretch.When cut, the rubber can be made new again, simply by pressing the two broken ends back together.
The product can be repaired at room temperature, around twenty degrees Centigrade;other self-healing materials require higher temperatures for repair.
Traditionally, rubber substances are made from huge molecules(分子)connected by strong chemical links, or bonds.The new rubber is made of smaller molecules.The molecules are linked together using hydrogen bonds.When connected in this way, the molecules act like one long molecule, forming what is called supramolecular networks(超分子网).When the rubber is cut, the molecules attempt to connect with whatever molecule is near them.When pressed together, the molecules are able to repair themselves at the molecular level, making the repaired rubber like new.
However, time is an important element in the process.If the broken ends are not brought together quickly, a repair is not possible.This is because molecules will form bonds with molecules on their own side.The inventors say the surfaces of the rubber can be repaired within a week of being separated.
The rubber is the creation of scientists at the Industrial Physics and Chemistry Higher Education Institution in Paris.The organization is part of France's National Center for Scientific Research.The new material is described in greater detail in the research publication Nature.
1.According to the introduction, which of the following is NOT the advantage of the new rubber?
A.It can be made as easily as common rubber.
B.It is environmentally-friendly.
C.It can repair itself at room temperature.
D.It is made of smaller molecules.
2.What does the 5th paragraph mainly tell us?
A.Why the new rubber is unique.
B.Why the new rubber can repair itself.
C.The new rubber is made from huge molecules.
D.The new rubber is different from the common rubber.
3.If we want to know more about the technology of this kind of new rubber, where can we get the information?
A.In the researchers' diary. B.In a guide book.
C.In a research magazine. D.In a newspaper.
高三英语阅读理解中等难度题查看答案及解析
— Have you heard of that?Tom recently bought a new car and an expensive flat.
— ________? He even couldn’t have enough money to pay for the rent.
A.How about | B.Why not | C.How come | D.So what |
高三英语单项填空中等难度题查看答案及解析
My tire was flat. And I was on a country road. When I with the tire, a car pulled off the road behind me. I saw a male and said, “Hey, do you need any help?”
I literally was . This young guy was dressed in black. Nearly everything imaginable was tattooed(纹身). When he asked to give me a , I someone sitting in his car. That me. Thoughts of robberies flashed through my mind.
Then, it began to . It hit like a waterfall and made it to finish the tire change. With the car jacked(千斤顶托起) up, I was to get in my car. “Get in my car” he insisted, “We’ll wait with you until the rain stops.” “No. I don’t need your help.” I said. “Come on. Get in.” he said as he my arm and pulled me toward his car. “Oh, God, protect me!” I to myself.
As I settled into the back seat, suddenly a delicate came from the front seat of the car. “Are you all right?” “Yes, I am,” I replied with much seeing an old woman there. “My name is Beatrice and this is my neighbor John. John takes me to visit my husband in a nursing home every day. He is a really nice guy.”
“John, I had thought you were, well, ah, you know I…” Embarrassment my words. John laughed, “I often experienced reaction. I actually thought about changing the way I look. then I saw it as an opportunity to see others.”
He was right. What he wore outside was just a of the world as he saw it, but what he wore was the spirit of giving and caring the world he wanted to see. I never believed that I should people by the way they dressed. I was with myself for what I did.
The rain stopped and John and I changed the tire. As we shook hands I apologized for my stupidity.
1.A. waited B. repaired C. struggled D. continued
2.A. turned B. approached C. boarded D.[ stopped
3.A. delighted B. calm C. frightened D. excited
4.A. look B. aid C. fine D. hand
5.A. recognized B. met C. noticed D. watched
6.A. amazed B. attracted C. confused D. concerned
7.A. pour B. start C. fall D. break
8.A. possible B. necessary C. unnecessary D. impossible
9.A. ready B. eager C. unable D. unsuitable
10.A. touched B. grasped C. placed D. controlled
11.A. thought B. expected C. replied D. cried
12.A. tone B. voice C. sound D. alarm
13.A. relief B. shock C. ease D. sorrow
14.A. blocked B. stuck C. choked D. struck
15.A. helpful B. shameful C. abnormal D. unfriendly
16.A. And B. So C. But D. Or
17.A. reflection B. conclusion C. concern D. meaning
18.A. around B. along C. through D. inside
19.A. decide B. appreciate C. judge D. sniff
20.A. angry B. grateful C. strict D. content
高三英语完型填空中等难度题查看答案及解析
Justin’s bedroom was so full of flat bicycle tires, bent tennis rackets, deflated basketballs, and games with missing pieces that you could hardly get in the door. His parents pleaded with him to clean out his room.
“What use is a fish tank with a hole in the bottom?” his father asked. But Justin simply smiled and repeated his motto, “Never throw anything out, you never know when it might come in handy.”
When Justin was away from home, he always carried his blue backpack — a smaller bag of his bedroom — a place to store the many objects that he collected. It was so worn and stretched that it hardly resembled a backpack anymore.
Justin had earned a reputation for figuring things out and getting people out of otherwise hopeless situations. Many of his classmates and neighbors sought him out when they needed help with a problem. On the first day of school, his friend Kenny, came looking for Justin.
“Do you think you have something in your backpack that could help me remember my locker combination (箱子密码)?” he asked. “I lost the piece of paper it was written on. I have a science class in two minutes and if I’m late on the first day it’ll make me look bad for the rest of the year.” Kenny looked really worried.
“Relax,” Justin said, taking his backpack off and opened it. “Remember how you borrowed my notebook in my home to write the combination down? Well, I know how I can recover what you wrote.”
He took the notebook and a soft lead pencil out of his backpack. The page that Kenny had written on had left faint marks on another page in the notebook. Justin held the pencil on its side and rubbed it lightly over the marks. Slowly but surely the numbers of the locker combination appeared in white.
“That’ s amazing!” Kenny said, “I owe you one.” And he dashed off to open his locker.
It was just another day in the life of the boy whose motto was “Never throw anything out; you never know when it might come in handy.”
1.Why is Justin’s room in such a mess?
A. He always forgets to clean it.
B. He never throws anything out.
C. He has no time to clean it.
D. He shares the room with his brother.
2.In what way is Justin’s blue backpack used?
A. He uses it as a place to store collected objects.
B. He uses it to carry his books and sports equipment.
C. His parents tell him to clean it all the time.
D. He carries it to remind others of his ability.
3.The underlined phrase “pleaded with” means ________ .
A. ignored B. asked C. pushed D. admired
4.How does Kenny feel toward Justin?
A. Annoyed B. Disinterested C. Grateful D. Angry
高三英语阅读理解中等难度题查看答案及解析
– I’ll never find _____ replacement for my broken glasses.
– Just go get _____.
A. a ; new ones B. the ; new ones C. a ; a new one D. the ; a new one
高三英语单项填空中等难度题查看答案及解析
I was in the band at Davis Air Force Base,North Dakota. Our group required to play for all the general who reached the base. So, one morning, when our commanding officer heard on the radio what General Frost was expected just after noon, he sent us hurried to the airport with our instrument. It turned out that one of the musicians had also heard on the radio announcement that morning. He takes the commanding officer aside for a whispered talk. When they turned, the officer told them the performance was canceled. There was no arrived general — we had almost played for the weather forecast.
高三英语短文改错中等难度题查看答案及解析
According to Andrew, it never would have happened if he had not had a flat tire on Highway 10 last night at about 7:30. He was on his way to attend a three-day sales meeting when he had the flat. tyre. Unfortunately, he did not have a spare, so he pushed the car off the road, locked it up, and managed to thumb a ride back to Pine Grove. It was after eleven o'clock when he finally got home, and it was then that his real problems started.
When Andrew left home at about 5:30, he had told his wife not to expect him back until Thursday or Friday. Knowing that his wife was nervous about staying in the house alone at night, Andrew took the precaution of checking all the windows in the house to be sure they were locked, so that he could report to his wife that the house was secure. He convinced his wife that the house was burglar-proof, and that she would be perfectly safe, providing she bolted (闩上)the front door as soon as he drove away.
Andrew's only thought as he made his way in the dark to his front door was how surprised his wife was going to be to see him, since he was not supposed to be back until Thursday or Friday. He had forgotten about the bolt on the front door. When he turned his key in the lock and the door wouldn't budge, he remembered the bolt. And he remembered that he had carefully locked all of the windows.
Although Andrew didn't know it at the time, a next-door neighbor had seen him approaching the house and had watched him go up the steps to the front door. In the dark, it was impossible for the neighbor to recognize Andrew, and, besides, the neighbor knew that Andrew had gone out-of-town for a three-day meeting. As a matter of fact, Andrew had asked the neighbor to keep an eye on the house while he was gone.
Finding that he couldn't get in, Andrew began pounding(砰砰地敲) on the front door to get his wife to open the door. According to Andrew, however, his wife is a very sound sleeper, and he knew it was going to be hard to wake her up. In the meantime, because of all the noise he had been making, the neighbor was convinced that somebody was trying to break into the house; so she called the police.
When we talked to Andrew at the country jail this morning, he said that he still didn't understand how the police managed to circle the house without his seeing them. He stated that he had decided the only way to get in was to break one of the dining room windows, and that he was about, to hurl his briefcase into the window to break it when two of the officers grabbed him from behind.
Andrew could not make the officers believe that he lived there; so they took him off to jail. Apparently, he did succeed in convincing them that they ought to wake up the woman in the house to check his story. But there was no answer when they knocked at the door. He tried to explain to them that his wife was a very sound sleeper, but they concluded there was nobody in the house.
1.As Andrew had a flat tyre on the way, he________.
A.had to take another car to attend the meeting
B.rode on a bike to attend the meating
C.asked for a lift to go back home
D.borrowed a car to go back home
2.When Andrew was approaching the house________.
A.he was sure he would pleasently surprise his wife
B.he was deep in thought
C.he was sure that his neighbor would help him
D.he was worried about how to wake his wife up
3.The underlined word “budge” in Paragraph 3 probably means.
A.move slightly B.lock tightly C.knock lightly D.close tightly
4.Why did the police officers take Andrew off to jail?
A.It was too late for them to contact Andrew’s wife.
B.Andrew did not explain clearly why he broke into the house.
C.They thought it unnecessary to check Andrew’s story.
D.they concluded that Andrew’s story was a complete invention.
高三英语阅读理解中等难度题查看答案及解析
.The Rubber Duck ____ more attention to the two parks than usual during Mid –Autumn Festival and National Day holidays .
A. paid B. drew C. appealed D. let
高三英语单项填空中等难度题查看答案及解析
Plastic and rubber won't _________ electricity,but copper will.
A.have B.do
C.pass D.conduct
高三英语单项填空简单题查看答案及解析