Batteries can power anything from small sensors to large systems. While scientists are finding ways to make them smaller but even more powerful, problems can arise when these batteries are much larger and heavier than the devices themselves. University of Missouri(MU) researchers are developing a nuclear energy source that is smaller, lighter and more efficient.

“To provide enough power, we need certain methods with high energy density(密度)”，said Jae Kwon, assistant professor of electrical and computer engineering at MU. “The radioisotope(放射性同位素) battery can provide power density that is much higher than chemical batteries.”

Kwon and his research team have been working on building a small nuclear battery, presently the size and thickness of a penny, intended to power various micro/nanoelectromechanreal systems (M/NEMS). Although nuclear batteries can cause concerns, Kwon said they are safe.

“People hear the word ‘nuclear’ and think of something very dangerous,” he said, “However, nuclear power sources have already been safely powering a variety of devices, such as pace-makers, space satellites and underwater systems.”

His new idea is not only in the battery’s size, but also in its semiconductor(半导体). Kwon’s battery uses a liquid semiconductor rather than a solid semiconductor.

“The key part of using a radioactive battery is that when you harvest the energy, part of the radiation energy can damage the lattice structure(晶体结构) of the solid semiconductor,” Kwon said, “By using a liquid semiconductor, we believe we can minimize that problem.”

Together with J. David Robertson, chemistry professor and associate director of the MU Research Reactor, Kwon is working to build and test the battery. In the future, they hope to increase the battery’s power, shrink its size and try with various other materials. Kwon said that battery could be thinner than the thickness of human hair.

1.Which of the following is true of Jae Kwon?

2. Jae Kwon gave examples in Paragraph 4_________.

3.Liquid semiconductor is used to _________.

4.According to Jae Kwon, his nuclear battery _______.

5.The text is most probably a ________.

Batteries can power anything from small sensors to large systems. While scientists are finding ways to make them smaller but even more powerful, problems can arise when these batteries are much larger and heavier than the devices themselves. University of Missouri(MU) researchers are developing a nuclear energy source that is smaller, lighter and more efficient.
“To provide enough power, we need certain methods with high energy density(密度)”，said Jae Kwon, assistant professor of electrical and computer engineering at MU. “The radioisotope(放射性同位素) battery can provide power density that is much higher than chemical batteries.”
Kwon and his research team have been working on building a small nuclear battery, presently the size and thickness of a penny, intended to power various micro / nanoelectromechanical systems (M/NEMS). Although nuclear batteries can cause concerns, Kwon said they are safe.
“People hear the word ‘nuclear’ and think of something very dangerous,” he said, “However, nuclear power sources have already been safely powering a variety of devices, such as pace-makers, space satellites and underwater systems.”
His new idea is not only in the battery’s size, but also in its semiconductor(半导体). Kwon’s battery uses a liquid semiconductor rather than a solid semiconductor.
“The key part of using a radioactive battery is that when you harvest the energy, part of the radiation energy can damage the lattice structure(晶体结构) of the solid semiconductor,” Kwon said, “By using a liquid semiconductor, we believe we can minimize that problem.”
Together with J. David Robertson, chemistry professor and associate director of the MU Research Reactor, Kwon is working to build and test the battery. In the future, they hope to increase the battery’s power, shrink its size and try with various other materials. Kwon said that battery could be thinner than the thickness of human hair.
1. Which of the following is true of Jae Kwon?
A. He teaches chemistry at MU. 
B. He developed a chemical battery.
C. He is working on a nuclear energy source.
D. He made a breakthrough in computer engineering.
2. Jae Kwon gave examples in Paragraph 4_________.
A. to show chemical batteries are widely applied.
B. to introduce nuclear batteries can be safely used.[来源:Z.xx.k.Com]
C. to describe a nuclear-powered system.
D. to introduce various energy sources.
3. Liquid semiconductor is used to _________.
A. get rid of the radioactive waste  
B. test the power of nuclear batteries.
C. decrease the size of nuclear batteries
D. reduce the damage to lattice structure.
4. According to Jae Kwon, his nuclear battery _______.
A. uses a solid semiconductor       
B. will soon replace the present ones.
C. could be extremely thin          
D. has passed the final test.
5. The text is most probably a ________.
A. science news report        B. book review   
C. newspaper ad              D. science fiction story

On the wall in my mother’s bedroom there was a photo, which showed a soldier with a gun.

Below the photo there was the word ”Speaking”.

“Who’s that soldier called Speaking?” I asked one day.

“He was Harold.” She said, ‘He was my only brother. When the Second War began, Harold was eighteen. I was twelve then, and my sisters were ten and nine.”

“Harold liked to play with us, and we often quarreled. When we quarreled, we said, ‘We’re not speaking to you.’ But before long we were all happy again, and then we said, ‘I’m speaking now. Are you speaking to me?’”

“When the war broke out, Harold joined the army. A month later, he came to see us. He brought the gun to show us. Then he went miles away to the war. We didn’t see him for three years, three long, empty years. We didn’t often hear from him. But one day in May there was a loud bang on the front door.”

“I ran to open it, it was Harold! He was an old Harold, a thinner Harold, too. He looked at me with his two green eyes and smiled. That smile was just the same as before, then he said one word “Speaking’”.

‘I didn’t. I couldn’t answer. I just fell into his arms and he dropped his gun. He stayed with us for a month. We played all our old games again. Then he went back to the war, and never came back again. So I wrote the word on the photo.”

60. When I first saw the word “Speaking” below the photo, I thought ____.

A .the soldier was calling “Speaking” 

B. it was taken when the soldier was speaking

C .“Speaking” was the soldier’s name 

D. Mum wished the soldier could speak to her

61. How old was the author’s mother when Harold came back for the last time?

A.Twelve                  B.Thirteen                    C. Fifteen                     D. Twenty-one

62. When Harold came back home, ____.

A.he changed a lot except for his eyes and smile

B.he made a shoot in front of the door

C.his sister could hardly recognize him

D.his sister had another quarrel with him

63. Harold never came back again because ____.

A.he didn’t want to speak to his sister any more

B.he died in a battle

C.his sister had not answered him when he came back

D.he went far away to the war

Andy Tomas is proof of the typical case that life-changing disaster awaits the drunken driver.

“A lot of teachers say, ‘Don’t drink,’ but I’m not going to say that, because I know that students are going to do it,” Andy says. “I just say, ‘Don’t get in a car.’”

As an 18-year-old, he could be a classmate or a friend, and that familiarity adds to the power of his words. He has spoken to more than 2500 high school students so far, and he has noticed their unusual silence.

One year ago, Andy, having been with friends drinking, lost control of his car and was thrown into trees 20 feet away. He was found covered in blood, with many bones broken. He was diagnosed with a severe brain injury and remained in an unconscious state and on life support for nearly three weeks. His skull was opened to reduce pressure on his brain.

At Children’s Specialized Hospital in New Brunswick, Doctor Erin Leahy initially found Andy unable to move the right side of his body. But by the end of his six-week stay, he was able to walk out of the building. Leahy called that an inspiration and a surprise.

Yet Andy’s recovery is incomplete. Brain and muscular therapy(治疗) has helped him regain movement in his right arm, but he still struggles with right hand.

In the process of recovery, Andy has thought deeply about what happened and why, and decided to share his story. Encouraged by his doctor, he began to attending meetings, delivering speeches.

He said he was nervous at first, but has grown used to the spotlight. “I feel like I know how to talk to people.” He said. And his recovery and visible injury help him draw serious attention from students.

Drunk driving, he tells students, is like playing gambles. “You might do it a bunch of times, but something is going to happen.”

Now his days are all about the therapy, work and going to the gym. Mentally, he says, “ I’m a lot happier in my life.”

1. What’s the main purpose of the author?

       A. Warn students about the danger of drinking.

       B. Tell readers the danger of driving a car.

       C. Advise people not to drive a car after drinking.

       D. Show readers Andy’s amazing recovery experience.

2.Why does the author say Andy’s story is powerful as an 18-year-old boy?

       A. Because his family supported him and cared for him carefully.

       B. Because he is just like one of our classmates or friends.

       C. Because doctors and family never gave him up.[

       D. Because his classmates and friends are familiar with him.

3.What does the underlined sentence mean?

       A. Drunk driving will be fined a lot of money eventually.

       B. Drunk driving will eventually have a serious accident.

       C. Drunk driving is as adventurous and thrilled as gamble.

       D. Drunk driving is banned even if you are an experienced driver.

4.What happened to Andy after the accident?

       A. He made a full recovery and returned to his normal life.

       B. He recovered quite well at an unbelievable speed.

       C. He became more experienced and eager for more adventures.

       D. He shared his stories with others to warn them not to try drunk driving.

While watching the Olympics the other night, I came across an unbelievable sight. It was not a gold medal, or a world record broken, but a show of courage.
The event was swimming and started with only three men on the blocks. For one reason or another, two of them false started, so they were disqualified. That left only one to compete. It would have been difficult enough, not having anyone to race against, even though the time on the clock is important.
I watched the man dive off the block and knew right away that something was wrong. I’m not an expert swimmer, but I can tell a good dive from a poor one, and this was not exactly medal quality. When he resurfaced, it was evident that the man was not out for gold – his arms were waving in an attempt at freestyle. The crowd started to laugh. Clearly this man was not a medal competitor.
I listened to the crowd begin to laugh at this poor man who was clearly having a hard time. Finally he made his turn to start back. It was pitiful. He made a few desperate strokes and you could tell he was worn out.
But in those few awful strokes, the crowd had changed.
No longer were they laughing, but beginning to cheer. Some even began to stand and shout “Come on, you can do it!” and he did.
A clear minute past the average swimmer, this young man finally finished his race. The crowd went wild. You would have thought that he had won the gold, and he should have. Even though he recorded one of the slowest times in Olympic history, this man gave more heart than any of the other competitors.
Just a short year ago, he had never even swum, let alone race. His country had been invited to Sydney.
In a competition where athletes remove their silver medals feeling they have somehow been cheated out of gold, or when they act so proudly in front of their competitors, it is nice to watch an underdog.
【小题1】From the passage we can learn that the young man         .