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. 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. |
Jae Kwon gave examples in Paragraph 4_________.
| A．to show chemical batteries are widely applied. |
| B．to introduce nuclear batteries can be safely used. |
| C．to describe a nuclear-powered system. |
| D．to introduce various energy sources. |
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. |
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. |
The text is most probably a ________.
| A．science news report | B．book review |
| C．newspaper ad | D．science fiction story |
As far back as he could remember, Larry had longed to go to Hollywood and become a film star. The young man’s hopes for success were broken again and again, however. Hollywood just did not seem interesting. When he first came to California, Larry had 
decided never to give up and return home without success. Therefore, he kept on trying. Someday, he told himself, his big opportunity would come.
Larry found a job parking cars for one of Hollywood’s big restaurants. His pay w
as basic, but since the guests were kind enough to give him more money, he man
aged to make a living. One day he recognized an important film director driving into the parking lot and getting out of his car. Larry had recently heard that the man was ready to make a new picture.
Larry got into the car and prepared to drive it on into the lot and park it. Then he stopped, jumped out, and ran over to the director. “Excuse me, sir, but I think it is only fair to tell you that it is now or never if you want me in your next picture. A lot of big companies are after me.”
Instead of pushing away the boy, the director laughed, then wrote something on a card and handed it to the young man. “Come and see me tomorrow.”
Larry got a small part in the director’s next film. He was on his way!Which of the following was Larry really interested in?
| A．Working as a waiter. | B．Becoming a film star. |
| C．Parking cars for film stars. | D．Owning a big company. |
Why did Larry find a job parking cars?
| A．Because he liked the job. |
| B．Because the parking lot was near Hollywood. |
| C．To make a living and wait for the opportunity. |
| D．To see a lot of film stars and work for them. |
After reading the story, what can we know about the film director?
| A．He wanted to laugh at Larry. |
| B．He recognized Larry at first sight. |
| C．He was kind and gave Larry a try. |
| D．He thought Larry would become a star. |
“He was on his way”refers to the fact that_______.
| A．he gave up and returned home | B．he began to work towards success |
| C．he took a journey to Hollywood | D．he had difficulty in playing the small part |
To son, Cecil,
Just a quick note before I start in earnest. When I wrote this, you were 8, still a little boy. In 2002, I was called to active duty in the Marine Corps in the war on Terrorism (恐怖主义). On the 11th of September 2001 when America was attacked, I knew that I would eventually have to go and I was filled with a deep sense of sadness. That night as you and Keiko were asleep, I looked at your little faces and couldn’t help but fight the tears. I knew it would be hard for you because I had a similar experience. When I was a little boy aged 6, my dad, your Grandpa Cawley, was sent to Vietnam during the war there. I remember how much I missed him, too. But now unfortunately I have come to realize just how rough it must have been for Grandpa to be away from his children for a year. Thinking about this, I wanted to put my thoughts and feelings down for you and your sister. I am so sorry that I had to leave for such a long time. There is no place I would rather be than with you and Keiko. You two are the lights of my life. I have known no greater joy than in the few years since you two were born. I hope to have many more years with you. If this doesn’t happen, then know that I love you more than words can express. If for some reason I don’t make it home, I will need you to take care of your little sister and your Mom. You will be the man of the Cawley family. Be good my son and God will watch over you as he has me. I will be waiting impatiently for the time when we can all be together again.The writer of the letter may be ______.
| A．an American soldier in the battle field |
| B．an American policeman |
| C．a soldier in the Vietnam War |
| D．a postman working far away from home |
Keiko is the ______ of the writer.
| A．wife | B．son | C．daughter | D．sister |
One of the experiences the writer and his son had in common is that ______.
| A．they both experienced the Vietnam War |
| B．their fathers had to leave them and fight abroad. |
| C．they used to study in the same school |
| D．they were both eight when the fathers had to leave them |
We can infer(推断) that ______.
| A．the writer was a devoted son |
| B．the writer was a brave soldier |
| C．the writer realized he might die in the battle field |
| D．the writer’s wife was suffering from a terrible illness. |
Starting from April, 2010, you won’t be hearing the word “NBA” on sports programs on CCTV. Instead, sport host will give the full Chinese name when they refer to the NBA – National Basketball Association. You also won’t hear any other English abbreviations (缩略词) on CCTV’s Chinese programs, such as GDP (gross domestic product), or WTO (World Trade Organization). You will hear their Chinese translations.
CCTV received a notice from the State Administration of Radio, Film and Television telling it to avoid using English-language abbreviations in their reports to protect the “purity” of the Chinese language. A few other TV stations also received the notice.
Fu Zhenguo, an editor of People’s Daily, is one of the people who suggested the change. “Firstly, using English in a Chinese-speaking environment is against Chinese law,” he said. “Then, using English on Chinese TV programs is unfair to people who don’t understand English. What’s worse, it will have a bad language influence on kids and teenagers.”
A lot of netizens have criticized the move, saying that it will cause problems for them.
“I understand what CD, VCD and DVD mean when I hear them. But I won’t know what the TV programs are talking about if I hear those products’ full Chinese names,” a netizen wrote in a BBS post. Following the same post, another netizen wrote jokingly: “I’m not listening to my MP3 now. I’m listening to my Moving Picture Experts Group-1 Audio Layer 3 (动态影像专家压缩标准音频第三层面).”What does the underlined word “purity” in the second paragraph mean?
| A．纯正 | B．高贵 | C．时髦 | D．潮流 |
How many reasons did Fu Zhenguo list to show his support for the change?
| A．1 | B．2 | C．3 | D．4 |
Some netizens went against the change because_______________.
| A．the application of abbreviations will make Chinese popular. |
| B．the application of abbreviations will attract the youth. |
| C．the application of abbreviations will not simplify the understanding. |
| D．the application of abbreviations will not bring Chinese to an end. |
What can be the full name of CCTV mentioned in the text?
| A．Close Closet Top Video | B．China Central Television |
| C．China Common Time Voice | D．Closed-Circuit Television |
Taylor sings with heart
The music industry is never short of teen pop stars with wonderful looks, but it doesn’t often find one like US singer Taylor Swift. “Beneath Taylor Swift’s not-a-girl, not-yet-a-woman sweetness hides a very skillful songwriting technique (技巧),” writes Leah Greenblatt with Entertainment Weekly.
Songwriting, the country singer explains, is “how I deal with problems. I am used to writing about things that really influences me most.” So in her songs, there is always something true and honest. They seem like stories from a diary. And that certainly helps Swift attract her audience.
She’s sold more than 13 million copies worldwide of her first two albums, 2006’s self-titled debut (首张专辑) and 2008’s Fearless. She’s the youngest artist ever to be named Artist of the Year at the American Music Awards. Not surprisingly, there were great expectations for her third album, Speak Now, which came out late last month, where she again returned to her own life for material. The 14 songs “are all about the last two years... when life was a little bit bigger and crazier,” says Swift. “So I’ve written about the lessons and confusion and heartbreak and all the different things that go along with being 18, 19 and 20.”What led to Taylor’s fame?
| A．Her wonderful looks. | B．Her songwriting skills together with her looks. |
| C．Her beautiful voice. | D．Her special life experience in her teenage years. |
Which of the following is true?
| A．Taylor is now in her twenties. |
| B．Taylor’s the youngest Artist of the Year at the Academy Awards |
| C．Taylor has produced three albums up till now. |
| D．Taylor has sold more than 13 million copies worldwide. |
What may be written in the album, Speak Now?
| A．Her unhappy experience with her boyfriend. |
| B．Her concern for her popularity. |
| C．Her happy childhood. |
| D．Her worries for environmental pollution. |
Britain is facing a sharp rise in its rat population as growing numbers of people leave what they cannot finish of the fast food in the street, an environment group warned .Keep Britain Tidy said the rats were stopping their traditional hunts underground and were running across the streets, invited by burgers, pizzas and crisps left behind by man. “The rat population is on the rise and soon it’ll be as common to see a rat on our street as it is to see a dog or a cat,” said group Director, Sue Nelson. The practice of spreading fast food litter and scraps on the street rather than in the dustbin—with young men the worst group—was behind the rise. According to the National Rodent Survey in 2005, Britain’s rat population has grown by nearly one quarter since 2000 and is now estimated at 60 million, two million more than the human population. On average a rat can give birth every 24-28 days and just a single pair of rats can produce a family of 2,000 a year. Around 200 people a year get Weil’s Disease –an infection which can lead to liver or kidney（肝肾）failure and eventually death and which is carried in rats’ waste. To attract people’s attention to the problem, Keep Britain Tidy produced a cinema ad with a title “How close do you want them to get?” The ad gave a shocking image of a young woman sleeping in a bed of rats--reminding people of the terrible scene from James Herbert’s classic horror tale The Rats, in which rats begin to hunt for humans.Where did the rats use to search for food?
| A．In the street | B．Under the ground |
| C．From the dustbins | D．In burger shops |
What was the rat population in Britain in 2000 according to the writer?
| A．Around 60 million | B．Around 45 million |
| C．Around 38 million | D．Around 2 million |
We may infer from the passage that ______________.
| A．Weil’s Disease will finally end the world |
| B．pizzas and crisps will become unpopular |
| C．rats will put human beings’ life in danger |
| D．young people should take the responsibility for the rat population |
By writing the passage, the author tries to _____________.
| A．close some of the burger and pizza restaurants |
| B．draw the public attention to the problem of rats |
| C．prevent the rats from growing up |
| D．making an advertisement for the classic horror tale The Rats |