题目内容
---That must have been a terrible experience．
---Yeah．I in the damaged car，unable to move．
A．was stuck B．have been stuck C．am stuck D．had been stuck．
A
【解析】
试题分析:句意：——那肯定是一次可怕的经历。——是的。我被卡在损坏的汽车里，不能动弹。根据上文must have done可知句子讲述的是过去发生的事情，应该用一般过去时，答案选A
考点：考查动词时态。
--Jay Zhou along with Song zuying __________ invited to the concert. Did you enjoy that part?
---No, no sooner __________ than they sang their top hit Ben Cao Gang Mu.
| A．was; I had left | B．were; I have gone |
| C．were; did I leave | D．was; had I left |
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.
【小题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. |
| 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. |
| 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. |
| A．uses a solid semiconductor | B．will soon replace the present ones. |
| C．could be extremely thin | D．has passed the final test. |
| A．science news report | B．book review |
| C．newspaper ad | D．science fiction story |
You probably know you should say "please" and "thank you" at restaurants. You probably know the rules of a library. You know you should respect and be nice to your classmates. But do you have music manners?
Keep It Down! You have to notice the volume of your music. You should not play your music so loud that everyone around you can hear it. Some people might even get angry. Usually, when you play the music loud on an MP3 player, other people can't hear the words of the song. They just hear a loud sound. No one wants to listen to this. Very loud music can also be bad for your ears. So even if you are alone when listening to our MP3 players, you shouldn't turn it up too high.
Take Them Off! You need to know when to turn your MP3 off and put it away. Libraries, and schools don't allow MP3 players. There are other places, like museums, that don't have rules, but it would be rude to have your MP3 player on. Sometimes, it doesn't make sense to listen on your MP3 player at event. Why would you listen to music at a play, a movie or a sporting event? You would miss what is going on and others would wonder why you even came.
Take One Out! Once in a while it's okay just to take out one earphone and not other. Imagine you are listening on your MP3 player when someone asks you the way. It would not be rude to take out one earphone, tell him the way, and put back the earphone and continue listening. You can also do this when you order food at a fast-food restaurant or when you answer the telephone and it's not for you.
It's Your Choice! There are times when you need to decide what is best. F or example, some people can listen to music on their MP3 players when reading books, while others think it is disturbing. In cases like this, you need to do what seems right for you.
【小题1】The underlined word "volume" in Paragraph Two probably means "_________."
| A．the type of music | B．the length of a song |
| C．the amount of a sound | D．the colour of an MP3 player |
| A．is not enjoyable | B．hurts our ears |
| C．is bad for MP3 players | D．makes us tired |
| A．we will miss part of the play | B．the actors will get angry |
| C．others won't hear the play well | D．the theatre won't allow it |
| A．have dinner with our parents | B．talk to friends on the phone |
| C．watch a sporting event | D．show others the way |
| A．Music Lovers | B．MP3 Players |
| C．Music Manners | D．MP3 Earphones |
TANG Dynasty writer Du Mu once wrote in a poem titled Qingming: "The ceaseless drizzle drips all the dismal day; So broken-hearted fares the traveler on the way.Where can a wine house be found to drown his sadness ?A cowherd points to Almond Flower (Xing Hua) Village in the distance."
Qingming, the traditional tomb-sweeping day on the Chinese lunar calendar, falls on April 4 this year. Qingming Jie was proclaimed（正式宣布） a Chinese national holiday in 2008. It is a time for remembering loved ones who have departed (去世). People visit their ancestors’ graves to sweep away the dirt and get rid of any weeds. They also leave offerings (祭品) of food and flowers, and burn incense (香) and paper money. Chinese tombs are usually built in the woods or on mountains, far from the city. It is believed that an area that faces south, with many pine trees, is a proper place for a tomb. People believe such a place will make the ancestors happy, and in return, they will look after the living family.
Nowadays, more and more residents are choosing environmental-friendly ways to spend the holiday such as flower sacrifices and memorial ceremonies on the Internet or at home. As one of the traditional ways to celebrate Tomb-sweeping Day – burning paper or incense – isn't exactly good for air quality
In contrast to the sadness of the tomb sweepers, people also enjoy hope of Spring on this day. The Qingming Festival is a time when the sun shines brightly, the trees and grass become green and nature is again lively. Since ancient times, people have followed the custom of Spring outings. At this time tourists are everywhere
Many people fly kites on Tomb Sweeping Day. They are usually made from a bamboo crossbow with coloured paper. The kite vibrates and buzzes as it rises into the sky, counterbalanced by its tail. Large kites can be as broad as three metres across, with a tail of six to ten metres. Most kites have a rectangular shape, and many have patterns of crabs, centipedes, butterflies, dragonflies, or Chinese characters such as "good fortune" or "long life".
【小题1】What’s the main idea of the second paragraph?
| A．The cultural difference between the east and the west. |
| B．The traditional customs on tomb-sweeping day. |
| C．Various ways to care for the dead in the world. |
| D．Qingming Festival |
| A．Weeping over the passed-away. |
| B．Flying kites made from bamboo and paper |
| C．Sending flowers to their ancestors’ graves. |
| D．Burning incense and paper money for the dead. |
| A．Du Mu ,the well-known poet in Song Dynasty wrote a poem about Qing Ming. |
| B．Qingming Festival used to be a Chinese national holiday. |
| C．People have the custom of flying kites on Qing Ming. |
| D．Those whose ancestors were buried in proper places will have a bright future. |
| A．enable us to observe traditional tomb-sweeping day. |
| B．show traditional and present ways to spend Qingming Festival . |
| C．educate people to show their respect to the ancestors |
| D．raise people’s awareness of environmental protection. |