题目
题型：不详难度：来源：
◆Keep your computer in a cool room. Too much or too little heat is bad for computers. Most computers work best at a temperature of 5 ºC—30 ºC.
◆Don’t let people smoke cigarette(香烟）near your computer. Smoke of all kinds is very bad for many parts of a computer and can cause many problems.
◆Don’t eat or drink when you are near your computer. Pieces of food and a little water in the keyboard can also cause many problems.
◆Make sure the screen is the correct distance from your eyes. If you wear glasses, make sure these glasses are correct for using with the computer. Some people use a different pair of glasses when they use a computer.
◆Keep your screen clean and don’t have it too bright. A dirty screen can hurt your eyes. A very bright screen can also be bad for your eyes.
小题1: According to the passage you should use your computer .
| A．in a small room | B．in a big room |
| C．in a cool room | D．below 5ºC |
| A．wear glasses | B．smoke cigarette |
| C．eat some hamburgers | D．clean the keyboard with water |
| A．buy a pair of sunglasses | B．keep your screen clean |
| C．have your screen very bright | D．keep your screen near your eyes |
答案
小题1:C
小题2:A
小题3:B
解析
试题分析：本文给我们介绍了用电脑时的几个注意事项。把电脑放在凉爽的房间里，不要让人在你电脑附近吸烟，当你在电脑附近时不要吃喝东西，注意屏幕离你眼睛的正确距离，保持屏幕清洁等。
小题1:细节理解题。根据这篇短文你应该在一个凉爽的房间里用电脑。根据Keep your computer in a cool room.可知答案，故选C。
小题2: 细节理解题。当你用电脑工作时， 你可以戴眼镜。据第三、第四段可知B. smoke cigarette
C. eat some hamburgers D. clean the keyboard with water是不可以做的事，故选A。
小题3:细节理解题。如果你想关照你的眼睛，当你用电脑的时候你应该保持屏幕清洁。据最后一段Keep your screen clean and don’t have it too bright. A dirty screen can hurt your eyes.可知屏幕脏会伤害你的眼睛，故选B。
核心考点
试题【 Many young people use computers, but few of them know how to look after them. R】；主要考察你对科普环保类等知识点的理解。[详细]
举一反三
One day, his grandpa said to him, “Mario, I know that you don’t have as many friends as you think. Many of them are not true to you.”
Mario thought maybe his grandpa was right. However, he wasn’t sure how he could test whether his schoolmates were real friends or not, so he asked his grandpa. The old man answered, “I have just exactly what you need. It’s in my room. Wait a minute.” The old man left, soon returning as if(好像) carrying something in his hand, but Mario could see nothing there.
“Take it. It’s a very special chair. Because it’s invisible, it will be hard for you to sit on it. However, if you manage to sit on it, you can use the chair’s magic power（力量） to tell who your real friends are.”
Mario took the strange invisible chair to school. At break time he asked everyone to form a circle, and he put himself in the middle, with his chair.
“Nobody move. You’re about to see something amazing，” said Mario. Then he tried sitting on the chair. Having difficulty seeing it, he missed and fell to the ground. Everyone had a pretty good laugh. “Wait, wait,” said Mario, making another try. But again he missed the seat.
Mario didn’t give up. He kept trying to sit on the magic chair. Finally, he did it. This time he felt himself in mid-air.
Then he experienced the magic that his grandpa had been talking about. Looking around, Mario saw George, Lucas and Diana holding him up, so he wouldn’t fall. But some schoolmates whom he had regarded as friends had done nothing but made fun of him. Mario was quite thankful to his grandpa, who helped him test who his true friends were.
小题1:Mario’s grandpa gave him a special chair to _____.
| A．sit on in the school |
| B．be his birthday present |
| C．test who his true friends are |
| D．play games with his friends at school |
| A．感激的 | B．有帮助的 |
| C．神奇的 | D．看不见的 |
| A．his friends taught him |
| B．he had tried many times |
| C．his friends held him |
| D．the chair had magic power |
| A．A Magic Chair | B．A Kind Grandpa |
| C．Mario’s True Friends | D．How to Test Friends |
We often consider plants as the furniture of the natural world. They don’t move; they don’t make sounds, they don’t seem to act on anything. But as is often the case, plants talk to each other all the time. And the language is chemical.
Over the years, scientists have reported that different types of plants, from trees to tomatoes, give out chemicals into the air to help neighboring plants. These chemical warnings can spread information about one plant’s disease or infestation(虫害), so other plants can protect themselves. But how plants receive and act on many of the information exactly is still mysterious.
In this week’s Science Magazine, researchers in Japan offered some explanations. They have found out one chemical message and traced it all the way from beginning to end.
The scientists looked at tomato plants infested by a common pest(害虫). To start out, they grew plants in two separate plastic spaces connected by a tube(管子). One plant was infested and placed upwind and the other was uninfested and placed downwind. The downwind plants were later exposed(暴露) to the pest. The results showed that plants near sick neighbors before were able to protect themselves better against the pest.
They found one chemical appeared more often in the exposed plants. The chemical is called HexVic. The scientists discovered where HexVic come from, and put it over healthy plants. Those plants were then able to produce HexVic. Researchers made sure that uninfested plants could fight off bugs and diseases. How do they know when to protect themselves? They are warned first by their friendly plant neighbors.
It is not a simple story, and it may be happening in more plant species than tomatoes. It may also be happening with more chemical signals that are still unknown to us. In a word, we know that plants not only communicate, but also look out for one another.
小题1:The underlined “traced” in the fourth paragraph probably means _________ here.
| A．reported | B．followed |
| C．doubted | D．developed |
① Place the infested plant upwind.
② Place the uninfested plant downwind.
③ Expose the downwind plants to the pest.
④ Grow plants in two separate plastic spaces connected by a tube.
| A．③①②④ | B．①④③② |
| C．④①②③ | D．④②①③ |
| A．Paragraph 3 | B．Paragraph 4 |
| C．Paragraph 5 | D．Paragraph 6 |
| A．Communicating Plants and Terrible Diseases |
| B．Talking Plants and Friendly Warnings |
| C．Protecting Plants and Clear Information |
| D．Growing Plants and Mysterious Chemicals |
The big bike has eight sets of pedals(踏板) for kids, a driver seat for an adult, and three other seats, comfortably letting little kids for their trip to and from school. The bike even has a motor, which can help with high hills or at times when few kids on it.
So far, Thomas tells Fast Company, he’s sold 25 school-bikes, at a price of $ 25,000 each—less than it would cost to buy a traditional school bus with the same number of seats. Along with the traditional color, the bikes ,are colored yellow so that they can be seen easily.
Thomas says he’s sold school bus bikes to neighboring countries such as Belgium, England and Germany, but so far, the school bus bike hasn’t been sold in the United States. If the U.S. agrees to buy this kind of school bus bike, it could do a lot of good to improve exercise for a young age and help them keep healthy.
小题1:How do people in the Dutch usually go to work?
| A．By car. | B．By bus. |
| C．By bike. | D．On foot. |
| A．Three. | B．Eight. |
| C．Nine. | D．Twelve. |
| A．the color yellow is easy to paint |
| B．yellow buses can be seen easily |
| C．yellow is the national color of Dutch |
| D．it’s the designer’s favorite color |
| A．America. | B．Germany. |
| C．England. | D．Belgium. |
| A．Thomas made a new kind of school bus. |
| B．A school bus usually costs $ 25,000. |
| C．Thomas sold bikes to Asian countries. |
| D．Riding school bus bikes helps keep kids healthy. |
However, making lots of plastic is not a good idea for many reasons. First of all, we need a lot of oil for plastic products. We usually use oil as a source(资源) of energy. If we reduced the number of bottles we made, we wouldn’t need so much oil. Plastic bottles also pollute the environment. If we recycled all our plastic bottles, we wouldn’t need so much space for rubbish dumps. But in Greece, we don’t recycle much of the plastic we use. In 2006, Greeks recycled only about 10% of plastic waste. The rest became rubbish on land and in rivers and sees. So next time you want to throw away a plastic bottle in the litter bin, stop and think. If you recycled it, you would help the environment. But what can you do when there isn’t a recycling bin near you? Well, there are loes of useful ways that you can use your bottles again. For example, an empty bottle makes a great piggy bank for your pocket money, and if you cut a bottle in half, you will have a plant pot. Go green! You can make a difference.
小题1:What is not mentioned about bottled water in this passage?
| A．It’s healthy. | B．It’s clean. |
| C．It’s easy. | D．It’s expensive. |
| A．energy | B．oil |
| C．rubbish | D．plants |
| A．10% | B．50% | C．80% | D．90% |
| A．To recycle them. | B．To make a piggy bank. |
| C．To make a plant pot. | D．To drop them into the river. |
| A．To make a different life, you’d better go outside. |
| B．To look different, you’d better wear green clothes. |
| C．To protect the environment, you can do something. |
| D．To go green, you should use plastic products. |
When cold weather comes, many birds move to warmer places to find food. Some fishes give birth in warm water and move to cold water to feed. The most famous migration is probably the migration of fish, which is called “salmon”(鲑鱼). This fish is born in fresh water but it travels many miles to salt water. There it spends its life. When it is old, it will return to its birthplace in fresh water. Then it gives birth and dies. In northern Europe, there is a kind of mouse. They leave their mountain homes when they become too crowded. They move down to the low land. Sometimes they move all the way to the seaside, and many of them are killed when they fall into the sea.
Recently, scientists have studied the migration of a kind of lobster(龙虾). Every year, when the season of the bad weather arrives, the lobsters get into a long line and start to walk across the floor of the ocean. Nobody knows why they do this, and nobody knows where they go. So, sometimes we know why humans and animals move from one place to another place, but at other times we don’t. Maybe living things just like to travel.
小题1:The reason for most of the animals to move is ________.
| A．to get away from un-crowded places | B．to find their own parents |
| C．to want to kill themselves | D．to find food more easily |
| A．In fresh water. | B．In salt water. |
| C．In mountain homes. | D．In its birthplace. |
| A．When their homes become too crowded. |
| B．When the season of the bad weather arrives. |
| C．When they want to give birth. |
| D．When their food is eaten up. |
| A．迁徙 | B．习性 |
| C．运动 | D．寻觅 |
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