阅读理解。 Do you know why different animals or pests have their special colors?
题型：同步题难度：来源：
used mainly to protect themselves.
Some birds like eating locusts (蝗虫) , but birds cannot easily catch them. Why? It is because
locusts change their colors together with the change of the colors of" crops. When crops are green,
locusts look green. But as the harvest time comes, locusts change to the same brown color as crops
have. Some other pests with different colors from plants are easily found and eaten by others. So they
have to hide themselves for lives and appear only at night.
If you study the animal life, you"ll find the main use of coloring is to protect themselves. Bears, lions
and other animals move quietly through forests. They cannot be easily seen by hunters. This is because
they have the colors much like the trees. They can often hide in the trees and catch some other little
animals.
Have you ever noticed an even stranger act? A kind of" fish in the sea can send out a kind of very
black liquid when it faces danger. While the liquid spreads over, its enemies cannot find it. And it
immediately swims away. So it has lived up to now though it is not strong at all.
B. are easily found by birds
C. are dangerous to their enemies
D. change their colors to protect themselves
B. They have the colors much like their enemies.
C. They hide themselves by day and appear at night.
D. They have to move quietly.
B. They move quietly.
C. They like brown and gray colors.
D. They live in forests.
B. Because the liquid it sends out can help it escape from its enemies.
C. Because the liquid it sends out can kill its enemies.
D. Because it swims faster than any other fish.
B. Colors of Different Animals and Pests
C. The Main Use of Colors for Animals and Pests
D. Some Animals and Pests
答案
举一反三
That"s what you"ll be doing if a Japanese company has its way.
A company called Genepax has invented the first practical car to run only on water. The company
says putting just a litre(升) of water is enough to keep its car going for 60 minutes at a speed of 80
kilometers an hour. And forget about finding a gas station when you"re running on empty. "The car will
continue to run as long as you have a bottle of water to fill from time to time," Genepax CEO Kiyoshi
Hirasawa said.
According to the company, the water gets poured into a tank(籍) at the back of the car and uses a
generator(发电机) to break it down and tum it into electrical (电的) power.
Genepax can"t say yet when you"ll be taking one of their cars for aride,but they hope it will one day
water down your need to ever visita gas station again.
B. Japan.
C. America.
D. Canada.
B. There is a tank filling with water in the front of the car.
C. Genepax had told the public when its cars could be produced.
D. Genepax"s cars must be very expensive.
B. 80 kilometers.
C. 120 kilometers.
D. 160 kilometers.
B. 激发
C. 降低
D. 满足
| Both, inside, could, experiment, grown |
| 阅读理解。 |
 Ask any student which subject he or she hates most. 9 out of 10 students will answer "math". No matter which country you visit, no matter which grade you are in, you may not learn art, geography, chemistry or Chinese, but you always learn math. Why is this so? How come so many students hate math, and yet cannot avoid learning it in school? Jenny Sanders, a high school student in California, asks, "What good do we get from learning math? We can use computers to compute numbers, and we can use computers to store information. I think learning math at school is a waste of time." However, there is much more to math than just learning to add and subtract (减) numbers. In fact, math is not so much about calculation (计算) as it is about learning to think logically (逻辑地) and solving problems. Of course, Jenny was right that we can use computers to do calculations, but how would we even know how to use the computer if we can"t think logically? In short, computers are only tools when solving problems. For example, imagine you are a cook and must serve dinner to 100 guests. How should you divide your resources so that you can get the job done most efficiently (高效地)? In situations like this, the a  bility to think logically will get you to a reasonable answer and solve your problem. |
| 根据材料内容选择最佳答案，并将其标号填入题前括号内。 |
| 1. According to the passage, which subject do students always learn in different grades at school? |
| A. Chinese. B. Math. C. Geography. D. Art. |
| 2. What does Jenny Sanders think of learning math? |
| A. Interesting. B. Boring. C. Useless. D. Difficult. |
| 3. Which of the following is TURE according to the passage? |
| A. 90﹪of the students hate learning math. B. Students can learn math well with computers. C. Math can do calculations and store information. D. Math helps students learn all the other subjects well. |
| 4. What does the underlined word "resources" mean in the passage? |
| A. 科目 B. 效率 C. 信息 D. 资源 |
| 5. What does the writer want to tell us? |
| A. Math is just learning to add and subtract numbers. B. Math can be good for both our body and our mind. C. Math helps us think logically and solve problems. D. Math can help students find a good job in the future. |
| 阅读理解。 Guinea Pigs (荷兰猪) are friendly animals that enjoy being held and seldom bite. They come from South America and can live as long as seven or eight years. Housing Your Guinea Pigs can be kept indoors all year round. They do not like sudden loud noises, so it"s best to put their cages in a quiet place. A wooden cage is good, although a metal cage can also be used if it has a plastic floor. Feeding Guinea Pigs only eat grass and other plants. It"s important to give them some fresh fruit and vegetables. Fresh drinking water should always be provided in a bottle, and food should be given in bowls, Guinea Pigs will eat plastic! Looking after your Guinea Pigs Give your Guinea Pigs as much exercise as possible, and provide them with an outdoor run, but be sure to keep cats and dogs out of the way. Young Guinea Pigs are nervous. For the first few days, talk gently to your Guinea Pigs to build up trust, then slowly introduce your hands into the cage. Your Guinea Pigs will become curious and more confident around you. After a week or two, try picking up your pets using both hands. This is a good time to start feeding your Guinea Pigs something which should be done daily. 1 . How long can a Guinea Pig live? A. Five to Six years. B. Six to Seven years. C. Seven to eight years. D. Eight to nine years. 2. What kinds of cages are the best for keeping Guinea Pigs? A. Glass cages. B. Metal cages. C. Plastic cages. D. Wooden cages. 3. Which of the following is true according to the passage? A. Guinea Pigs like biting their owners very much. B. Guinea Pigs can be kept indoors all the time. C. Guinea Pigs eat any kind of food, either plants or meat. D. Guinea Pigs needn"t be fed everyday. 4. What does the passage mainly talk about? A. Some kinds of cages for pets. B. Guinea pigs from SouLh America. C. Different food to feed different pets. D. The ways to build up pets" trust. |
| 阅读理解。 |
| Robots seem very new to most people. But they have a long history. The first one was made by a Greek inventor. You may see robots in some films. The robots in these films are stronger, faster and cleverer than people. In real life, most robots are used in factories. They are used to do many dangerous,difficult or boring jobs. Some people can"t look after themselves and robots are used to help them. For example,some people can"t see,so many of these people use a dog to help themselves move around. This dog is called a guide dog. Scientists are making a robot to help them.ln the future,robot dogs might take the place of these guide dogs. Robots are also used in American hospitals. At one hospital,a robot takes meals from the kitchen to the sick people"s rooms. It never loses its way because it has a map of the hospital in its computer system. In the future,robots will work in space. But robots will never take the place of humans. They can,however, help us in a lot of different ways. |
| 棍据短文内容,判断下列句子的正（T）误（F） 。 ( )1. Robots have a long history. ( )2. The first robot was invented by a Greek. ( )3. Robots can only be seen in films. ( )4. Robots can help some people look after themselves. ( )5. Today"s robots have quite a few different uses. ( )6. A robot cooks meals for the sick people at an American hospital. ( )7. Robots can help humans a lot both now and in the future. |