What is color? Why do some of the things around us look red, some green, others blue? Colors are really made...

题型：阅读选择题类：常考题难易度：普通

What is color? Why do some of the things around us look red, some green, others blue?
Colors are really made by deflected (反射) light. We see color because most of the things reflect light. In the same way, if something is green, it reflects most of the green light. If something reflects all light, it is white. If it doesn't reflect any light, it is black.
Some of the light is reflected and some is taken in (吸引) and turned into (变成) heat (热能).The darker the color is, the less light is reflected, the more light is taken in. So dark-colored clothes are warmer in the sun than light-colored clothes.

（1）、When something reflects light, we can _____.

A、see its color B、see its heat C、not see its color D、see nothing

（2）、Something looks white because it reflects _____.

A、some light B、no light C、all light D、most light

（3）、the dark-colored clothes are warm because ____ is taken in.

A、more light B、less light C、more color D、less color

（4）、In summer ______ make people feel cool.

A、dark-colored clothes B、red-colored clothes C、green-colored clothes D、light-colored clothes

（5）、What's the best title(标题)of this passage( 短文 )?

A、Dark color B、Color C、Heat D、Clothes

举一反三

   A fish that lives in America can live out. of water for months at a time, similar to how animals got used to land millions of years ago, a new study shows.
   The Mangrove Rivulus, a kind of little fish, lives in small pools of water. When their living place dries up, they live. on the land, said Scott Taylor, a researcher in Florida.
   The fish can grow as large as three inches. They group together and breathe air through their skin before they can find water again.
The new scientific discovery came during a trip.
   "We were travelling for fun. and one day I kicked over a log (圆木) and the fish came out," Taylor told reporters by telephone. He said he would make his study on the fish known to the public in an American magazine early next year.
   In lab tests, Taylor said he found the fish can live up to 66 days out of water without eating. Some other fish can live out of water for a short period of time. The walking catfish found in Southeast Asia can stay on land for hours at a time, while lungfish(肺鱼) found in Australia, Africa and South America can live out of water, but only in a not active(活波的)way. But no other known fish can be out of water as long as the Mangrove Rivulus and keep active, according to Patricia Wright, a biologist at a Canadian University.
   More studies of the fish may tell how animals changed over time."These animals live in conditions similar to those millions of years ago, when animals began to move from water onto land," Wright said.

阅读短文，选择正确答案
   In most parts of the world, many students help their schools make less pollution（污染）. They join “environment（环境）club”. In an environment club, people work together to make our environment clean.
   Here are some things students often do.
   No-garbage（垃圾）lunches. How much do you throw away after lunch? Environment clubs ask students to bring their lunches in bags that can be used again. Every week they will choose the classes that make the least garbage and report them to the whole school.
    No-car day. On a no-car day, nobody comes to school in a car not the students and not the teachers. Cars give pollution to our air, so remember: walk, jump, bike, or run! Use your legs! It's lots of fun!
   Turn off the water! Did you know that toilets（抽水马桶）can waste twenty to forty tons（吨）of water an hour? In a year, that would fill in a small river! In the environment clubs, students mend those broken toilets.
   We love our environment. Let's work together to make it clean.

    Earthquakes can be very scary（吓人的）. But you need to keep your mind stable (坚定的) in order to make sure you are safe. Be calm and try not to run here and there.
    If you manage to come out of your house, go to an open space like a garden or a park where you will be a lot safer. If you live quite some floors above in your building, try to find a place near a bulky(坚固的) object such as a bed. Curl up (蜷缩) and sit on the floor and make sure you are not near a window, fireplace, gas stove and so on. Remember don't use lifts or escalators.
    Some people say you should stand on a doorway. That is not true. If the doorway jambs (侧壁) are weak, they might fall on you. Also if people want to pass through that door, you may stop them. Leave all doorways free.
    Another important thing to keep in mind is that you mustn't climb down the stairs during an Earthquake. If the tremors (震动) stop, after a few seconds, just climb down the stairs as quickly as you can and move out of the building, but don't run.
    Earthquakes usually destroy gas pipes and electrical wires. Turn off the main gas. And don't light candles or lighters and create an even bigger disaster.
    If you're driving and feel a shake, stop your car at the side of the road and get out. Make sure you are not on a bridge. Bridges and overhead roads (高架路) have the biggest danger of falling.

                                                                                             150 Years of Cool
   Look in the bedrooms of young people around the world. You will probably find a pair of blue jeans in each room. Jeans are very popular all over the world.
   Jeans give you the feeling of comfort, youth and energy. They have long been liked by every person.
   Levi Strauss is an American company. It first made blue jeans. The company was founded in 1853 by 24-year-old Levi Strauss. Twenty years later, he made the first blue jeans in the world. The jeans were used as working trousers for the cowboys of the American West.    During the Second World War, American soldiers brought blue jeans to Europe and Asia. People there began to wear jeans. Little by little, they become cool.
   People from different countries like different styles of jeans. Americans like to wear simple and single-colored jeans, but many Chinese like to wear jeans with lots of different colors.
   Jeans now can be seen everywhere: However, in many places, it's not always good to wear jeans. No matter how good they may look, or what color they are, it's often not right to wear jeans in formal places. But, when you are out, relaxing and having fun, jeans are the best choice

阅读理解

Anyone who has had a long-term illness knows that recovering at home can be boring. This can be especially true for children. They may feel cut off from their friends and classmates. Now, these children may have a high-tech friend to help feel less lonely. That friend is a robot.

The robot is called Avatarl (AV1). It takes their place at school. Through the robot, the children can hear their teachers and friends. They can also take part in classes from wherever they are recovering. And the children's school friends must help. They carry the robot between classes and place the robot in the classroom.

A Norwegian(挪威的) company called “No Isolation” created the robot. There are another two co-founders, Karen Dolva and Marious Aabel. Dolva explains how the robot works. She says from home the child uses an iPad or a phone to start it, control the robot's movements with touch and talk through it. The child can take part in classroom activities. The robot is equipped with speakers, microphones and cameras that make communication easy. So it's the eyes, the ears and the voice of the child at school. Inside AV1 there is a small computer connected to a 4G network.

AV1 is designed to be tough. It won't allow water to pass through it and can take a fall from a desk without damage. AV1 is large and looks like a human for a reason. Dolva says it can't be just a tiny camera because the other kids can't pick it up and take it with them. This is important because the robot is supposed to be a friend to the children. Hopefully AV1 will help some children feel less lonely while they were absent from class.

阅读下列短文，从每题所给的A、B、C、和D四个选项中，选出最佳选项。

The world uses about a thousand million (百万) tons of water a day. Water is a human right and everyone should have their share. Yet more than 700 million people around the world have trouble getting clean, safe water.

Treating wastewater is a good way to provide fresh water for us. And it also helps the environment by keeping waste out of rivers and oceans. 80% of wastewater around the world is not treated at all, and it is running into oceans. But now we have got the technology to treat and reuse the wastewater.

While 75% of our planet is covered with water, only about 2% is fresh water—that comes from rivers, lakes, ice and snow. The rest, 98% of the water, is in seas and oceans. It is too salty to drink. Then desalination businesses come in. More than 19,000 factories have been built around the world, mostly in coastal countries. They process (加工) more than 92 million tons of water every day. But the technology they use requires a lot of energy.

Scientists are working to create a less costly technology. They want to produce 20 times more clean water and make sure everyone has enough. But for now, the world still faces each day with not having enough water for everyone.

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