When you look up into the sky at night, have you ever felt that your eyes are playing tricks on (捉弄) you?...

题型：阅读选择题类：常考题难易度：普通

     When you look up into the sky at night, have you ever felt that your eyes are playing tricks on (捉弄) you? It seems that the stars are moving all the time.
      Actually, there is nothing wrong with your eyes. This twinkling effect is called scintillation (交光). Scintillation happens because of air movements in the earth's atmosphere (大气). Light is “bent (弯曲的)” when it travels through different parts of the earth's atmosphere. As the air in the earth's atmosphere is moving all the time, the light from the stars looks as if it is moving too.
    The same thing also happens to things on the ground. On a very hot and shiny day, if you look at the road, the image in the distance is not clear and things move slightly. You can also see the same effect if you drop a rock into water. The rock appears a little unclear under the moving water.
      This twinkling effect causes a lot of problems for astronomers (天文学家) since they cannot observe the stars clearly. A telescope (望远镜) was sent into space so that the air movements in the atmosphere could be avoided (避免). It took a long time to build the space telescope but finally in 1990, a huge space telescope called the Hubble Space Telescope was successfully sent into space. Since then, astronomers have many important observations that have helped people understand space better.
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（1）、What happens to the light from the stars we see when the air in the earth's atmosphere is moving?

A、It looks even brighter. B、It looks as if it is bent. C、It looks as if it is moving D、It looks like drops of rain.

（2）、Scintillation also happens on 　　　　 according to the passage.

A、rainy days B、shiny days C、cloudy days D、windy days

（3）、What can you see when you drop a rock into the water?

A、The rock gets broken B、The rock becomes unclear. C、The water becomes much polluted. D、The water does not move anymore.

（4）、The underlined word “observe” means “　　　　”.

A、watch B、listen C、draw D、explain

（5）、Why is scintillation a problem for astronomers?

A、The stars never stay still. B、It makes the stars too dark to see. C、It makes astronomers feel too hot to work. D、Astronomers cannot observe the stars clearly.

举一反三

Our spiritual intelligence quotient, SQ (精神智商)helps us understand ourselves and live fuller, happier lives.
　 While we're all born with SQ, most of us even don't know that we have it. Luckily, you don't have to sign up for classes to learn how to enhance(加强) your SQ. Here are some simple steps that can lead you to this new level of understanding:
　 Sit Quietly. The step of developing SQ begins in solitude （独处） and silence. To tune in to its whisper, you have to keep away from your busy, noisy, complicated life and make yourself do nothing at all. At home, for example, shut the door of your bedroom, take a few deep breaths and let them out very, very slowly.
　 Step Outside. For many people, nature makes their spirit free. Go outside to watch a beautiful sunset. Follow the flight of a bird; watch clouds floating overhead.
　 Find An Activity You Enjoy. It's important to find a hobby that helps you tune in to your spirit. Garden, walk or jog, arrange flowers, listen to music that touches your soul.
　 Ask Questions Of Yourself. Some people use their thoughtful time to focus on scriptures (经文). Others ask open-ended (无确定答案的) questions, such as “What am I feeling? What are my choices?”But don't expect an answer to arrive through some super-natural form of e-mail. Later that day you'll suddenly find yourself thinking about a problem from a perspective (角度) you never considered before.
　 Trust Your Spirit. While most of us rely on gut feelings (直觉) to warn us of danger, SQ usually nudges （渐渐推动） us, not away from, but toward some action that will lead to a greater good.　　

    Many places in the world need more fresh water. Every country is trying to find ways to turn salt water into fresh. Why aren't there many factories like the Symi factory?
    In some places the sun is not hot enough. Or it does not shine every day.
    In such places other ways of heating sea water can be used. These ways cost more money, but they work faster than the sun. By boiling sea water with high heat a lot of fresh water can be made quickly.But heating is not the only way to get fresh water from salt water. Other ways are tried.
    One way is freezing. The fresh part of salt water freezes first. To get fresh water, the bits of ice are taken out.
    Which way is the best? The one that gives the most water for the least money. It may be a different way for each place.
Symi's way seems very good for small, hot places. It does not make much water at a time. But the factory is easy to build and costs little. That is why people in many dry places talk about Symi.

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After a long day's study at school, you are very tired. So after school you go home to relax. When you get home, a robot greets you. He's happy to see you and helps you take your school things to your room. He listens to you talk about your school life and tells you a new joke. And he tells you to call your cousin and to say happy birthday. And then he helps you with your homework.

This is your future, and the robot's name is NAO. NAO has a small body, big eyes and a large head. He can walk and dance. He listens and talks, and he even learns and thinks for himself. His creators(创造者) predict that the robot will be in people's homes before 2040.

This $16,000 robot knows who you are. NAO can even express emotions(表达情感). He is a self-guided robot. A self-guided robot can sense(感觉), think and act. Other robots might do two out of the three. For example, a robot might sense things using cameras and think using computers, but with no arms, he can't act. Another robot can move and sense things, but he can't think for himself. These aren't self-guided robots. But NAO can do them all.

根据表格内容，选择最佳答案。

Robots seem to be getting cleverer and cleverer. Here are four examples.

Budgee

·He was created by Five Elements Roboties.

·With two wheels and a little basket, he can carry things for you while you're at the shops.

Paro

·He was made by Takanori Shibata.

·He is used on patients in hospitals.

·He can learn a name and even show feelings such as surprise, happiness and sadness.

Rover

·He was created by a team at Sydney University.

·He is used to make cows move together from a field to a diary（牛奶场）.

Simon

·He was developed by the Georgia Institute of Technology.

·He can clean up offices.

·In tests, he could tell whether someone was paying attention to him or not.

阅读下面短文，从短文后所给的A、B、C三个选项中选出能填入相应空白处的最佳选项。

As everyone knows, animals are our friends. Of all the animals, dogs are friendly to 1.

Dogs are always staying 2 human beings. They are in different colours. There are many different 3 of dogs. Hunting dogs can 4people get more prey(猎物). The seeing-eye dogs can help 5people a lot. The police dogs can help the police.

Today it is 6 to imagine the life without dogs. Maybe everyone is happy to see dog. Dogs are good at7 and smelling. Some dogs can find the people who are trapped(困) 8 the broken house. Some dogs can help take care of the houses. 9someone strange comes close to the house, they will bark to frighten him. Even some dogs can help look after kids when their 10 are not at home.

In a word, dogs are our best friends among all animals.

阅读理解

We all cry for water when we are thirsty. But do you know, in very hot, dry weather, plants also make very low sounds as if they are crying for help?

You see, in a plant's stem there are several hundred "water pipes" that bring water from soil all the way up to the leaves. When the ground turns dry, it becomes harder and harder for plants to do this.

In very hot days, plants have to get any water that they can get.

Scientists Robot Winter has found out that when plants can get no water, their "water pipes" snap(发出声音). When that happens, the whole plant vibrates(颤动) a little.

Robot knows that healthy, well-watered plants are quiet. He also knows that dry plants are many insects' favorites and they often attack(袭击) them. How do the insects know which are healthy plants and which are not? Robot thinks that the insects may hear the plants "crying" and they may come to kill them.

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