A computer can get very hot when it works on a lot of programs. It can cost a lot to cool the computer. So some scientists want to know what would happen if the heat from the computer could be used.

    Large Internet companies such as Google and Microsoft have thousands of computers. As these computers deal with information， they produce lots of heat， so they need huge cooling systems. These systems send the heat into the air.

    A company in Holland thinks paying to make the computers work and then paying again to cool them are a waste of energy. So the company developed a special device—the e-Radiator.

    Boaz Leupe， head of the company， says that e-Radiator works as a heating system and saves money. He explains that the energy is used twice—once to heat the home and once to cool the computer and that the users don't have to pay to cool their computers.

    Five homeowners in Holland are testing the heating system in their homes.

    “We pay for the computer using， so， in that way， homeowners get heating for free.” Boaz says.

    Jan Visser is one of the homeowners. “If you use the computer more， the e-Radiator producers more heat，” he says， “It cannot provide enough heat if you don't use your computer often.” But he is ready to try it. It's a great help for his family.

    The company says e-Radiators produce heat temperatures of up to 55℃. It says the system could save its users about $440 a year.

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    Are you nervous? Maybe you should sit in a blue room. Are you always cold? Maybe you should sit in a room painted in a "warm colour" such as soft orange. Are you often sad? Maybe you should sit in a yellow room. Some researchers believe that colour has the power to influence our feelings. They believe that colours affect(影响)everyone in the same way.

    One study was in a workplace. The researchers painted heavy boxes white and light boxes black. They want to see how colour affected the workers' feelings. Which boxes do you think were more difficult to lift? The heavy white ones? No. The white boxes were heavier but they looked light. The researchers think that this is because light colours seem light.

    Another study was at school. Researchers at the University of Alberta in Edmonton, Canada, studied children with behaviour problems in their classroom. When the walls were brown and yellow, the children's heart rate went up and they were over-active. However, when the walls were dark blue, the children's heart rate was slower and the children were much calmer. If this is true, we can think carefully about the colours around them--not just in our homes, but also in offices, in schools, in hospitals, in gyms, in museums, in restaurants and even in prisons.

根据短文内容，选择最佳的答案。

    Some people claim they" never forget a face". But what does that saying mean? Is there really no limit to the number of faces a person can remember? A new study at the University of York in England has found that, on average, people can remember as many as 5,000 faces.

    The study is the first time that scientists have been able to put a number to the abilities of humans to recognize faces. The research team tested people on how many faces they could remember from their personal lives and in the media. They also tested them to see how many famous faces they recognized. Rob Jenkins works in the psychology department at the University of York. He said the researchers' study centered on the number of faces people actually know. He said the researchers were not able to discover whether there is a limit on how many faces the brain can handle.

    In the study, people spent one hour writing down as many faces from their personal lives as possible. At first, they found it easy to come up with many faces. But by the end of the hour, they found it harder to think of new ones. Their change in speed let the researchers estimate when they would have run out of faces completely.

    The results showed that these people knew between 1,000 and 10,000 faces. Jenkins explained that some people may have a natural ability for remembering faces." There are differences in how much attention people pay to faces and how well they process the information," he said. Jenkins also said it could be because of different social environments. Some people may have grown up in more populated places. Therefore, they may have had more social contact throughout their lives.

    The people in the study included 25 men and women between 18 and 61 years old. Researchers think age may be an interesting area for further research. "It would be interesting to see whether there is a peak age for the number of faces we know", Jenkins said. He said it is possible that we gather more faces throughout our lifetime. But, he added, there also may be an age at which we start to find it harder to remember all of those faces.

    The study suggests our facial recognition abilities enable us to deal with the many different faces we see on the screens, as well as those we know, like family and friends. Today, facial recognition technology is used in many ways, including by law enforcement agencies to prevent crime and violence. Governments use it to keep secret areas secure and, in extreme cases, control populations. .Even Facebook uses facial recognition. For example, when you "tag" or name a friend, Facebook technology may recognize the person's face from a different picture you had shared before.

    Students learn their lessons in class. In class, teachers teach them. Students sit in the classroom listening to the teacher. Is this the only way for students to learn? Of course not. There is another way to learn. That is, students can teach themselves. For example, if you cannot remember anything when you are doing your homework, you can look through（浏览） your book to find the answer. This is a way to teach yourself. And it's not a difficult thing. We can do it at any place and at any time.

    How to teach yourself? The first thing you must do is to read. Read something interesting. The second is that you must ask yourself questions. Many clever students often do this. The questions are about something you don't understand or you want to know more about. You can write down these questions. The third is to answer the questions yourself by thinking hard, by reading the texts or other books, and sometimes by asking other people. These are the ways of teaching yourself. And if you do these things for a long time, you can succeed（成功）in your study.

In the year 2070，most of you will be more than 50 years old.The good news is that travel might become smarter by that time.To catch people's eyes and increase the numbers of passengers，European airline （航空公司）（发布）easyJet 2070：The Future Travel Report.Let's take a look at some mind—blowing ideas.

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Paper passport will be a thing of the past.You will use"heartbeat passport" instead.According to experts，the machine will count how many times the heart beats in a minute，then it will tell who you are.It doesn't work hard because everyone's heart beats differently.

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The seats on the plane are only one size，which can't make passengers satisfied.But in the future，you'll be able to book a seat according to your body type.The seat might even be able to cool or warm you if you want.There will also be no more screens on the back of the seats.A special light from the seat could show the latest movie s straight in front of your eyes.

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If you like to visit great places of interest，the AR glasses will help you enjoy the journey.By wearing the AR glasses，you can see what happened at a historic place（战役）.You may even be able to sit among the cheering people at the first Olympic Games.

Are you looking forward to having those changes in the year 2070？What other changes do you think about during the flight？