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  • 题型:阅读选择 题类:真题 难易度:普通

    根据表格内容,选择正确答案。

       Have you ever rubbed your hands together when they get cold? Why do we do that? We do that for friction. Friction happens when two things that aren't very smooth rub together to make heat energy. The faster you rub two things together, the more friction (and heat) you can make. Let's discover friction!

    WHAT YOU'LL NEED:
    ● Soap           ● Water          ● Your hands!
    WHAT TO DO:
    1. Make sure your hands are dry.
    2. Rub your hands together until you feel the heat of your hands.
    3. Now, use soap and water to get your hands very slippery (滑的).
    4. Try to make friction happen while your hands are slippery.
    5. Please write down what has happened.
    LET'S TALK!
        Friction is an energy that happens when two things rub together. When friction happens, it makes heat! When your hands are slippery, they won't make very much friction and your hands won't get so hot.
    DID YOU KNOW?
    1. Friction happens when you stop your fast running bike.
    2. Ancient people made fires by rubbing two pieces of wood together. Friction happened though they didn't know it.
            ?       
        Friction is everywhere. Have you ever noticed situations where friction is happening? If not, ask your parents to take you out in a car. If it is not too hot, touch the tires (轮胎) of the car before and after a short drive to see how much warmer they get from friction.


    (1)You'd better make your hands                 to get heat when you rub them.

    A . slippery B . dry C . wet D . smooth
    【答案】
    (2)What does the word “friction” in this text mean in Chinese?

    A . 摩擦 B . 冷却 C . 膨胀 D . 震动
    【答案】
    (3)                        is NOT an example of friction.

    A . Bike riding B . Car driving C . Hands rubbing D . Friction discovering
    【答案】
    (4)What's the last column (栏目)?

    A . THINK IT OVER! B . WHAT HAPPENED? C . EVERYDAY ACTION: D . WORK WITH PARENTS!
    【答案】
    (5)This text is most probably                         .

    A . a science report B . a car advertisement C . a rubbing introduction D . a chemistry programme
    【答案】
    【考点】
    【解析】
      

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    组卷次数:21次 +选题

  • 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.  

    根据短文内容,选择正确的选项。
       The world itself is becoming much smaller by using modern traffic and modern communication means(交流方式). Life today is much easier than it was hundreds of years ago, but it has brought new problems. One of the biggest is pollution. To pollute means to make things dirty. Pollution comes in many ways. We see it, smell it, drink it and even hear it.
       Man has been polluting the earth. The more people, the more pollution. Many years ago, the problem was not so serious because there were not so many people. When the land was used up or the river was dirty in a place, men moved to another place. But this is no longer true. Man is now slowly polluting the whole world.
       Air pollution is still the most serious. It's bad to all living things in the world, but it is not only one kind of pollution. Water pollution kills fish and pollutes drinking water. Noise pollution makes us become angry more easily.
        Many countries are making rules to fight against pollution. They stop the people from burning coal in houses and factories in the city, and from blowing dirty smoke into the air.
       The pollution of SO2 is now the most dangerous problem of air pollution. It is mostly caused by heavy traffic. It is certain that if there are fewer people driving, there will be less air pollution.
       The earth is our home. We must take care of it. That means keeping the land, water and air clean. And we must try to control the growth of population at the same time.

    根据短文理解,选择正确答案。

        Imagine the situation. You are driving along a desert or on a mountain. You have no idea where you are. You passed the last house two hours ago. Then your car breaks down. It is night and it is cold. You have no mobile phone. What do you do? Well, next time take a GPS with you. This invention may be able to help you. It is a device(装置) which uses satellites (卫星) to find the user's position(位置). It can find your position to within 20 metres. A GPS cannot start your car, but at least you will know where you are.

        GPS, which means Global Positioning System, is a small radio receiver. It looks like a mobile phone. You can hold it in your hand, or put in your pocket. It is sometimes put into a watch or a telephone. We also find GPS devices in cars, planes, or boats. Some of these devices have electronic maps, so you know where you are. For example, in a city they can tell you the name of the street.

        There are three parts to the Global Positioning System. The first part is the receiver. You can hold it in your hand, or have it fixed into your car, plane, etc. The second part is a group of satellites orbiting the Earth. The receiver contacts at least four of the satellites and calculates(计算) its position. The third part of the system is a network of ground stations. They are all over the world. They control the satellites and make sure they are working well.

        Some people think that in the future the GPS will be as common as the mobile. They are becoming cheaper and more and more accurate(精确的). There are also new uses for the GPS. Perhaps they will become like watches. Everyone will have one and you will never be lost again.

    阅读理解,根据短文内容,选择最佳选项。

        Is there intelligent(有智力的) life on other planets(行星)? For years, scientists said "No." or "We don't know." But today this is changing. Seth Shostak and Alexandra Barnett are astronomers (天文学家). They believe intelligent life exists somewhere in the universe. They also think we will soon contact these beings(人;生物).

        Why do Shostak and Barnett think intelligent life exists on other planets? The first reason is time. Scientists believe the universe is about 12 billion years old. "This is long enough for other planets to have intelligent life," say Shostak and Barnett. The second reason is size——the universe is huge. "Tools like the Hubble Telescope (哈勃望远镜) have shown that there are at least 100 billion galaxies (银河系) ," says Shostak. "And our galaxy, the Milky Way, has at least 100 billion stars. Some planets going around these stars might be similar to Earth. "

        In the past, it was hard to look for signs of intelligent life in the universe. But now, powerful telescopes (高倍望远镜) allow scientists to discover smaller planets--the size of Mars or Earth--in other solar systems (太阳系).These planets might have intelligent life.

        Have beings from space already visited Earth? "Probably not," says Shostak. "It's a long way away. However, intelligent beings may contact us in other way, such as radio signals(信号). "In fact, they may be trying to communicate with us now, but we don't have the right tools to receive their messages. However, this is changing. By 2025, we could make contact with other life forms in our universe and we might help each other.

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