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    Things from Earth are hard to find 【查看更多】

     

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    (翻译) things from Earth are hard to find

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    阅读理解

    　　Even if you are a good high-jumper, you can jump only about seven feet off the ground. You cannot jump any higher because the earth pulls you hard. The pull of the earth is called gravity.

    　　You can easily find out the pull of the earth. If you weigh (称体重) yourself, you will know how much gravity is pulling you.

    　　Since there is gravity, water runs downhill. When you throw a ball into the air, it falls back down. Because of gravity you don't fall off the earth as it whirls (旋转) around.

    　　Then, can we get away from the earth and go far out into space? Now you can do it, because spaceships have been invented. The spaceship will go so fast that it can escape (逃离)the earth's gravity and carry you into space.

    (1) In this passage (文章), the word “gravity” means

    [　　]

    A. the pull of everything

    B. the force (力) which attracts (吸引) the earth towards us

    C. the force of attraction among things

    D. the force which attracts things towards the center of the earth

    (2) When you slip (滑倒)on something, you

    [　　]

    A. always fall down to the ground

    B. sometimes fall down to the ground

    C. go up into the air

    D. often fall off the earth

    (3) Gravity is so strong that ________

    [　　]

    A. it can't make you throw a ball into the air

    B. it can keep everything on the earth

    C. you can jump at least seven feet high

    D. you can't go up into the air by spaceship

    (4) Because of “gravity ”,________

    [　　]

    A. water flows (流) everywhere

    B. we can go everywhere by ship

    C. water flows downwards on the earth

    D. water flows at the foot of hills

    (5) We can get away from the earth by spaceship because

    [　　]

    A. the spaceship goes very fast

    B. the earth has no gravity to the spaceship

    C. the spaceship has a strange energy (能量)

    D. the spaceship can go higher than any other thing on the earth

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    阅读理解

    　　Even if you are a good high-jumper, you can jump only about seven feet off the ground. You cannot jump any higher because the earth pulls you hard. The pull of the earth is called gravity.

    　　You can easily find out the pull of the earth. If you weigh (称体重) yourself, you will know how much gravity is pulling you.

    　　Since there is gravity, water runs downhill. When you throw a ball into the air, it falls back down. Because of gravity you don't fall off the earth as it whirls (旋转) around.

    　　Then, can we get away from the earth and go far out into space? Now you can do it, because spaceships have been invented. The spaceship will go so fast that it can escape (逃离)the earth's gravity and carry you into space.

    (1) In this passage (文章), the word “gravity” means

    [　　]

    A. the pull of everything

    B. the force (力) which attracts (吸引) the earth towards us

    C. the force of attraction among things

    D. the force which attracts things towards the center of the earth

    (2) When you slip (滑倒)on something, you

    [　　]

    A. always fall down to the ground

    B. sometimes fall down to the ground

    C. go up into the air

    D. often fall off the earth

    (3) Gravity is so strong that ________

    [　　]

    A. it can't make you throw a ball into the air

    B. it can keep everything on the earth

    C. you can jump at least seven feet high

    D. you can't go up into the air by spaceship

    (4) Because of “gravity ”,________

    [　　]

    A. water flows (流) everywhere

    B. we can go everywhere by ship

    C. water flows downwards on the earth

    D. water flows at the foot of hills

    (5) We can get away from the earth by spaceship because

    [　　]

    A. the spaceship goes very fast

    B. the earth has no gravity to the spaceship

    C. the spaceship has a strange energy (能量)

    D. the spaceship can go higher than any other thing on the earth

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    阅读理解。
         During the cold winter days you may find it hard to wake up in the morning. It's warm and cozy
    (舒适的) in your bed.
         In winter, many animals like to sleep, too. But their sleeps can be very long and deep. This kind of
    sleep is called hibernation (冬眠). During this kind of sleep, their temperatures go down, and hearts beat
    (跳动) slowly. They take very small breaths.
         Animals can hibernate for part or all of the winter. It's hard for them to find things to eat. When they
    go to sleep, they don't need much food.
         Bears, hedgehogs (刺猬) and chipmunks (花栗鼠) go to sleep in their homes. Frogs and snakes
    hibernate, too. Frogs move into the earth under water to keep themselves warm.
         Before they go to sleep, they eat a lot to get fat (脂肪). Some also keep food in their homes to eat later.
    Bears are the biggest animals that hibernate. They often sleep in caves (山洞).
         Bears must eat a lot of things like nuts before going to sleep for a long time. They eat as much as 300
    apples (that's the same as 60 hamburgers) each day for many weeks. They can eat for 20 hours in a day!
         Bears can go into a very deep sleep. It can last from three months to half a year. During that time they
    do not eat, drink or go to the toilet. A mother bear can give birth to babies during her hibernation.
         Other animals sleep less. Sometimes they wake up to eat, or take a walk. Then they go to sleep again.
    根据短文内容判断正(T)误(F)：
    (     )1. Hibernation is a the long and deep sleep of animals in winter.
    (     )2. During hibernation, animals don't breathe at all.
    (     )3. Bears eat lots of food before they hibernate in winter.
    (     )4. Bears don't go to the toilet during their hibernation.
    (     )5. Frogs hibernate in the Earth under water.
    (     )6. Mother bears can't give birth to babies during hibernation.
    (     )7. We can infer that fat is an important food for animals during hibernation.
    (     )8. Bears, hedgehogs, chipmunks, pigs and frogs hibernate.

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    完形填空。
         Oil is so important that it is sometimes called "black gold". Almost half our   1   comes from oil. We use
    it to run our cars and factories and to   2   our homes, offices and schools. Many everyday things are made
    from oil. Your shirt may have oil in the material. The soap you   3   your hands with might also be made from
    oil. Children's plastic toys are made from oil.
         Oil is   4   to find, because it is trapped (陷入) deep under the earth. Today, however, we have many   5  
     to find oil. One tool measures (测量) the pull of gravity (吸力). Places where gravity is weaker are more
    likely (很可能) to have oil.   6   tool measures sound waves (波). Sound waves   7   through different kinds
    of rocks at different   8   . We can use them to find the reeks that have oil in them. 
         We need   9   oil. and we are using up the oil wells (井) we know about.  10  we must find new ways of
    looking for this "black gold". Can you do anything for it?
    (     )1. A. courage    
    (     )2. A. design    
    (     )3. A. wash       
    (     )4. A. easy       
    (     )5. A. ways         
    (     )6. A. One       
    (     )7. A. keep        
    (     )8. A. speeds      
    (     )9. A. little      
    (     )10. A. Or             		B. energy       
    B. protect   
    B. injure        
    B. important      
    B. things      
    B. Other         
    B. include      
    B. places       
    B. a lot of   
    B. But             		C. things          
    C. heat          
    C. save           
    C. interesting    
    C. news         
    C. Another        
    C. control        
    C. directions       
    C. a little     
    C. So               		D. business     
    D. make         
    D. touch        
    D. hard         
    D. varieties      
    D. The other                        
    D. travel        
    D. situations    
    D. a few         
    D. So that    

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