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    ( )If you weigh 540 pounds on the earth. you would only be able to weigh pounds on the moon. A.270 B.180 C. 90 D.60 【查看更多】

     

    题目列表(包括答案和解析)

    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 yourself, you will know how much gravity
    is pulling you.
          Since there is gravity, water runs down hills. When you throw a ball into the air, it falls back down.
    Because of gravity, you do not 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. Then the spaceship will go so fast that it can escape  (逃出) the earth's
    gravity and carry you into space.
    1. 判断正（T） 误（F）。
    (   )1.The weight of the earth is called gravity.
    2. A good high-jumper can jump three meters off the ground, can't he?
        ____________________________________________________
    3. If the earth's gravity becomes smaller, will you become heavier or lighter? 
        ____________________________________________________
    4. Why can a spaceship escape the earth's gravity?
        ____________________________________________________
    5. Put the underlined sentence in the passage into Chinese.
         ____________________________________________________

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    完形填空。
         Even if you are a good high-jumper, you can jump only about seven __1__ off the ground. You cannot  jump any higher because the earth __2__ you hard. The pull of the earth is__3__  gravity (引力).
         You can easily __4__ out the pull of the earth. If you weigh __5__  , you will know how__6__ gravity
     is pulling you.
         Since there is gravity, water runs downhill. when you__7_ a ball into the air, it falls back down.
     Because of gravity, you do not fall off the earth __8__  it turns around.
         Then, can you get __9__  from the earth and go far out into space?
         Now you can do it, because spaceships have been invented. The spaceship will go fast that it can get
      rid of (除掉) the earth's gravity and __10__ you into space.
    (     ) 1. A. kilometer
    (     ) 2. A. pulls    
    (     ) 3. A. said      
    (     ) 4. A. find      
    (     ) 5. A. myself    
    (     ) 6. A. much      
    (     ) 7. A. fly      
    (     ) 8. A. as        
    (     ) 9. A. off      
    (     ) 10. A. get          		 B. foot        
    B. push        
    B. called      
    B. look        
    B. yourselves  
    B. many        
    B. throw        
    B. and          
    B. away        
    B. bring            		 C. feet    
    C. makes    
    C. told    
    C. saw      
    C. you      
    C. heavy    
    C. get      
    C. because  
    C. lost    
    C. carry        		 D. kilometers  
    D. hits        
    D. spoken      
    D. watch      
    D. yourself    
    D. long        
    D. make        
    D. or          
    D. left        
    D. throw      

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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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    根据短文内容选词填空。(Choose the right words to fill in the blanks．)

    　　What's the life on Pluto like? Is it quite 　　1　　 from the life on the earth?

    　　If you visit on Pluto, you'd have to live 248 earth years to celebrate your first birthday in Pluto years．It 　　2　　 Pluto much longer to make one circle around the sun．One Pluto year is the 　　3　　 as 248 earth years．

    　　If you weigh 45 kilograms on the earth, you would weigh only 3.6 kilograms on Pluto! Pluto is much 　　4　　 than the earth．Gravity(重力)on Pluto is only 8 percent of 　　5　　 on the earth．

    　　Remember to bring plenty of clothes if you visit the star．Pluto is cold．　　6　　 it is far away from the sun, the temperature on 　　7　　 is about 200 degrees centigrade below zero．It gets even colder as it moves 　　8　　 from the sun in its orbit(轨道)．From Pluto, the sun looks 　　9　　 a dot in the sky, and it is the brightest star you can see．The light from the sun is 　　10　　 bright on Pluto as the light from the full moon on the earth．

    1．________　2．________　3．________　4．________　5．________

    6．________　7．________　8．________　9．________　10．________

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    判断下列各句的对(T)错(F)。

    　　The Mid-autumn Festival of this year falls on Tuesday, August 28(the 15th day of the eighth lunar(农历)month)．It is one of the three big traditional(传统的)Chinese festivals．The other two are the Spring Festival and the Dragon-Boat Festival(龙舟节)．

    　　In China, there are many beautiful stories about the moon．What is the moon like in the eyes of the Westerners(西方人)? Please read the following：

    　　Have you ever seen the man in the moon? If you look at the moon on some nights, you can see the face of the man in the moon．Some people say that they can see an old man carrying a stick．Others see a girl reading a book．These pictures are made by the mountains and plains(平原)of the moon．

    　　Long ago, people in England used to tell their children that the moon was made of green cheese．Everyone knows that this is not true．The moon is a large round rock(岩石)．There are no trees or plants on the moon．There are no rivers or seas．There are no living things．It never rains on the moon, and everything is covered with dry, white dust(灰尘)．Not even can a sound be heard on it．

    　　When the sun shines on it, the moon is very hot．In the shade(阴影), however, it is as cold as ice．The moon is much smaller than the earth．If you went to the moon, you would weigh(称重)six times less than now．Even a fat man would be able to jump high off the ground．

    (1)

    The Chinese people like the Mid-autumn Festival．

    (　　)

    (2)

    There are mountains and plains on the moon．

    (　　)

    (3)

    Trees are not mentioned(提到)in the passage(短文)．

    (　　)

    (4)

    If you weigh 120 kilograms on the earth, you will weigh 20 kilograms on the moon．

    (　　)

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