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    ( ) Jane can fly kites very . A. good B. well C. better D. much 【查看更多】

     

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    　　Scientists have always wanted to know more about the universe.

    　　Years ago they knew many things about the moon. They knew how big it was and how far away it was from the earth. But they wanted to know more about it. They thought the best way was to send men to the moon.

    　　The moon is about 384,000 kilometers away from the earth. A plane cannot fly to the moon because the air reaches only 240 kilometers away from the earth. But something can fly even when there is no air. That is a rocket(火箭).

    　　How does a rocket fly? There is gas(气体) in the rocket. When the gas is made very hot inside the rocket, it will rush out of the end of the rocket, so it can make the rocket fly up into the sky.

    　　Rockets can fly far out into space. Rockets with men in them have been to the moon. Several rockets without men in them have flown to another planet(行星) much farther away than the moon. One day rockets may be able to go to any place in space.

    根据短文内容，选择正确答案

    1．Scientists have known ________ the moon is.

    [　　]

    A．how long
    B．how heavy
    C．how old
    D．how big

    2．The earth is about 384,000 kilometers away from the ________.

    [　　]

    A．space
    B．universe
    C．sun
    D．moon

    3．A plane cannot fly to the moon because ________.

    [　　]

    A．there is no air 240 kilometers above from the earth

    B．there is no gas in the plane

    C．the plane is not strong enough

    D．the plane must be driven by a man

    4．The hot gas in the rocket is used for ________.

    [　　]

    A．keeping the air in the rocket fresh(清新的)

    B．keeping the men in the rocket warm

    C．making the rocket fly up

    D．cooking food for the men

    5．Several rockets without men in them have flown to ________.

    [　　]

    A．the stars

    B．the satellites of the sun

    C．the sun

    D．another planet of the sun

    查看答案和解析>>

    阅读理解

    　　Scientists have always wanted to know more about the universe (宇宙) . Years ago they knew many things about the moon . They knew how big it was and how far away it was from the earth . but they wanted to know more about it . They thought the best way was to send men to the moon.

    　　The moon is about 384,000 kilometres away from the earth . A plane can't fly to the moon because the air reaches only 240 kilometres away from the earth . But something can fly even when there is no air. That is a rocket . How does a rocket fly? There is gas (气体) in the rocket . When the gas is made very hot inside the rocket, it will rush out of the end of the rocket, so it can make the rocket fly up into the sky .

    　　Rockets can fly far into the space . Rockets with men in them have been to the moon . Several rockets without men in them have flown to another planet (行星) much farther away than the moon . One day rockets may be able to go to any place in space .

    (1) Scientists have known ______ the moon is .

    [　　]

    A．how long
    B．how heavy
    C．how old
    D．how big

    (2) The earth is about 384,000 kilometres away from the ________.

    [　　]

    A．space
    B．universe
    C．sun
    D．moon

    (3) A plane can't fly to the moon because ________.

    [　　]

    A．there is no air above 240 kilometres away from the earth

    B．there is no gas in the plane

    C．the plane is not strong enough

    D．the plane must be driven by a man

    (4) The hot gas in the rocket is used for ________.

    [　　]

    A．keeping the air in the rocket fresh

    B．keeping the men in the rocket warm

    C．making the rocket fly up

    D．cooking food for the men

    (5) Several rockets without men in them have flown to ________.

    [　　]

    A．the stars

    B．the satellites of the sun

    C．the sun

    D．another planet of the sun

    查看答案和解析>>

    阅读理解

    　　Scientists have always wanted to know more about the other worlds in space．They have looked at them through telescopes(望远镜)and in this way they have found out a great deal．They know many facts about the moon．For example, they know how big it is and how far away．But they wanted to know more about it．The only way to find out more was to send men to the moon．Then they would know all about it．

    　　The moon is about 184,000 kilometers away from the earth．An airplane cannot fly to the moon because the air reaches only 240 kilometers．Then there is no air．But there is something that can fly even when there is no air．There is a rocket．

    　　I am sure that you are asking, “How does a rocket fly?”If you want to know, get a balloon and then blow it up, until it is quite big．Do tie up the neck of the balloon, let it go．The balloon will fly off through the air very quickly．The air inside the balloon tries to get out．It rushes out through the neck of the balloon and this pushes the balloon through the air．It does not need wings(翅膀)like a plane．

    　　This is how a rocket works．It is not made of rubber(橡胶)like a balloon, of course．It is made of metal(金属)．The metal must not be heavy but it must be very strong, there is gas inside the rocket, which is made very hot．When it rushes out of the end of the rocket, the rocket is pushed up into the air．

    　　Rockets can fly out into space．Rockets with men inside them have already reached the moon．Several rockets without men inside them have been sent to other worlds much farther away．One day rockets may be able to go anywhere in space．

    (1)

    What is used by scientists to look at other worlds?

    [　　]

    A．

    Telescopes．

    B．

    Glasses．

    C．

    Mirrors．

    D．

    TVs．

    (2)

    How far is the moon from the earth?

    [　　]

    A．

    184,000 meters．

    B．

    240 meters．

    C．

    184,000 kilometers．

    D．

    18,400 kilometers．

    (3)

    What is sent to the moon even there is no air there?

    [　　]

    A．

    Planes．

    B．

    Trains．

    C．

    Rockets．

    D．

    Ships．

    (4)

    A balloon is made of ________ while a rocket is made of ________．

    [　　]

    A．

    metal; rubber

    B．

    rubber; rubber

    C．

    plastic; metal

    D．

    rubber; metal

    (5)

    The way of how a rocket works is ________ that of a balloon．

    [　　]

    A．

    different from

    B．

    just like

    C．

    not as good as

    D．

    as good as

    查看答案和解析>>

    完形填空

    　　Scientists have always wanted to know more about the universe．

    　　Years ago they knew 　　1　　 things about the moon．They knew how big it is and how 　　2　　 away it is from the earth．But they wanted to know more about it．They thought the best way was to send men to the moon．

    　　The moon is about 384,000 kilometers away from the earth．A 　　3　　 can not fly to the moon 　　4　　 the air 　　5　　 only 240 kilometers away from the earth．But something can fly even when there is no 　　6　　．That is a 　　7　　．

    　　How does a rocket fly?There is gas in the rocket．When the gas is made very hot inside the rocket, it will rush out of the end of the rocket, so it can 　　8　　 the rocket fly up into the sky．

    　　Rockets can fly far out into 　　9　　．Rockets with men in them have been to the moon．Several rockets without men in them have flown to another planet much 　　10　　 away than the moon．One day rockets may be able to go to any place in space．

    (1)
    [　　]

    A．

    much

    B．

    a little

    C．

    a few

    D．

    no

    (2)
    [　　]

    A．

    long

    B．

    far

    C．

    near

    D．

    different

    (3)
    [　　]

    A．

    bird

    B．

    rocket

    C．

    plane

    D．

    satellite

    (4)
    [　　]

    A．

    so

    B．

    because

    C．

    for

    D．

    though

    (5)
    [　　]

    A．

    gets to

    B．

    arrives at

    C．

    comes to

    D．

    reaches

    (6)
    [　　]

    A．

    water

    B．

    air

    C．

    wind

    D．

    sky

    (7)
    [　　]

    A．

    machine

    B．

    rocket

    C．

    plane

    D．

    satellite

    (8)
    [　　]

    A．

    get

    B．

    make

    C．

    take

    D．

    allow

    (9)
    [　　]

    A．

    sky

    B．

    earth

    C．

    space

    D．

    universe

    (10)
    [　　]

    A．

    farther

    B．

    far

    C．

    bigger

    D．

    big

    查看答案和解析>>

    阅读理解

    　　Scientists have always wanted to know more about the universe (宇宙) . Years ago they knew many things about the moon . They knew how big it was and how far away it was from the earth . but they wanted to know more about it . They thought the best way was to send men to the moon.

    　　The moon is about 384,000 kilometres away from the earth . A plane can't fly to the moon because the air reaches only 240 kilometres away from the earth . But something can fly even when there is no air. That is a rocket . How does a rocket fly? There is gas (气体) in the rocket . When the gas is made very hot inside the rocket, it will rush out of the end of the rocket, so it can make the rocket fly up into the sky .

    　　Rockets can fly far into the space . Rockets with men in them have been to the moon . Several rockets without men in them have flown to another planet (行星) much farther away than the moon . One day rockets may be able to go to any place in space .

    1．Scientists have known ______ the moon is .

    [　　]

    A．how long
    B．how heavy
    C．how old
    D．how big

    2．The earth is about 384,000 kilometres away from the ________.

    [　　]

    A．space
    B．universe
    C．sun
    D．moon

    3．A plane can't fly to the moon because ________.

    [　　]

    A．there is no air above 240 kilometres away from the earth

    B．there is no gas in the plane

    C．the plane is not strong enough

    D．the plane must be driven by a man

    4．The hot gas in the rocket is used for ________.

    [　　]

    A．keeping the air in the rocket fresh

    B．keeping the men in the rocket warm

    C．making the rocket fly up

    D．cooking food for the men

    5．Several rockets without men in them have flown to ________.

    [　　]

    A．the stars

    B．the satellites of the sun

    C．the sun

    D．another planet of the sun

    查看答案和解析>>


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