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    ( ) A. F B. S C. T D. X 【查看更多】

     

    题目列表(包括答案和解析)

    补全对话

    (Xiao Ming----X   Father---F)

    X: _______1______. Something is wrong with my watch.

    F: Don’t worry. ____2_____

    X: Here you are.

    F: Do you have a knife?

    X: Yes, ___3____. Where is it?

    F: Oh, there!

    X: Yes, there it is. ____4_____.

    F: Xiao Ming, you must look after your things. Now your watch is OK.

    X: Thank you, Dad.

    F: ___5____.

    A. That’s all right.

    B. Here you are.

    C. Dad, could you help me?

    D. But I can’t find it.

    E: Let me have a look, please.

     

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    阅读理解。
        David's got a text message from his friend Sam. Can you understand it?
        7,15      20,15      20,8,5      16,1,18,11
        This message was in code (密码, 代码). How many letters are there in the English alphabet?
    Twenty-six. So can you read it now?
    A   B   C   D  E   F   G  H   I    J  K L M N O P Q R S T U ...
    1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 ...
        David decided to use a different code in his answer to Sam. This time, he was putting A instead of B,
    B instead of C, and so on. His message to Sam shown on the right was very short. Can you understand?
    A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
    B C D E F G H I J K L M N O P Q R S T U V W X Y Z A
        Sam guessed David's code, and he replied: ZESDQ, RBGNNK. When David's little sister saw the message,
    she felt puzzled. She couldn't read it at all. But David was very happy that his sister couldn't read his message!
         Lots of people use codes to send secret messages. In a war, secrets are very important so soldiers often
    send each other messages in code. Nowadays, we can use computers to make and break difficult codes. Even
    before computers, people invented other machines to do this. 
        Here's a famous machine that Germans used in the Second World War (1941-1945). It's called the Enigma
    Machine. The machines were very big, heavy and expensive. Every day they changed the codes automatically,
    and this made it almost impossible for anyone to break the codes. The person sending a message had one
    machine, and the person receiving the message had another.  
    1．Sam asked David to go to the ______.
    [     ]
    A．park
    B．house
    C．museum
    D．zoo
    2．Sam told David to meet him ______.
    [     ]
    A．before breakfast
    B．after school
    C．after dinner
    D．before school
    3．Codes are used to keep something ______.
    [     ]
    A．new
    B．old
    C．secret
    D．known
    4．People will never know the meaning if they can't ______ the code.
    [     ]
    A．break
    B．make
    C．change
    D．write
    5．The best title of this passage is           .
    [     ]
    A．English Letters
    B．Codes
    C．Messages
    D．Machines

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    What do you do if you're in trouble on a lonely island? Surely you need to find a way to get in touch with the outside world. Your best chance of doing this is to draw the attention of a passing plane.
    Body signals (信号)
    Pilots from different countries understand body signals if they have the correct training, When you wave your arms up and down in a straight line, it means, "yes". When you point downwards and swing your arm from side to side, it means "no". If you want the pilot to know that it's safe to land, push your hands out in front of you and bend (弯曲) your knees. If you want to say that it's not safe to land, put your arms in the air and move them to one side.
    Smoke signals
    The smoke from a fire can be seen from far away, so it’s a good way to draw attention. If the weather is dry, it isn’t hard to start a fire. Remember, however, that fires can be very dangerous if they get out of control. Never light a tire unless you're sure that it can’t spread. If the ground is dark, light smoke can be seen more easily. Green grass and leaves produce light smoke.
    Ground-to-air signals
    It's a good idea lo build some signals, too. Use large pieces of wood to make the symbols (标记). If you can't find any wood, use earth. Some useful symbols are:
    F "I need food and water"
    II "I need medicine."
    I "I am badly hurt."
    X "I am unable lo move from here."
    Pilots' replies
    If the pilot lowers the plane's wings from side to side, this means: "message received and understood" (At night, the pilot flashes the plane's green lights.) If the pilot flies the plane in a clockwise circle, this means "message received hut not understood" (At night, the: pilot flashes the plants red lights.)
    However, there is no signal which means "message not received. Why not'?
    【小题1】How many signals can we use to draw the attention of the passing plane if you're in trouble?

    A．Three.B．FourC．FiveD．Six
    【小题2】Which picture means "it's not safe to land"?

    【小题3】What can we learn from the passage?
    A. Swinging your arm from side to side means "yes"
    B. If the ground is dark, light smoke can’t be seen.
    C If you need some medicine, make a symbol “Ⅱ”.
    D. The pilots make replies with a blue light at night.
    【小题4】What is the passage mainly about?
    A．The explanation of building signals on an island.
    B．The importance of making signals on an island.
    C．Ways of sending out signals on a lonely island.
    D．Ways of receiving signals from a lonely island.

    查看答案和解析>>

    What do you do if you're in trouble on a lonely island? Surely you need to find a way to get in touch with the outside world. Your best chance of doing this is to draw the attention of a passing plane.
    Body signals (信号)
    Pilots from different countries understand body signals if they have the correct training, When you wave your arms up and down in a straight line, it means, "yes". When you point downwards and swing your arm from side to side, it means "no". If you want the pilot to know that it's safe to land, push your hands out in front of you and bend (弯曲) your knees. If you want to say that it's not safe to land, put your arms in the air and move them to one side.
    Smoke signals
    The smoke from a fire can be seen from far away, so it’s a good way to draw attention. If the weather is dry, it isn’t hard to start a fire. Remember, however, that fires can be very dangerous if they get out of control. Never light a tire unless you're sure that it can’t spread. If the ground is dark, light smoke can be seen more easily. Green grass and leaves produce light smoke.
    Ground-to-air signals
    It's a good idea lo build some signals, too. Use large pieces of wood to make the symbols (标记). If you can't find any wood, use earth. Some useful symbols are:
    F "I need food and water"
    II "I need medicine."
    I "I am badly hurt."
    X "I am unable lo move from here."
    Pilots' replies
    If the pilot lowers the plane's wings from side to side, this means: "message received and understood" (At night, the pilot flashes the plane's green lights.) If the pilot flies the plane in a clockwise circle, this means "message received hut not understood" (At night, the: pilot flashes the plants red lights.)
    However, there is no signal which means "message not received. Why not'?
    小题1:How many signals can we use to draw the attention of the passing plane if you're in trouble?
    A．Three.B．FourC．FiveD．Six
    小题2:Which picture means "it's not safe to land"?

    小题3:What can we learn from the passage?
    A. Swinging your arm from side to side means "yes"
    B. If the ground is dark, light smoke can’t be seen.
    C If you need some medicine, make a symbol “Ⅱ”.
    D. The pilots make replies with a blue light at night.
    小题4:What is the passage mainly about?
    A．The explanation of building signals on an island.
    B．The importance of making signals on an island.
    C．Ways of sending out signals on a lonely island.
    D．Ways of receiving signals from a lonely island.

    查看答案和解析>>

    在26个字母中找出元音字母：

    a b c d e f g h i j k l m n o p q r s t u v w x y z

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