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    First,you put on flying donuts.Then you turn it on and jump the air. A. with B. into C.for D.over 【查看更多】

     

    题目列表(包括答案和解析)

    Put an ice cube from your fridge into a glass of water. You have a piece of string(线) 10 centimeters long. The problem is to take out that piece of ice with the help of the string. But you must not touch the ice with your fingers.
    You may ask your friends to try to do that when you are having dinner together. There is a saltcellar on the table. You must use salt when you carry out this experiment.
    First you put the string across the piece of ice. Then put some salt on the ice. Salt makes ice melt(融化). The ice round the string will begin to melt. But when it melts, it will lose heat. The cold ice cube will make the salt water freeze(结冰) again.
    After a minute or two you may raise the piece of string and with it you will raise your piece of ice!
    This experiment can be very useful to you. If, for example, there is ice near the door of your house, you must use very much salt to melt all the ice. If you don’t put enough salt, the water will freeze again.
    【小题1】We must use           when we carry out this experiment.

    A．a fridgeB．some foodC．a tableD．some salt
    【小题2】How long will it take to carry out this experiment?
    A．More than three minutes.B．Five minutes or two.
    C．Only one minute or two.D．About ten minutes.
    【小题3】We can learn something about           from the passage.
    A．physicsB．biologyC．chemistryD．maths

    查看答案和解析>>

    阅读理解：

    　　You want to run across the street to catch the bus which is leaving soon? But wait! You'd better not．If a policeman sees you, you'll have to pay a fine(罚款)．

    　　New traffic laws(交通法)say that if people cross the street when the light is red, they can be fined as much as 50 yuan．

    　　Traffic accidents killed more than 104, 000 people in China last year．Chinese cities have more cars than ever．Drivers and pedestrians(行人)must work together to make the streets safer．

    　　The law has new rules for drivers and pedestrians．Drivers have to slow down when they are close to crosswalks．If people are in a crosswalk, cars must stop．to let them pass．

    　　There are rules for bus drivers, too．If bus drivers smoke, drink or make phone calls while driving, they can be fined．Buses that carry too many people are also against the law．

    　　Pedestrians will have to walk more safely under the new law．They must cross streets at crosswalks．Also, they shouldn't climb over the fences(栅栏)along streets．

    　　Do you bike to school? It's not a good idea to carry classmates on the back．You could be fined 50 yuan．

    　　And stay in the bike lane(慢车道)when you’re riding．The big roads are for cars and buses．

    　　Do you like to ride your uncle's motorbike? When you put on your helmet(头盔), ask him to put one on, too．People on motorbikes must wear helmets, the new law says．If they don't, they'll have to pay 200 yuan．

    　　Do you ride in cars often? Don't forget to put on your seat belt(安全带), even if you’re going for a short taxi ride．It could save your life．

    　　If you see a hit-and-run(肇事逃逸), tell the police．They may give you a reward(奖赏)．And don't be afraid to help people to the hospital if they are hurt in an accident．Don't worry about money．The new law says that doctors must take care of them even if they can't pay right away．

    (1)

    Don't go across the road when ________．

    [　　]

    A．

    the light is green

    B．

    the light is red

    C．

    the bus is leaving

    D．

    traffic is busy

    (2)

    What does the word “crosswalk” mean is Chinese?

    [　　]

    A．

    过马路

    B．

    人行横道

    C．

    立交桥

    D．

    车行道

    (3)

    If you are a bus driver, ________ while you are driving, according to the new traffic laws．

    [　　]

    A．

    you can make a phone call

    B．

    you can't talk to others

    C．

    you can't smoke

    D．

    you can drink

    (4)

    When you ride in a car, the first thing you must do is ________．

    [　　]

    A．

    to put on the helmet

    B．

    to tip the driver

    C．

    to put on the seat belt

    D．

    to see if it carries too many people

    (5)

    You should do all the following EXCEPT ________．

    [　　]

    A．

    carrying your classmate on the back when you’re riding a bike

    B．

    phoning the police when you see a hit-and-run

    C．

    helping people to the hospital if they are hurt in an accident

    D．

    wearing your helmet while riding a motorbike

    查看答案和解析>>

    Put an ice cube from your fridge into a glass of water. You have a piece of string (线) 10 centimeters long. The problem is to take out that piece of ice with the help of the string. But you must not touch the ice with your fingers.

        You may ask your friends to try to do that when you are having dinner together. There is a saltcellar on the table. You must use salt when you carry out this experiment.

        First you put the string across the piece of ice. Then put some salt on the ice. Salt makes ice melt(融化). The ice round the string will begin to melt. But when it melts, it will lose heat. The cold ice cube will make the salt water freeze (结冰) again.

        After a minute or two you may raise the piece of string and with it you will raise your piece of ice!

        This experiment can be very useful to you. If, for example, there is ice near the door of your house, you must use very much salt to melt all the ice. If you don’t put enough salt the water will freeze again.

    1. We must use ________ when we carry out this experiment.

        A. a fridge 　　　　   B. some food 　　　　　　  C. a table 　　　　　　 D. some salt

    2. How long will it take to carry out this experiment?

        A. More than three minutes. 　　　　　　   B. Five minutes or so.

        C. Only one minute or two. 　　　　　　   D. About ten minutes.

    3. What is the task(任务) of this experiment?

        A. Put the ice cube into the glass of water with the help of the string.

        B. Take out the ice cube in the glass of water with the help of the string.

        C. Take out the ice cube in the glass of water with your fingers.

        D. Put some salt on the ice cube and then put the string across it.

    4. How many things at least are used in this experiment?

        A. Three. 　　　　　　 B. Four. 　　　　　　   C. Six. 　　　　　　　　 D. Seven.

    5. We can learn something about ________ from the passage.

    A. physics 　　　　   B. biology 　　　　    C. chemistry 　　    D. maths

     

    查看答案和解析>>

    阅读下面短文，然后根据短文内容选择最佳答案。

    　　Put an ice cube from your fridge into a glass of water．You have a piece of string 10 centimetres long．The problem is to take out that piece of ice with the help of the string．But you must not touch the ice with your fingers．

    　　You may ask your friends to try to do that when you are having dinner together．There is a saltcellar on the table．You must use salt when you carry out this experiment．

    　　First you put the string across the piece of ice．Then put some salt on the ice．Salt makes ice melt．The ice round the string will begin to melt．But when it melts, it will lose heat．The cold ice cube will make the salt water freeze again．

    　　After a minute or two you may raise your piece of ice!

    　　This experiment can be very useful to you．If, for example, there is ice near the door of your house, you must use much salt to melt all the ice．If you don't put enough salt, the water will freeze again．

    (1)

    We must use ________ when we carry out this experiment．

    [　　]

    A．

    a fridge

    B．

    some food

    C．

    a table

    D．

    some salt

    (2)

    How long will it take to carry out this experiment?

    [　　]

    A．

    More than three minutes．

    B．

    Five minutes or so．

    C．

    Only one or two minutes．

    D．

    About ten minutes．

    (3)

    What is the purpose of this experiment?

    [　　]

    A．

    Put the ice cube into the glass of water with the help of the string．

    B．

    Take out the ice cube in the glass of water with the help of the string．

    C．

    Take out the ice cube in the glass of water with your fingers．

    D．

    Put some salt on the ice cube and then put the string across it．

    (4)

    How many things at least are used in this experiment?

    [　　]

    A．

    Three．

    B．

    Four．

    C．

    Six．

    D．

    Seven．

    (5)

    We can learn something about ________ from the passage．

    [　　]

    A．

    physics and biology

    B．

    biology and science

    C．

    chemistry and biology

    D．

    physics and chemistry

    查看答案和解析>>

    Read the sentences. Complete the crossword puzzle.

    A：How do you make a turkey sandwich?

    B：Well, first you put some (3 across) on the bread.

    A：Then what?

    B：Then you cut up some (1 down) and put them on the sandwich.

    A：What's next?

    B：Next you cut up a small (5 across) and put it on the bread. Then add some slices of (4 down).

    A：And what else?

    B：You can put a teaspoon of (6 across) on the turkey. You can also put some (2 down) on it.

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