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    ( ) , David! A car is coming . A. Look out B. Look down C. Look up D. Look at 【查看更多】

     

    题目列表(包括答案和解析)

    从A、B、C、D中选出能代替句中画线部分的最佳选项。

    --Look out, David! A car is coming.

    [　　]

    A．Be careful

    B．Look outside

    C．Look around

    D．Look back

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    Have you ever rubbed your hands together when they get cold? Why do we do that? We do that for friction. Friction happens when two things that aren’t very smooth rub together to make heat energy. The faster you rub two things together, the more friction ( and heat) you can make. Let’s discover friction!

    WHAT YOU’LL NEED

    ·Soap ·Water·Your hands!

    WHAT TO DO

    Make sure your hands are dirty.

    Rub your hands together until you feel the heat of your hands.

    Now, use soap and water to get your hands very slippery(滑的).

    Try to make friction happen while your hands are slippery.

    Please write down what has happened.

    LET’S TALK!

    Friction is an energy that happens when two things rub together. When friction happens, it makes heat! When your hands are slippery, they won’t make very much friction and your hands won’t get so hot.

    DID YOU KNOW?

    Friction happens when you stop your fast running bike.

    Ancient people made fire by rubbing two pieces of wood together. Friction happened though they didn’t know it.

    ____?___

    Friction is everywhere. Have you ever noticed situations where friction is happening? If not, ask your parents to take you out in a car. If it is not hot, touch the tires(轮胎) of the car before and after a short drive to see how much warmer they get from friction.

    1. This text is most probably________________________.

    A. a science report????????????? ????????????? ????????????? 　 B. a car advertisement

    C. a rubbing introduction?????? D. a chemistry programme

    2.What does the word “friction” in this text mean in Chinese????????

    A.摩擦????????????? ????????????? B. 冷却??????? C. 膨胀????????????? ????????????? ????? D.震动

    3.___________ is not an example of friction.

    A. Bike riding????????????? B. Car driving??? C. Hands rubbing????????????? ? D.Friction discovering

    4.What’s the last column(栏目)?

    A. THINK IT OVER!????????????? ????????????? ????????????? ????????????? ?? B. WHAT HAPPENED?

    C.EVERYDAY ACTION:????????????? D. WORK WITH PARENTS

     

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    — What’s 　　　　 matter?
    — A car is in 　　　　 way.

    A．a; a B．/; theC．the; aD．the; the

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    — What’s 　　　　 matter?

    — A car is in 　　　　 way.

    A．a; a              B．/; the             C．the; a            D．the; the

     

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    阅读下面短文，从题中所给的ABC四个选项中选出最佳选项。

    　　According lo a new survey．Students’ safety has become a big problem．Nearly 50％ of students say they are worried about robbery(抢劫)on the way to and from school．Now in main big cities．in China some schools have taught all unusual lesson：self-protection．Students like this lesson because there are no exams or boring classes．And they can learn how to save lives and know how to stop danger before it really happens．

    　　Chen Haoyu, a teacher at Beijing No 25 Middle School．give young students advice on how to deal with danger

    　　If you are robbed

    　　Keep calm．lf you can not cry for help or run away．Give the robber your money．Try to remember what the robber looks like and tell the police later．If you are in a traffic accident．

    　　It a car hits you．You should remember the car number．If it is a bicycle．Try to call your parents before you let the rider go．This is because you don't know how seriously you are hurt

    　　If it is raining hard and there is lighting．(闪电)

    　　Don’t stay in high places and stay away from trees．

    　　When there is a fire．Get away as fast as yon can．Put wet things on your body and try to find an exit．Do not lake the lift．

    　　If someone is drowning(溺水)

    　　If you can’t swim．don’t get into the water．Cry out for help．

    　　Remember that danger is never as far away as you think．Take care of yourself at alI times!

    (1)

    Why do students like the self-protection lesson?

    ①Because there are no tests．

    ②Because the lessons are boring

    ③Because they can learn how to save lives．

    ④Because they know how to slop danger before it happens．

    [　　]

    A．

    ①②

    B．

    ②③

    C．

    ①②④

    D．

    ①③④

    (2)

    What will you do if a bicycle hurts you?

    [　　]

    A．

    I will remember the bicycle number．

    B．

    I won't let the rider go until I rail my parents．

    C．

    will let the rider go before I call my parents．

    D．

    I will let the rider go because I know how seriously I am hurt．

    (3)

    lf your house is on fire, you must ________．

    [　　]

    A．

    put dry things on your body

    B．

    run quickly and take the lift

    C．

    run away and find an exit as quickly as you Can

    D．

    take everything you have and then run away

    (4)

    There ________ ways of self-protection mentioned in the passage．

    [　　]

    A．

    3

    B．

    4

    C．

    5

    D．

    6

    (5)

    The best title for this passage is ________．

    [　　]

    A．

    How to Keep Calm

    B．

    Self-protection

    C．

    An usual lesson

    D．

    Danger

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