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题型:阅读选择 题类:真题 难易度:普通


 Let's try doing the following experiment.

 What to do:

 Use string to hang a paper clip or other small object at about chest(胸部)level.

 Pick up a stick,such as a broom handle. Take three or four steps away from the paper clip.

Now close one eye and walk toward the paper clip. Try to touch it with the tip of the stick. If you miss,try again,still keeping one eye closed. Now try it with both eyes open and see if it's easier to do.

 How it works:

 In the experiment,you have to judge how far away the paper clip is. Your brain has several ways of doing this.

 One simple way depends on how much your eye has to focus(聚焦)itself. Using only one eye,most people will find it difficult to touch the paper clip on the first try,but the brain still gets some information about distance—though not much.

 Your brain can judge distance much better when you look at something with both eyes. In fact,your brain has more than one way to use both eyes in judging distance. For example,to see anything clearly,you have to make both of your eyes point at the object. When you look at a nearby object,your eyes turn inward. You can feel this happening if you look at the tip of your finger and move your finger toward your nose.

 Your brain gets information from the eyes about how much they are pointing toward each other. Using that information,the brain can tell how far away any object is,whether it is a basketball or a paper clip.

(1)、How many materials do we need at least to do the experiment?

A、Two   B、Three  C、Four  D、Five
(2)、The passage is mainly about that with eyes our brain can judge        .

A、how big an object is   B、how high an object is C、how far away an object is       D、how much information an object is
(3)、Which of the following is true according to the passage?

A、Our brain judges distance in one way when we use both eyes. B、Our brain cannot judge the distance of a small object but a big one. C、How much our eyes focus helps our brain judge the size of an object.            D、How much our eyes focus helps our brain judge the distance of an object.
(4)、From the experiment we can infer(推断)        .

A、with one eye we can see an object as clearly as we use two eyes B、our eyes turn towards the inside when we look at an object very near C、within 3 or 4 steps,the nearer an object is,the more clearly we can see it D、our brain can hardly get any information about distance when we use one eye
举一反三
阅读下面材料,从每题所给的A、B、C、D四个选项中选出最佳选项。

    E-waste is fast becoming a serious problem around the world. This report will examine this problem and provide some possible ways to solve it.

We live in a society that is producing and using electronics(电子产品) all the time. It is often cheaper to buy new products than to repair old ones. Also, through clever advertising, companies always encourage people to change their old TVs, mobile phones and computers for the latest models. E-waste is created when we throw away old ones. In the EU alone, about 8,700,000 tons of e-waste is produced each year. Sadly, just over 1,000,000 tons is recycled.

    Burying(填埋) e-waste or burning it cause serious problems for the environment. Electronics have dangerous things in them. These things can then get into the ground or pollute the air when they are burnt.

    In recent years,   ▲  . However, their plans are not always managed properly. Sometimes electronics are just sent to poor countries such as Ghana. Here they are often burnt in public areas, which is very bad for people's health. Setting up recycling centers is a good way to solve this problem. E-cycling centers could recycle the parts that can be reused and deal with the rest properly.

    Another way is to make producers responsible(负责任) for their used products. This means that producers must take back old products which are no longer wanted. They should then make sure they are properly recycled or reused.

    As for us, we should try to cut down on e-waste. Change electronics only when we have to. And don't buy a product just to have the latest model.

    E-waste is a serious problem in the modern world. Both producers and users must take actions and try to keep it to the smallest amount.

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