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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
阅读理解

    Space vegetables are grown from seeds(种子) that have been taken to space and brought back to the earth. The seeds are affected by the radiation(辐射)and low gravity in space. When they are brought back to the earth, these seeds produce vegetables that are bigger and healthier than normal vegetables. However, some people worry about eating space vegetables. They think that space vegetables might not be good for us and could make us get sick because of the radiation in space. However, people should not be frightened because space vegetables are very healthy.

    Here are some facts that you should know about space vegetables.

Space vegetables are grown from seeds that are carefully chosen. When seeds are brought back from space they are tested to make sure that they will be safe to eat.

    Space vegetables are better for you than normal vegetables. For example, space tomatoes stay fresh for twenty days, which is one week longer than normal tomatoes。

    After genetically modified (转基因)food appeared in the market, people worried that they were eating unknown things. For example, if nut genes(坚果基因) are put inside potatoes, people allergic(过敏的) to nuts might get sick from eating these potatoes because they do not know they are also eating nuts. Unlike genetically modified food, space vegetables have not been genetically changed. This means that no new genes are put into the vegetables. Therefore, there are no dangers of eating unknown.

阅读理解

    When your pen is broken, the battery in your toy runs out, or you have some leftover food, what do you do with these things? You will probably throw them all into one trashbin. But actually, all of these pieces of trash need to be sorted (分类) separately.

    Garbage sorting is a big problem worldwide. In recent years, some Chinese cities have been working hard on it.

    Shanghai has worked with Alipay to create a "green account (账户)" service for its residents (居民). Account holders get points by correctly sorting their garbage. Through the Alipay app, they can exchange the points for milk, phone cards and other products. The city is asking all of its residents to sort their garbage into four groups: wet, recyclable (可回收的), harmful and dry.

    Wet waste is also known as household waste. "They are things you don't want but that pigs can eat," Guangzhou Daily explained.

    Paper, metal (金属), glass and other things that can be reused are recyclable waste.

    Harmful waste includes things like medicine, batteries and fluorescent bulbs (荧光灯泡).

    Finally, any waste that's not wet, recyclable or harmful will go in the "dry waste" bin.

    Many other Chinese cities are also using this method to sort their garbage. For example, Shenzhen has been sorting its garbage into the same four groups since 2012. Students there also receive waste-sorting guidebooks that they must study.

    China is improving its waste-sorting efforts. There is still a long way to go. But it's never too late to learn how to sort your trash properly and protect the environment.

    If you don't sort your garbage, all of it will go to a landfill (垃圾填埋场) and be buried together. These landfills can take up large areas of ground that could have been used for planting trees. The electronic waste you throw away, such as batteries, can pollute the soil and water. Other pieces of garbage, like the metal part of a pen, can be used to make other things if they are properly recycled.

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