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  3. How Our Memory Works Try to imagine a life without a memory. It would be impossible. You could not use a language, because y

How Our Memory Works Try to imagine a life without a memory. It would be impossible. You could not use a language, because y

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问题                     How Our Memory Works
    Try to imagine a life without a memory. It would be impossible. You could not use a language, because you would not remember the words. You could not understand a film, because you need to hold the first part of the story in your mind in order to understand the later parts. You would not be able to recognize anyone — even members of your own family. You would live in a permanent present. You would have no past and you wouldn’t be able to imagine a future.
    Human beings have amazing memories. Apart from all our personal memories about our own lives, we can recall between 20, 000 and 100, 000 words in our own language as well as possibly thousands more in a foreign language. We have all sorts of information about different subjects such as history, science, and geography, and we have complex skills such as driving a car or playing a musical instrument. All these things and countless others depend on our memory.
    How well you remember things depends on many different factors. Firstly, some people naturally have better memories than others, in just the same way as some people are taller than others, or have different color eyes. Some top chess players, for example, can remember every move of every game that they have ever seen or played.
    Secondly, research shows that different things are stored in different parts of the brain. Ideas, words, and numbers are stored in the left-hand side, while the right-hand side remembers images, sounds, and smells. In most people one side of the brain is more developed than the other, and this may explain why some people can remember people’s faces easily, but can’t remember their names.
    Thirdly, we all remember exciting, frightening, or dramatic events more easily. This is because these experiences produce chemicals such as adrenaline, which boost your memory. They say that anyone who is old enough to remember knows exactly where they were on Tuesday, September 11, 2001, when radio and TV programs around the world were interrupted with the shocking news that the twin towers of the World Trade Center in New York were hit.
    Fourthly, the context in which you learn something can affect how well you remember it. Tests on divers, for example, showed that when they learned things underwater, they could also remember those things best when they were underwater.
    Lastly, the more often you recall a memory, the more likely you are to remember it. If you don’t use it, you lose it. A telephone number that you dial frequently will stay in your memory easily, but you will probably have to write down one that you use only now and again.  
Why can we remember exciting, dramatic, or frightening events better?
选项 A、Because these events involve danger.
B、Because these events rarely happen to us and are likely to stay in our memory longer.
C、Because these events produce chemicals that help us remember better.
D、Because these events produce chemicals that stimulate our imagination.
答案C
解析 本题是细节考查题。题目是：为什么我们能对令人兴奋、惊恐和具有戏剧性的事件有更好的记忆?选C的依据是：第五段第二句：“This is because these experiences produce chemicals such as adrenaline．which boost your memory．”这是因为这些经历能够产生像肾上腺素这样的化学物质，能提高你的记忆力。选项C的意思是因为这些事件能产生帮助我们记忆的化学物质．与原文意思相符。
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