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  3. Human beings act in a different way from that of animals just because they can speak while animals cannot. Even the cleverest an

Human beings act in a different way from that of animals just because they can speak while animals cannot. Even the cleverest an

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问题     Human beings act in a different way from that of animals just because they can speak while animals cannot. Even the cleverest animals cannot do things which to us seem very simple and which small children, as soon as they learn to talk, would be able to do.
    A German scientist, who made experiments for many years with big apes, found that his apes could use sticks as tools to pull down bananas which they could not reach. But they only used the stick to get a banana when both the stick and the banana were in view at the same time. If the banana was in front of them and the stick was behind them, they could not use the stick. They could not bear the banana in mind long enough to look around and pick up the stick and then use it.
    The reason for this is clear. We have words for banana and stick which help us to think about these things when they are not in sight. Even a small child knowing the words "banana" and "stick" has an idea of their relationship and is able to think of "stick" together with "banana" and to remember this long enough to pick the stick from behind and use it on the banana.
    Unable to speak, animals cannot keep their knowledge of things for long. That is why they often interrupt one line of action to something else and later forget it completely. Human beings, on the other hand, use language and are able to go after one thing continuously and do it with a definite aim.
Human beings and animals act very differently because______.
选项 A、human beings know how to use a stick while animals don’t know
B、human beings can think while animals can’t
C、human beings have a good memory while animals haven’t
D、human beings can speak while animals can’t
答案D
解析 本题问人的行为与动物的行为不同的原因是什么。根据第一段第一句：人类行为方式与动物的不同，这是因为人类能说话，而动物不能。即使最聪明的动物也不会做在我们看来是很简单的事情，而这些事情小孩一学会说话就能做。因此，本题的正确答案应是D。
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