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The Special Ability of Human Beings Every day we experience one of the wonders of the world around us without even realizing

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问题                   The Special Ability of Human Beings
   Every day we experience one of the wonders of the world around us without even realizing it. It is not the amazing complexity of television, nor the impressive technology of transport. The universal wonder we share and experience is our ability to make noise without mouths, and so transmit ideas and thoughts to each other’ s minds. This ability comes so naturally that we tend to forget what a miracle(奇迹) it is.
   Obviously, the ability to talk is something that marks humans off from animal. Of course, some animals have powers just as amazing. Birds can fly thousands miles by observing positions of the stars in the sky in relation to the time of day and year. In Nature’ s talent show, humans are a species of animal that have developed their own special act. If we reduce it to basic terms, it’ s an ability for communicating information to others, by varying sounds we make as we breathe out.
   Not that we don’ t have other powers of communication. Our facial expressions convey our emotions, such as anger, or joy, or disappointment. The way we hold our heads can indicate to others whether we are happy or sad. This is so-called "body language". Bristling (直立的) fur is an unmistakable warning of attack among many animals. Similarly, the bowed head or drooping tail shows a readiness to take second place in any animal gathering.
   Such a means of communication is a basic mechanism that animals, including human beings, instinctively acquire and display. Is the ability to speak just another sort of instinct? If so, how did human beings acquire this amazing skill? Biologist can readily indicate that particular area of our brain where speech mechanisms function, but this doesn’ t tell us how that part of our bodies originated in our biological history.

How do we explain that human beings have the ability to speak according to biologists?
选项 A、It is hard to say.
B、There are speech mechanisms that function in our brain.
C、We acquire the ability by learning from others.
D、There is a speech machine that can work in our brain.
答案B
解析 根据题目中关键词biologists可定位至文章最后一段最后一句。根据该句内容可知，生物学家表明人类大脑中有一块区域是语言区，用来解释人类为何拥有语言能力。因此该题正确答案为B。
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