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  3. The world is known to us through many senses not just hearing, smell, vision and at close range, touch, and taste. Our skins

The world is known to us through many senses not just hearing, smell, vision and at close range, touch, and taste. Our skins

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问题    The world is known to us through many senses not just hearing, smell, vision and at close range, touch, and taste.
   Our skins let us know whether the air is moist or dry, whether surfaces are wet without being sticky or slippery. From the uniformity (均匀) of slight pressure, we can be aware how deeply a finger is thrust (刺) into water at body temperature, even if the finger is enclosed in a rubber glove that keeps the skin completely dry. Many other animals, with highly sensitive skins appear to be able to learn still more about their environment. Often they do so without employing any of the five senses.
   By observing the capabilities of other members of the animal kingdom we come to realise that a human being has far more possibilities than are utilized. We neglect ever so many of our senses in concentrating on the five major ones. At the same time a comparison between animals and man draws attention to the limitations of each sense. The part of the spectrum (光谱) seen by colour conscious man as red is non-existent for honey-bees. But a bee can see far more in flowers than us, because the ultra-violet (紫外线) to which our eyes are blind is a stimulating (刺激的) part of the insect’s spectrum and for honey-bees at least constitutes (构成，组成) a separate colour.
What is the main idea of the passage?
选项 A、All senses have their limitations.
B、Insects are more sensitive to colour than man.
C、Man has not fully utilized all his senses.
D、Man is not as good as animals in learning about the environment.
答案C
解析 本篇文章主要通过对比人和动物的感觉器官，来说明人未能完全运用他的感应功能。答案C最符合题意。
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