Human visiun like that of other primates has evolved in an arboreal -考呗网题库移动版

简答题Human visiun like that of other primates has evolved in an arboreal
environment. In the dense complex world of a tropical forest, it is more
important to see as well than to develop an acute sense of smell. In the 41.__________
course of evolutiun members of the primate line has acquired large 42. __________
eyes while the snout has shrunk to give the ey, e an tmimpeding view. 43. __________
Of mammals 0nly humans and some primates enjoy color vision. The red
flag is black to the bull. Horses live in a monochrome world, Light visible to
human eyes, therefore, occupies only a very narrow band in the whole 44. __________
electromagnetic spectrum. Ultraviolet rays are invisible to humans though
ants and honeybees are insensitive to them. Humans have no direct perception 45. __________
of infrared rays like the rattlesnake that has receptors tuned into 46. __________
wavelengths longer than 0.7 micron. The world would look eerie different 47. __________
if human eyes are sensitive to infrared radiation. Then instead of the darkness 48. __________
of night, we would be able to move easily in a strange shadowless world
where objects glowed with varying degrees of intensity. But human eyes excel
in other way. They are in fact remarkably discerning in color gradation. 49. __________
The color sensitivity of normal human vision is rarely surpassed even 50. __________
sophisticated technical devices.
根据内容，回答题。
第（41）题__________.

参考答案暂无

解析:【结构分析】
第一句到第三句论述了在人类进化的过程中，人的视力逐渐进化成可以辨别各种颜色是因为人的祖先生活在植被浓密的丛林中，比起敏锐的嗅觉，他们更需要看清周围的一切。人类祖先原有的大嘴逐渐变小，促进了眼部的进化。
第四句到第六句论述了哺乳动物中只有人类和一部分灵长类动物可以辨别颜色，牛和马都只能看到单色的世界。
第七句到第十句指出人类的眼睛不能看到紫外线和红外线。
第十一句到第十四句指出人的视觉能进行精确的色彩分级，连精密的仪器都无法超越。
【试题解析】
去掉well前的as。本题考查比较级。该句意为“在热带雨林中，好的视力比灵敏的嗅觉要重要”，weU应作为副词，修饰动词s∞，故去掉as。

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