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Human vision like that of other primates has evolved in an arboreal environment. In the dense complex world of a tropical forest
Human vision like that of other primates has evolved in an arboreal environment. In the dense complex world of a tropical forest
admin
2013-02-04
71
问题
Human vision 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 well to develop an acute sense of smell. In the 【M1】______
course of evolution members of the primate line has acquired large 【M2】______
eyes while the snout has shrunk to give the eye an unimpeding view. 【M3】______
Of mammals only 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 【M4】______
electromagnetic spectrum. Ultraviolet rays are invisible to humans though
ants and honeybees are insensitive to them. Humans have no direct perception 【M5】______
of infrared rays like the rattlesnake that has receptors tuned into 【M6】______
wavelengths longer than 0. 7 micron. The world would look eery different 【M7】______
if human eyes are sensitive to infrared radiation. Then instead of the darkness 【M8】______
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. 【M9】______
The color sensitivity of normal human vision is rarely surpassed even 【M10】______
sophisticated technical devices.
【M1】
选项
答案
在well后增加than
解析
句法错误,句子结构不完整。具体说来,此处缺少比较状语从句的连接词than。该句意为在热带雨林中,好的视力比嗅觉要重要,前面出现了more后面就应该有than;原文中没有than,句意变成了“在热带雨林中,好的视力可以有助于发展好的嗅觉”,显然不符合逻辑。
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专业英语八级
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