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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
2011-01-02
91
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.
【M5】
选项
答案
insensitive改成sensitive
解析
逻辑错误,逻辑反义词。上一句说人类也不能识别色谱中的所有颜色,此句举例说明紫外线就是人类不能识别的颜色之一,虽然蚂蚁和蜜蜂对这种颜色很______。有转折的意味,也就是说应该是“可以识别的”、“敏感的”。
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专业英语八级
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