The passage is mainly a discussion of_

The passage is mainly a discussion of______.

A the adaptations of organisms to their environments
B the reasons why organisms have their particular shapes and colors
C the special way of life of each living thing
D the hows and whys of the structures of organisms

参考答案

参考解析：

[解析] 本文前两句开篇点题，主要讨论生物怎样适应环境。

分类：其他

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