题目内容：
生态系统退化的特点主要包括结构性失调和功能性失调。
A.正确
B.错误
参考答案：
选择题：生态系统退化的特点主要包括结构性失调和功能性失调。
- 题目分类：中国大学MOOC慕课
- 题目类型：选择题
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