题目内容：
生态系统的发展趋势是营养物质循环变慢。( )
此题为判断题(对，错)。
参考答案：【答案仅供学习，请勿对照自行用药等】
选择题：生态系统的发展趋势是营养物质循环变慢。( )
- 题目分类：习题答案
- 题目类型：选择题
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