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为什么说城市生态系统营养关系倒置？ 知乎 Template






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为什么说城市生态系统营养关系倒置？ 知乎 sketch template
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1．了解生态系统的组成成分及生态系统的营养结构理解生态系统四种组分的功能地位及相互关系理解营养结构与功能的关系掌握营养级的概念以及营养级 sketch template
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