第11课：卑微里的力量
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Other
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4th Grade
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Hard
Elva Wong
Used 1+ times
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4 Slides • 0 Questions
1
苔藓的作用
防止水土流失
促进土壤形成
检测空气污染程度的指示功能
2
苔藓对周围环境的影响
翠绿
川流不息
温驯的动物
光秃秃
停滞不前
动物急躁不安
3
世上的生物都是共荣共存的
（共同存在，共同繁荣）
4
生态失衡的话，会发生什么？
苔藓的作用
防止水土流失
促进土壤形成
检测空气污染程度的指示功能
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