什么是动物? 动物与植物有什么区别? 动物是如何分类的? 眼镜蛇会随着音乐起舞吗？ 为什么蝙蝠都倒挂着睡觉？
什么是动物? 动物与植物有什么区别? 动物是如何分类的? 眼镜蛇会随着音乐起舞吗？ 为什么蝙蝠都倒挂着睡觉？
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