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数学大师：圆周角——斗兽场中的铁与血
战功赫赫的罗马将军马克西姆斯， 被篡权的皇帝陷害，妻儿被杀， 自身也只能在罗马斗兽场中， 表演一场场你死我活的搏杀。 斗兽场外面围起来就是一个圆心角， 什么是圆周角呢？
初三数学重点知识导入14/28
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