探究3：参数变化对圆锥曲线影响的统一性（选必1：P123 a、c、e对双曲线扁平的影响）

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  1. ★探究问题：当e越大时，对圆锥曲线的影响是否有规律，规律是什么？请在画板下方回答你的探究结论。 (.ggb)