目 录摘要......................................................................1关键词....................................................................10 引言....................................................................21 圆锥曲线双切结构模型....................................................21.1 双切结构的几何定义与分类..........................................21.2 具有双切结构的圆锥曲线问题的求解..................................41.3 椭圆、双曲线、抛物线的双切特性对比................................62 双...
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