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粤A学生呆呆(1120******) 21:59:01 阅A爱好者渣k(249533164) 22:03:58 阅A爱好者渣k(249533164) 22:06:46 先证明上面那交点是定点,于是它就是所求 可以拉伸成圆来证,懒得写了,这些扯得太多……
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2025-6-8 10:23 GMT+8
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