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一道排列组合题，考察基本功，如何确定到底有多少种方法呢
本部分的内容是为打卡易错题1000题的视频版；本节讲述了一道排列组合题，考察基本功，希望对大家有帮助。@头条教育
高三数学一轮复习错题没人讲解，可看这里，解决你没搞明白的问题471/893
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