长方形ABCD上,从AB边上某处P点击出,分别撞击球桌的边BC、CD、DA各1次后,又回到出发点P处.详见补充说明长方形台球桌ABCD上,一球从AB边上某处P点击出,分别撞击球桌的边BC、CD、DA各1次后,又回
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![长方形ABCD上,从AB边上某处P点击出,分别撞击球桌的边BC、CD、DA各1次后,又回到出发点P处.详见补充说明长方形台球桌ABCD上,一球从AB边上某处P点击出,分别撞击球桌的边BC、CD、DA各1次后,又回](/uploads/image/z/3757707-27-7.jpg?t=%E9%95%BF%E6%96%B9%E5%BD%A2ABCD%E4%B8%8A%2C%E4%BB%8EAB%E8%BE%B9%E4%B8%8A%E6%9F%90%E5%A4%84P%E7%82%B9%E5%87%BB%E5%87%BA%2C%E5%88%86%E5%88%AB%E6%92%9E%E5%87%BB%E7%90%83%E6%A1%8C%E7%9A%84%E8%BE%B9BC%E3%80%81CD%E3%80%81DA%E5%90%841%E6%AC%A1%E5%90%8E%2C%E5%8F%88%E5%9B%9E%E5%88%B0%E5%87%BA%E5%8F%91%E7%82%B9P%E5%A4%84%EF%BC%8E%E8%AF%A6%E8%A7%81%E8%A1%A5%E5%85%85%E8%AF%B4%E6%98%8E%E9%95%BF%E6%96%B9%E5%BD%A2%E5%8F%B0%E7%90%83%E6%A1%8CABCD%E4%B8%8A%2C%E4%B8%80%E7%90%83%E4%BB%8EAB%E8%BE%B9%E4%B8%8A%E6%9F%90%E5%A4%84P%E7%82%B9%E5%87%BB%E5%87%BA%2C%E5%88%86%E5%88%AB%E6%92%9E%E5%87%BB%E7%90%83%E6%A1%8C%E7%9A%84%E8%BE%B9BC%E3%80%81CD%E3%80%81DA%E5%90%841%E6%AC%A1%E5%90%8E%2C%E5%8F%88%E5%9B%9E)
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