七星彩,重點頭尾,二定規律2165期星期天七星彩頭尾二定:千位134578主攻1345個位023578主攻3578重點頭尾二定:4組頭15尾78二定 頭尾:1345, X, X, 3578——-組合開始——-1XX3,1XX5,1XX7,1XX8,3XX3,3XX5,3XX7...