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问题1设动点P沿正五边形的周界移动,移动到某一顶点时,以相同的概率移向与该点相邻的两个顶点之一,所需时间为1秒钟．求:
Question 1 The fixed point P moves along the perimeter of the regular pentagon and moves to one of the vertices with the same probability and moves to one of the two vertices adjacent to the point. The time required is 1 second. begging: