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题目(2012年全国大纲卷第12题):正方形ABCD的边长为1,点E在边AB上,点F在边BC上,AE=BF=3/7,动点P从E出发沿直线向F运动,每当碰到正方形的边时反弹,反弹时反射角等于入射角,当点P第一次碰到E时,P与正方形的边碰撞的次数为A.16B.14C.12D.10这一题是选择题的最后一题,难度较大,当我们发给某重点中学的重点班作答时,也只有少数学生经过作图而大致猜出答案,大部分学生无从下手.从
Title (2012 National Outline Volume 12): the side of the square ABCD is 1, the point E is on the side AB, the point F is on the side BC, AE = BF = 3/7, Move to F, and bounce whenever it encounters a square edge. The bounce angle is equal to the incident angle. When P touches E for the first time, P collides with the edge of the square for A.16B.14C.12D. 10 This is the last question of the multiple-choice questions, which is more difficult. When we send out key courses to some key middle schools, only a few students can roughly guess the answers after making the plans. Most students can not start.