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通过选择地面参考系及质心参考系,对2014年高考理综安徽卷第24题进行了分析.试题设问层级逐升,能力要求高.在质心系中求解可避繁就简,化难为易.试题源于竞赛训练题,命题方向值得关注.
By selecting the ground reference frame and the reference frame of the centroid, the paper analyzes the 24th question of the comprehensive college entrance examination in 2014. The test questions raise the level and the ability demands are high. The test questions come from the competition training questions, and the proposition directions deserve attention.