2012年上海高考物理试题中第23题填空题重点考查了学生对s-t图象的理解,但考查的方式与以往相比较有明显的不同,凸显了高考越来越注重对能力考查的特点.一、试题及其解析质点做直线运动,其s-t关系如图所示.质点在0～20s内的平均速度大小为m/s;质点在 2012 Shanghai college entrance examination questions in the 23rd questions fill in the blank test focus on the student’s understanding of the st image, but the examination of the way compared with the past there is a clear difference, highlights the college entrance examination more and more emphasis on the ability to test characteristics. , The test questions and their analysis of particles do linear motion, the st relationship as shown in Fig. The average particle size within 0 ~ 20s the size of m / s;