2008年全国高考理综卷Ⅰ选择题第21题,命题以中学常见的基本器材———“平板玻璃砖”入手,以光的折射为情景,要求学生比较不同色光在玻璃砖内的传播时间长短.本题突出了对物理过程的分析与推理能力的考查,又注重对考生“利用数学知识解决物理问题的能力”的考查,难度相对较大. In 2008 the national college entrance examination theory comprehensive volume I multiple choice question 21, the proposition to the common basic equipment in middle school --- “flat glass brick” to start with the refraction of light as the scene, requiring students to compare the different shades of light in glass bricks spread the length of time. This question highlights the examination of the ability to analyze and reason about physical processes, but also focuses on examination of examinees’ ability to use mathematical knowledge to solve physical problems, which is relatively difficult.