在1997年全国高考物理试题中,涉及到临界问题的试题占74分,全卷中的难题和高分值题,基本上都涉及到临界问题,大多考生在临界问题上失分率较高,对临界问题应予以重视,值得探究.1 物理变化过程的临界状态任何一个物理问题,都是事物所处的若干个物理状态和过程的综合反映,过程是由状态变化形成 In the 1997 national college entrance examination physics test, the questions involving critical questions accounted for 74 points. The problems in the whole volume and the high score question basically involved critical questions. Most of the candidates had higher scores on critical questions. Attention should be paid to critical issues. It is worth exploring. 1 The critical state of the physical change process Any physical problem is a comprehensive reflection of several physical states and processes in which things are located. The process is formed by state changes.