在高中物理中有一类题目,学生拿到手后,总感觉到少了一些已知条件,所知物理量非常少,从而不敢去动手列式求解.但经过仔细分析下来,在文字描述当中又隐含着许多所需要的条件.做题过程中所假设的一些物理量,最终往往都能够顺利消去,以下举出几例来加以说明分析. In high school physics there is a class of questions, students get the hand, always feel less known conditions, the known physical quantity is very small, so afraid to go hand-in-hand solution.But after careful analysis, in the text description which again Contains a lot of the necessary conditions.During the process of making some of the physical quantity, the final often can be successfully eliminated, the following is a few examples to illustrate the analysis.