构成比较复杂的物理问题的系统大多数是若干物体构成的开放式或封闭式相互作用系统。求解这类题目的分析方法无外乎两种、一种是采用“隔离”法对系统中的单个物体或局部进行分析研究、沿着从个体到个体或从局都到局部的思维途径去寻求未知量与已知量的关系.另一种是本着整体观念对系统进行整体分析、治着从系统到局部或从整体到个体的思维途径去寻求未知量与已知量的关系.这两种选择被研究对象的方法在 The systems that make up more complex physical problems are mostly open or closed interaction systems composed of several objects. The analysis methods for solving such problems are nothing more than two. One is to use the “isolation” method to analyze individual objects or parts of the system, and follow the way of thinking from individual to individual or from bureau to local. To seek the relationship between the unknown quantity and the known quantity. The other method is to seek the relationship between the unknown quantity and the known quantity in the overall concept of the system to analyze the whole system, to manage the system from the local to the whole or to the individual’s way of thinking. The two methods of choice are studied