摘要
讨论了从P-V图上判断某过程是否可能为多方过程的方法，充实了多方过程的判断方法，有助于避免一种常见的错误．
A method with which a possible polytropic process can be judged is discussed based on the shape of a P-V graph line. The method enriches judgement of polytropic processes and is conducive to avoiding common mistakes in calculating Cn.
