从范德瓦尔斯方程出发，利用牛顿迭代法，求解对应材料的binomal线和binomal线，给出相应的相图，并作出对应的P-T图像。(Starting from the Van Der Waals equation, using the Newton iterative method, the binomal line and the binomal line of the corresponding materials are solved, and the corresponding phase

牛顿拟合法求解超越方程，适用于含有多元函数(Newton's fitting method for solving transcendental equation is suitable for multivariate functions)