1.通过上机计算体会迭代法求解线性方程组的特点，并能和消去法比较； 2.运用所学的迭代法算法，解决各类线性方程组，编出算法程序； -1. Understand iteration method to solve linear equations by computer calculation, the characteristics of and can be compared to elimination method 2. Use iterative algorithm to