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用图形方法建立了商品供求关系的蛛网模型，利用差分方程将蛛网模型的结果用公式表示出来，并对结果进行解释。将模型适当推广，可对市场经济调控起稳定作用。
The establishment of the cobweb model of the supply and demand of commodities by means of graphic method shows the result of the cobweb model by using the difference equation and expounds the result. Appropriate promotion of the model can play a stabilizing role in regulating the market economy.