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在中学化学教学中，通常利用各反应方程式组的计算比较麻烦，且准确率较低。本文就该问题，介绍一种高效、准确的计算方法——直接配平法。
In the middle school chemistry teaching, the calculation of each group of reaction equations is usually troublesome, and the accuracy is low. This article on the issue, introduced an efficient and accurate method of calculation - direct grading method.