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本文主要是通过对几个实例正反两个方面的分析,找到了错误利用乘法原理的本质原因。并在此基础上提出了正确使用乘法原理必须遵循的基本原则和方法。
This article mainly through the positive and negative aspects of several examples of analysis, found the reason for the wrong use of the principle of multiplication. Based on this, the basic principles and methods that must be followed in applying the principle of multiplication are put forward.