用完全初等的方法给出了梯形电阻网络等效电阻的通项公式，并对相关问题进行了讨论。
The general formula of the equivalent resistance of ladder type network are achieved with elementary method, and some relevant problems are discussed.
采用正则摄动法，求出了由有限项初等函数所构成的渐近解。
The asymptotic solutions composed of finite terms of elementary functions are obtained by regular perturbation method.
在《初等数学研究》课程中开展研究性学习，是一项前所未有的教学改革实践。
Adopting Inquiry Learning in Elementary Mathematics Study course is a new teaching reform.
在《初等数学研究》课程中开展研究性学习，是一项前所未有的教学改革实践。
Adopting Inquiry Learning in Elementary Mathematics Study course is a new teaching reform.
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