It is a difficult thing for our student to draw a block digram according to a principle digram,the difficulties are analysed and some good methods are also given in this article.
以一道题,绘制图时难点进行了较深入分析,给出了克服困难方法.
It is a difficult thing for our student to draw a block digram according to a principle digram,the difficulties are analysed and some good methods are also given in this article.
以一道题,绘制图时难点进行了较深入分析,给出了克服困难方法.
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