平面体系几何组成分析是结构力学教学的重点和难点，初学者总感到抽象难懂。
The analysis of plane geometric composition is a emphasis and difficult point of teaching, it is abstract and complicated for the beginner.
几何组成分析在结构力学中是重点，常应用于求解超静定结构，文章用几何组成对力法、位移法和力矩分配法进行了分析。
Geometric composition analysis is focal point in structural mechanics and often used in finding the solution of statically indeterminate structure.
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