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本文通过引入内力正负值的八个概念,使教师讲解截面法计算构件内力时更易于学生理解,便于学生运用截面法。
In this paper, by introducing the eight concepts of positive and negative internal forces, teachers can make it easier for students to understand when explaining the internal forces of the member by the cross-sectional method so that students can use the cross-sectional method.