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边角边全等三角形演示课件,帮实习学校老师做的,懂action的交流,懂隐形按钮的下,都不懂的别下了,免得说是垃圾!-Corner Pin congruent triangles demonstration courseware, training schools to help teachers do, and understand the action exchanges, understand the stealth button, nothing under the other, so that was rubbish!