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shu xue qian neng zhi shi jing sai
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Pages: 62-63
Year: Issue:  Z1
Journal: School Journal of Mathematics
Keyword:  正方形; 知识竞赛; 数学潜能; 等腰直角三角形; 三角板; 拼成; 全等; 菱形; 边长; 观察与思考;
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