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初中数学：怎么求AB²+CD²的值？勾股定理基础题，2020雅安中考
初中数学：怎么求AB²+CD²的值？勾股定理基础题，2020雅安中考
初中数学，直角三角形，勾股定理及逆定理，基础训练，培优专题128/169
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