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高一数学解三角形难题破解！A=60°，AM=2MD=2，∠BMC=60°，求BC
高一数学解三角形难题破解！∠A=60°，AM=2MD=2，∠BMC=60°，求BC
新课程高考数学考题讲解及难重点分析，高三必备，免费视频合辑327/409
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