题盒微课-免费下载海量北京市区级优秀微课资源及配套资料
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对应线段
视频地址:
https://video.cache.bdschool.cn/vd/7d89b9fd289096396aea889cd3689e8a.mp4
北京市
初三数学
16
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Jul 15, 2021
一道线段成比例的题
用旋转观点看待辅助线的添加 -2
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