Chrome，
QQ浏览器
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
![《线段的垂直平分线》优质课公开课 北师大版数学八年级下册 教师获奖公开课 比赛课课堂实录（配套PPT课件教案）[白老师]【市一等奖】](//imgshow.1ydt.com/img?url=%2F%2Fi1.hdslb.com%2Fbfs%2Farchive%2F77743fa500fd716fe8318865a765b4beeaec900c.jpg%40672w_378h_1c_%21web-search-common-cover)
-
-
-
-
-
-
-
-
-
-
-
播放：25 时间：2024-06-19简介： -
-
-
-
-
-
-
-
-
-
-
-
-
-
![《线段的垂直平分线》优质课公开课 北师大版数学八年级下册 教师获奖公开课 比赛课课堂实录（配套PPT课件教案）[白老师]【市一等奖】](http://imgshow.1ydt.com/img?url=%2F%2Fi1.hdslb.com%2Fbfs%2Farchive%2F77743fa500fd716fe8318865a765b4beeaec900c.jpg%40672w_378h_1c_%21web-search-common-cover)
.