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10楼#
发布于：2015-08-05 09:39
zhouxiaoyu221：为什么相等啊回到原帖你不给我说题的条件，我怎么知道怎么证明啊 |
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![7天勇士[春]](https://bbs.jd100.com/attachment/medal/7b734d35544b9d3.png "7天勇士[春]"){kind=small}
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11楼#
发布于：2015-08-05 09:43
zhouxiaoyu221：初二数学书上的第三课呀！题目是《证明》什么意思？？？？？？回到原帖http://www.jd100.com/c2/ 去学习中心听基础课，新人可以免费可以试听。。。 |
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12楼#
发布于：2015-08-05 14:54
@zysxxw：谢谢你了
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