分母有理化:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddae19bb3afde7d149a7752f9e4c4ffc.png)
________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddae19bb3afde7d149a7752f9e4c4ffc.png)
2012·上海黄浦·二模 查看更多[4]
更新时间:2016-12-05 08:27:21
|