如图,在四棱锥P﹣ABCD中,PA⊥平面ABCD,四边形ABCD是平行四边形,且AC⊥CD,PA=AD,M,Q分别是PD,BC的中点.
![](https://img.xkw.com/dksih/QBM/2013/7/1/1571260096364544/1571260101410816/STEM/aacdc915880b480abd0a126db1dd1858.png)
(1)求证:MQ∥平面PAB;
(2)若AN⊥PC,垂足为N,求证:MN⊥PD.
![](https://img.xkw.com/dksih/QBM/2013/7/1/1571260096364544/1571260101410816/STEM/aacdc915880b480abd0a126db1dd1858.png)
(1)求证:MQ∥平面PAB;
(2)若AN⊥PC,垂足为N,求证:MN⊥PD.
2013·江苏徐州·一模 查看更多[2]
更新时间:2016-12-03 00:43:17
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