题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012748-70292.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012748-72097.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012748-39944.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012748-22060.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012749-71339.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012749-79306.png)
(1)写出图中
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012748-39944.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012748-22060.png)
(2)求直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012749-17599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012749-42815.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012749-16535.jpg)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012748-72097.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012750-59927.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012750-26524.png)
(2)答案:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012750-43133.png)
解析
核心考点
举一反三
A.300 | B.450 | C.600 | D.900 |
(1)求证:平面PAC⊥平面NEF;
(2)若PC∥平面MEF,试求PM∶MA的值;
(3)当M的是PA中点时,求二面角M-EF-N的余弦值.
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012732-70270.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012720-41241.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012721-57550.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012721-85293.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012721-13141.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012721-54379.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012722-85139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012722-34871.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012722-42165.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012722-86719.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012722-26905.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012723-14114.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012723-97465.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012723-75743.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012723-99934.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012714-31134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012714-40518.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012715-93652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012715-56508.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012654-22944.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012654-49379.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012654-49379.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012654-89589.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012655-63007.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012655-39112.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012655-54020.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012655-40569.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012655-57035.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012656-29520.png)
(1)求异面直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012656-34276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012656-78562.png)
(2)在线段
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012656-29520.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012656-12551.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012656-66155.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012657-83546.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012657-93855.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012657-90879.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022012657-24515.png)
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