题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032215-41471.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032215-95096.jpg)
其中正确命题的序号是( )
A.①② | B.①③ | C.②③ | D.①②③ |
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032215-17332.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032215-80750.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032216-63319.png)
VA-BCD=
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032216-97612.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032215-17332.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032216-40574.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032216-63319.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032216-48282.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032217-87728.png)
核心考点
试题【如图,在棱长为4的正四面体A-BCD中,M是BC的中点,点P在线段AM上运动(P不与A,M重合),过点P作直线l⊥平面ABC,l与平面BCD交于点Q,给出下列命】;主要考察你对线线角等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032212-32431.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032203-31218.jpg)
(1)求证:AD⊥PB;
(2)求点E到平面PBC的距离.
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032153-15876.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032154-45996.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032154-50486.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032154-46303.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032154-99077.png)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032154-40869.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032155-74929.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032155-51307.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032155-20749.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032155-90241.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032155-81168.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032156-89021.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032142-61977.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032142-70839.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032143-59337.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032143-69591.jpg)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032143-82638.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032143-34267.png)
(2)求证:平面
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032144-73374.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032143-34267.png)
(3)求直线BE与平面
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032144-45948.png)
(1)求证:PC⊥BC;
(2)求点A到平面PBC的距离.
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022032134-56379.png)
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