题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040820-98257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040821-65605.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040821-30617.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040822-61690.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040822-12573.png)
①若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040822-25935.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040822-69050.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040822-61572.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040823-58852.png)
②若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040823-91659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040823-31276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040823-44070.png)
③ 若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040824-16225.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040824-75943.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040823-91659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040824-85762.png)
④ 若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040824-23682.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040825-85126.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040823-91659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040824-85762.png)
其中错误命题的序号是( )
A.①④ | B.①③ | C.②③④ | D.②③ |
答案
解析
试题分析:若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040822-25935.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040822-69050.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040822-61572.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040823-58852.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040825-43518.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040823-91659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040823-31276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040823-44070.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040824-16225.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040823-91659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040825-75957.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040824-75943.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040824-85762.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040824-23682.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040825-85126.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040826-18246.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040826-84402.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040823-91659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040824-85762.png)
综上知选A.
核心考点
试题【设,是两条不同的直线,,,是三个不同的平面.有下列四个命题:①若,,,则;②若,,则;③ 若,,,则;④ 若,,,则.其中错误命题的序号是( )A.①④B.①】;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/20191022/20191022040759-74872.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040759-13479.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040759-74291.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040800-21199.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040800-76781.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040800-98670.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040800-12933.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040800-86994.png)
(1)求证:面
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040801-60191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040801-37722.png)
(2)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040801-43913.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040801-35816.png)
①平行于同一平面的两个不重合的平面平行;
②平行于同一直线的两个不重合的平面平行;
③垂直于同一平面的两个不重合的平面平行;
④垂直于同一直线的两个不重合的平面平行;
其中真命题的序号是________.
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040751-13872.jpg)
(1)求证:平面PAC⊥平面PCD;
(2)求证:CF∥平面BAE.
A.若m∥α,n∥α,则m∥n |
B.若m∥α,m∥β,则α∥β |
C.若m∥n,m⊥α,则n⊥α |
D.若m∥α,α⊥β,则m⊥β |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022040739-44315.jpg)
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