题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015545-76521.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015546-91323.png)
①若
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015546-42812.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015546-15383.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015546-66172.png)
②若直线m,n与平面
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015546-12902.png)
③存在异面直线m,n,使得m∥
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015546-12902.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015547-75560.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015546-12902.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015547-75560.png)
④若
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015547-62447.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015547-47826.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015547-51046.png)
A.1 | B.2 | C.3 | D.4 |
答案
解析
核心考点
试题【已知是三条不重合的直线, 是三个不重合的平面,下列四个命题正确的个数为 ( )①若, m∥②若直线m,n与平面所成的角相等,则m∥n;】;主要考察你对空间几何体的结构特征等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015539-22960.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015540-55020.gif)
已知三棱柱
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015519-69790.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015519-21670.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015519-30359.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015519-67003.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015519-29241.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015520-63571.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015520-62942.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015520-38727.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015520-62764.gif)
(1)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015521-97825.gif)
(2)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015521-85725.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015521-11376.gif)
(3)求二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015521-87627.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015522-11084.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015515-77230.jpg)
在四棱锥P-ABCD中,底ABCD是矩形, PA⊥面ABCD, AP="AB=2," BC=
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015506-89806.gif)
(1)求证: FG∥面ABCD
(2)求面BEF与面BAP夹角的大小.
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015506-45810.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015453-30556.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015453-74613.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015453-72908.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015453-76546.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015453-62465.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015453-37263.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015454-32434.gif)
(Ⅰ)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015454-33091.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015454-98344.gif)
(Ⅱ)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015454-66465.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015455-60044.gif)
(Ⅲ)求二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021015455-18221.gif)
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