题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045558-19879.png)
①
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045559-88969.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045559-49516.png)
③
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045559-56252.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045559-85578.png)
答案
解析
试题分析:①中两直线可异面,①错误;②中两直线若平行,则两平面可以平行,②错误;③中直线m可平行于平面
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045600-17987.png)
点评:立体几何的题目,对空间想象能力要求较高。解决此类题目,可用笔和桌面代替直线和平面对所描述的情况进行模拟,进而做出判断。
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045551-15344.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045551-52005.jpg)
(1)求证:平面ABCD丄平面ADE;
(2)求四面体BADE的体积;
(3)试判断直线OB是否与平面CDE垂直,并请说明理由.
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045537-67864.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045537-85129.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045538-76699.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045538-35908.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045537-85129.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045538-68286.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045538-69745.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045537-85129.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045538-77063.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045538-68683.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045538-41702.png)
(Ⅰ)求证:平面
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045538-28923.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045538-88675.png)
(Ⅱ)求直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045537-67864.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045538-88675.png)
(Ⅲ)当
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045538-83763.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045539-16792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045539-55705.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045539-98622.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045519-64042.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045519-68674.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045520-95117.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045520-67524.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045519-68674.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045520-26217.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045520-15992.jpg)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045521-93121.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045521-59614.png)
(2)线段
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045521-60892.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045521-77871.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045522-43075.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045522-76042.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045522-85336.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045512-57601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045512-98631.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045512-68100.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045513-62997.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045513-98631.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045513-76923.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045513-35567.png)
(Ⅰ)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045513-93495.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045514-15317.png)
(Ⅱ)求异面直线BS与AC所成角的大小.
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045507-92789.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045507-77822.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045507-34313.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045508-99374.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045508-65117.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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