题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024132-62283.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024132-19989.png)
A.若![]() | B.若![]() ![]() |
C.若![]() | D.若![]() ![]() |
答案
解析
试题分析:若
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024133-64177.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024134-81538.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024132-62283.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024132-96093.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024132-62283.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024133-85672.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024134-19700.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024133-85672.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024123-96386.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024123-75287.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024123-35574.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024123-79540.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024123-41771.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024123-68663.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024124-81814.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024123-68663.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024123-41771.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024124-21749.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024105-29379.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024105-45475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024105-51040.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024106-96048.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024106-56076.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024106-88378.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024106-94590.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024107-75751.png)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024107-25968.png)
(2)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024107-71144.png)
(3)求二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024107-28078.png)
A.m∥α,n∥α | B.m⊥α,n⊥α |
C.m∥α,n⊂α | D.m、n与α所成的角相等 |
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024049-30480.png)
(1)求证:B1D1∥平面A1BD;
(2)求证:MD⊥AC;
(3)试确定点M的位置,使得平面DMC1⊥平面CC1D1D.
①
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024041-60100.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024041-59664.png)
③
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024041-14261.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024041-17324.png)
⑤
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106024041-32462.png)
其中真命题的序号是__________________________(把所有真命题的序号都填上)
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