题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032927-96652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032927-23072.png)
A.![]() ![]() ![]() |
B.![]() ![]() |
C.![]() ![]() ![]() |
D.![]() ![]() |
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032927-85892.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032928-39207.png)
核心考点
试题【在下列条件中,可判断平面与平面平行的是( )A.、都垂直于平面B.内存在不共线的三点到平面的距离相等C.是内两条直线,且D.是两条异面直线,且】;主要考察你对向量与空间位置关系等知识点的理解。[详细]
举一反三
如图,在直三棱柱
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032915-77607.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032915-84412.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032916-37526.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032916-72586.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032916-42556.png)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032917-79593.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032917-84279.png)
(2)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032917-47094.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032917-28470.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032918-55105.png)
如图,已知四棱锥
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032910-36913.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032910-60098.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032910-98986.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032910-98986.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032910-80763.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032911-57624.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032911-21389.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032911-75924.png)
(1)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032912-26544.png)
(2)在线段
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032912-92063.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032912-88688.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032912-37356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032913-16082.png)
指出点
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032912-88688.png)
如图,四棱锥
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032902-23598.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032902-73622.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032902-92430.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032902-88552.png)
是SD上的点,且
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032903-26148.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032903-41261.png)
(1)求证:对任意的
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032903-83996.png)
(2)若二面角C-AE-D的大小为
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032903-66826.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032904-41831.png)
如图所示,已知
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032853-96728.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032853-40931.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032853-41934.png)
(Ⅰ)求证:MN∥平面BCD;
(Ⅱ)求证:平面B CD
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032853-40931.png)
(Ⅲ)若AB=1,BC=
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032854-89958.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032849-90430.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032849-80366.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032849-74591.png)
①过M点有且只有一条直线与直线
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032849-82067.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032850-50006.png)
②过M点有且只有一条直线与直线
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032849-82067.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032850-50006.png)
③过M点有且只有一个平面与直线
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032849-82067.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032850-50006.png)
④过M点有且只有一个平面与直线
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032849-82067.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106032850-50006.png)
其中真命题是( )
A.②③④ | B.①③④ | C.①②④ | D.①②③ |
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