题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031357-48061.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031358-64370.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031358-10043.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031358-41845.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031358-37329.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031359-40018.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031359-74271.gif)
解析
核心考点
试题【把边长为的正方形沿对角线折成直二面角,折成直二面角后,在四点所在的球面上,与两点之间的球面距离为.】;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
(1)有两组对边相等的四边形是平行四边形 (2)四边相等的四边形是菱形
(3)平行于同一条直线的两条直线平行 (4)有两边及其夹角对应相等的两个三角形全等
A. 1 | B. 2 ![]() | C. 3 | D. 4 |
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031344-95288.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031344-87961.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031344-44835.jpg)
(Ⅰ)证明:平面
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031344-23009.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031345-19789.gif)
(Ⅱ)设AB=
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031345-76489.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031344-95288.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031344-87961.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031345-22155.gif)
(i)当点C在圆周上运动时,求
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031345-22155.gif)
(ii)记平面
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031345-55014.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031346-53535.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031346-53107.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031346-50400.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031345-22155.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031346-76569.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031339-54164.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031339-34814.gif)
(II)求CC1到平面A1AB的距离;
(理)(III)求二面角A—A1B—C的大小
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031328-98451.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031328-86416.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031328-15464.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031328-48308.gif)
四边形DCBE为平行四边形,DC
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031329-10366.gif)
(1)求三棱锥C-ABE的体积;
(2)证明:平面ACD
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031329-10366.gif)
(3)在CD上是否存在一点M,使得MO//平面ADE?证明你的结论.
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031329-82530.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031324-56043.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031325-73796.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021031325-56659.gif)
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