题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072303-20639.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072304-92927.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072304-73550.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072304-33767.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072304-56883.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072305-57543.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072305-95855.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072305-20276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072305-91245.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072306-28166.png)
(1) 求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072306-74183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072306-51248.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072306-64664.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072306-74183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072307-25217.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072306-74183.png)
(2) 设
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072307-28550.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072307-92704.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072303-20639.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072304-92927.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072308-96012.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072306-74183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072308-19462.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072308-93600.png)
证明:(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072309-77103.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072304-73550.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072309-63599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072304-33767.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072304-56883.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072305-57543.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072305-95855.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072305-20276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072305-91245.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072306-28166.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072309-53189.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072309-95171.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072310-17216.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072304-73550.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072304-33767.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072304-56883.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072305-57543.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072310-72433.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072310-99135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072306-74183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072310-32321.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072306-74183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072310-95045.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072306-74183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072311-71521.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072306-74183.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072311-92180.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072306-74183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072311-15685.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072311-64449.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072312-65730.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072312-39452.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072312-21332.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072306-74183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072312-23274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072313-35307.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072306-74183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072313-31608.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072313-14519.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072313-53473.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072314-95792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072314-55768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072314-18138.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072311-64449.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072311-15685.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072308-96012.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072308-96012.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072306-74183.png)
解析
核心考点
试题【(本题满分13分)如图,线段,所在直线是异面直线,,,,分别是线段,,,的中点.(1) 求证:共面且面,面;(2) 设,分别是和上任意一点,求证:被平面平分. 】;主要考察你对线线角等知识点的理解。[详细]
举一反三
且a⊥α,b⊥β,则下列命题中为假命题的是
A.若a∥b,则α∥β |
B.若α⊥β,则a⊥b |
C.若a,b相交,则α,β相交 |
D.若α,β相交,则a,b相交 |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072252-56105.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072252-67428.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072253-55989.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072253-91494.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072253-55989.png)
①
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072253-92050.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072253-99099.png)
②
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072253-92050.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072253-52041.png)
③
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072253-92050.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072254-79233.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072253-99099.png)
④
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072253-92050.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072254-16827.png)
其中能成为增加条件的是_____________.(把你认为正确的条件的序号都填上)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072254-22068.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072242-79505.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072242-30626.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072242-52125.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072242-76451.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072242-27734.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072242-40296.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072243-76652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072243-13261.png)
(Ⅰ)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072243-67780.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072243-62260.png)
(Ⅱ)求圆锥
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072242-79505.png)
(Ⅲ)求异面直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072243-67780.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072243-29035.png)
(Ⅰ)求证:AC⊥平面SBD;
(Ⅱ)若E为BC中点,点P在侧面△SCD内及其边界上运动,并保持PE⊥AC,试指出动点P的轨迹,并证明你的结论.
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022072236-11028.png)
A.30° | B.45° | C.60° | D.90° |
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