题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012953-83787.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012953-17556.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012953-90168.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012954-51764.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012954-72019.png)
A.![]() |
B.平面![]() ![]() |
C.![]() ![]() |
D.![]() ![]() |
答案
解析
试题分析:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012956-77469.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012956-90528.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012956-57708.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012956-20542.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012957-41599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012955-90400.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012957-31920.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012956-20542.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012954-51764.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012957-55352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012955-56869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012957-55352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012956-84242.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012937-11720.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012937-86049.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012937-57449.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012937-40415.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012938-19023.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012938-29853.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012938-48742.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012938-22426.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012938-24696.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012938-33193.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012938-40287.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012939-38322.png)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012939-71190.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012939-20366.png)
(2)当三棱锥
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012939-75022.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012940-78768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012939-38322.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012940-64285.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012926-19279.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012926-32326.png)
A.若![]() ![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012907-74360.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012907-51796.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012908-73853.png)
(1)若M为PA中点,求证:AC∥平面MDE;
(2)求直线PA与平面PBC所成角的正弦值;
(3)在线段PC上是否存在一点Q(除去端点),使得平面QAD与平面PBC所成锐二面角的大小为
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012908-52568.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012850-96954.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012851-44828.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012851-93013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012851-89108.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012851-12458.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012851-99980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012851-34939.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012851-95328.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012852-71054.jpg)
(1)证明:面
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012852-95358.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012852-97665.png)
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012852-37717.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012851-95328.png)
(3)求二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106012852-23984.png)
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