题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131525-34069.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131525-90595.png)
A.与x、y都有关 | B.与x有关、与y无关 |
C.与x、y都无关 | D.与x无关、与y有关 |
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131526-15093.png)
答案
解析
试题分析:由题意得
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131526-39526.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131526-24276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131526-20259.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131527-79090.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131527-90140.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131527-41537.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131527-17588.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131527-36566.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131528-98494.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131528-87644.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131526-24276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131528-56730.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131526-39526.png)
核心考点
试题【如图,正方体ABCD-A1B1C1D1的棱长为2,动点E、F在BC1上,动点P、Q分别在AD1、CD上,若,,则四面体P-EFQ的体积( )A.与x、y都】;主要考察你对柱锥台的表面积等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131510-60599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131510-82365.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131510-34002.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131454-27685.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131455-22937.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131455-54856.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131455-22937.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131455-47449.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131455-19332.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131456-92843.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131456-80247.png)
(Ⅰ)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131456-20120.png)
(Ⅱ)在
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131456-64444.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131457-98467.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131457-69116.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131457-93122.png)
(Ⅲ)求三棱锥
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131457-74736.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131457-58818.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131444-49188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131444-67179.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131444-49188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131444-89764.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131444-87588.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131445-96298.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131445-30643.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131445-77015.png)
(Ⅰ)求证:平面
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131445-51959.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131446-13050.png)
(Ⅱ)求几何体
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131446-42348.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131433-92167.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131433-52797.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131434-37232.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131434-18448.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131434-42290.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131434-13846.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131434-54774.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131434-49842.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131434-25199.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131426-14940.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131426-58249.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131426-14940.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131427-35318.png)
① 有
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131427-43733.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131427-95682.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131427-43733.png)
④ 表面积为
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131427-91947.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131428-79922.png)
其中正确的结论是 (写出所有正确结论的编号).
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021131428-37104.png)
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