题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225102-62840.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225102-41479.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225102-35835.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225103-92616.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225103-37442.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225103-19637.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225103-82402.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225104-52882.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225104-71705.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225103-19637.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225104-85802.jpg)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:由题意平面四边形ABCD中,AB=AD=CD=1,BD=
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225105-62402.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225106-79765.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225106-45725.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225107-75523.png)
核心考点
试题【如图,平面四边形中, ,,,将其沿对角线折成四面体,使平面平面,若四面体顶点在同一球面上,则该球的体积为( )A.B.C.D.】;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
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225047-48047.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225047-48533.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225048-98584.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225048-24794.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225048-20525.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225048-92170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225049-79815.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225049-96512.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225049-24404.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225049-83306.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225049-73518.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225050-12618.png)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225050-90287.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225050-58622.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225050-44882.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225050-85031.png)
(Ⅲ)证明:平面
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225051-34732.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225051-78994.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225030-36037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225030-89958.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225031-68643.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225031-98486.jpg)
(1)求直线
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225031-35002.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225031-59841.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225032-94667.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225032-97417.png)
(3)在棱
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225032-51282.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225032-78764.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225033-46274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225033-48370.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225033-29356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225024-45139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225024-83921.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225024-55013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225025-15447.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225025-56917.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225025-72562.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225025-35106.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020225014-67237.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020224957-19784.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020224958-39091.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020224958-36217.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020224958-82734.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020224958-48534.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020224958-67898.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020224959-88554.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020224959-24569.png)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020224959-50787.png)
(2)求二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020224959-42725.png)
最新试题
- 1 1902年,在北京的一家四合院内,一位祖籍香港岛、1880年曾移居台湾、1897年移居北京东交民巷的75岁
- 2人体的肌肉主要是有蛋白质构成的,但是骨骼肌、心肌、平滑肌的功能各不相同,这是由于 [ ]A.肌细胞形状不同B.在
- 3构建和谐文化,需要加强思想道德建设,是因为思想道德建设应该:①弘扬民族精神 ②以集体主义为重点和以诚实守信为原则③坚持以
- 4下图代表人体体液免疫的过程。相关叙述正确的是 [ ]A.细胞Ⅰ和细胞Ⅱ均能识别抗原 B.在①和⑨所在的阶段中,可
- 5如图:OM∥AB,点P由射线OM、线段OB及AB的延长线围成的阴影区域内(不含边界)。且,则实数对(x,y)可以是[
- 6下图是日本主要工业区的分布示意图,读图并结合所学知识回答下列问题。(1)图中数字所表示的工业区,其中①________,
- 7下列生活实例中;①交通道口的斑马线;②天上的彩虹;③体操的纵队;④百米跑道线;⑤火车的平直铁轨线.其中属于平行线的有(
- 8信宜市五年来城乡居民生活改善情况:注:恩格尔系数是指食物支出在家庭消费总支出中所占比重。一般来讲恩格尔系数高于60%就认
- 9函数f(x)=sinx-cosx的最大值为[ ]A.1B.C.D.2
- 10 The global energy crisis is approaching. What can we do? He
热门考点
- 1下列词语中加点的字,每对读音都不相同的一组是 A.剽悍∕镖局晕船∕酝酿
- 2——I cleaning my bedroom. It’s clean now.——Wow.When you
- 3如图所示,质量为m、长为L的直导线用两绝缘细线悬挂于OO’,并处于匀强磁场中。当导线中通以沿x负方向的电流I,且导线保持
- 4如图所示,将一定质量的气体密封在烧瓶内,烧瓶通过细玻璃管与注射器和装有水银的U形管连接,最初竖直放置的U形管两臂中的水银
- 5Anyway, the crowd around me were obviously enjoying their da
- 6若单项式﹣3am﹣4b3与b|n﹣1|a3是同类项,则mn=[ ]A.28B.﹣14C.28或﹣14D.以上都不
- 7我国河流冬季有无结冰期的分界线是[ ]A.长江B.秦岭—淮河C.黄河D.大别山
- 8如图,在△ABC中,AB=AC,AB的垂直平分线与AC所在的直线相交所得到锐角为40°,则∠EBC等于______°.
- 9下面的程序输出的结果=
- 10常温下,下列各组离子在指定溶液中能大量共存的是 [ ]A.饱和氯水中:Cl-、NO3-、Na+、CO32-B.c