题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073302-16928.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073303-38358.gif)
⑴直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073303-95562.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073303-10080.gif)
⑵二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073303-76060.gif)
⑶求点
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073304-25352.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073304-88041.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073304-10452.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073302-16928.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073304-96500.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073304-10452.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073303-95562.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073303-10080.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073305-90919.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073303-95562.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073303-10080.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073305-35539.gif)
在
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073306-20661.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073306-89490.gif)
∴直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073306-40882.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073303-10080.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073307-78188.gif)
⑵过
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073307-95547.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073307-94066.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073307-13939.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073307-24858.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073308-67500.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073308-70368.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073308-52675.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073308-70942.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073308-39769.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073309-49565.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073309-48085.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073309-97155.gif)
在
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073309-66482.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073310-93870.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073310-83587.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073310-22590.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073311-10798.gif)
∴二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073309-97155.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073311-21946.gif)
⑶设点
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073304-25352.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073304-88041.gif)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073311-18153.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073311-10878.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073312-88007.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073312-33505.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073312-88919.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073304-25352.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073304-88041.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073312-88459.gif)
解析
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073257-93081.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073257-73873.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073257-93081.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073257-73873.gif)
②若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073257-93081.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073257-73873.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073258-42192.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073257-93081.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073257-73873.gif)
③若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073258-42192.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073258-15940.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073258-42192.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073258-15940.gif)
④若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073258-98021.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073258-64668.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073257-93081.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073258-42192.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073258-15940.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073257-73873.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073259-94933.gif)
⑤若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073258-98021.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073258-64668.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073258-15940.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073257-73873.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073257-93081.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073258-42192.gif)
⑥若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073258-64668.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073258-42192.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073257-73873.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073258-15940.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073259-87971.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073257-73873.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073250-17345.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073251-18178.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073251-16303.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073251-51612.gif)
(Ⅰ)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073251-82091.gif)
(Ⅱ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073251-64791.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073252-66794.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073252-71402.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073244-53858.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073245-13669.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073245-25445.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073245-96807.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073245-13669.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073245-63514.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073245-92769.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073246-79431.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073246-19592.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073246-93819.gif)
(
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073246-72322.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073247-39309.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073247-21524.gif)
(Ⅱ)证明:平面
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073247-73335.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073247-10177.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073248-51324.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073236-43894.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073237-32445.png)
①若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073237-80233.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073237-85508.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073237-64599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073238-50219.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073238-51999.png)
②若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073238-50219.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073238-51999.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073237-64599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073237-80233.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073237-85508.png)
③若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073238-53086.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073237-80233.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073238-85008.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073237-85508.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073238-93561.png)
其中真命题的个数为( )
A.3 | B.2 | C.1 | D.0 |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073227-99669.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073228-49155.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073228-95188.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073227-99669.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073228-54884.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073228-91468.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073228-52255.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073229-79226.gif)
(Ⅰ)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073229-72272.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073229-62445.gif)
(Ⅱ)求证:平面BCE⊥平面
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073229-54011.gif)
(III) 求此
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073230-68931.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022073230-19501.gif)
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