题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201343-13918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201343-49312.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201343-29273.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201343-97785.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201344-26850.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201344-93594.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201344-36548.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201345-74765.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201346-52914.png)
答案
解析
试题分析:设扇形所在的圆的半径为1,以
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201346-30768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201347-97082.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201347-48353.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201347-93657.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201347-23781.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201348-52154.png)
令
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201348-73442.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201348-13517.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201349-66807.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201348-13517.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201349-69333.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201348-13517.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201349-92761.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201348-13517.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201349-23455.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201350-31386.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201349-66807.png)
核心考点
试题【如图,在扇形中,,为弧上且与不重合的一个动点,且,若存在最大值,则的取值范围为( )A.B.C.D.】;主要考察你对空间向量的直角坐标运算等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201336-47214.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201336-49188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201336-21784.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201337-62250.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201337-13767.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201337-48958.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201331-70309.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201331-95380.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201324-84865.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201324-13370.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201324-37945.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201317-43851.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201317-58542.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201317-24660.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201317-94734.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201318-66163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201318-23342.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201318-30016.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201306-67218.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201306-12315.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201306-54195.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105201306-73933.png)
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