题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133310-51443.png)
答案
解析
试题分析:A、是轴对称图形,不是中心对称图形,不符合题意;
B、是轴对称图形,也是中心对称图形,符合题意;
C、是轴对称图形,不是中心对称图形,不符合题意;
D、不是轴对称图形,也不是中心对称图形,不符合题意.
故选B.
核心考点
举一反三
A.矩形 | B.平行四边形 | C.角 | D.等边三角形 |
A.2个 | B.3个 | C.4个 | D.5个 |
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133300-61366.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133300-27956.png)
A.11 | B.10 | C.9 | D.8 |
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133247-95734.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133247-68484.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133247-68484.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133247-74257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133247-95734.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133248-31289.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133248-79935.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133248-98043.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133249-48337.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133247-95734.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133247-68484.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133248-31289.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133249-36379.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133249-80080.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133249-47476.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133249-72926.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133249-25275.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133250-77435.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133250-95191.png)
(1)如图1,当射线
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133249-72926.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133250-51188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133250-77435.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133250-51188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133250-56586.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133250-50142.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133247-68484.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133248-31289.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133250-78134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133251-18093.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133251-72210.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133251-72210.png)
(2)在(1)的条件下,设
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133251-34521.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133251-30431.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133251-30431.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133251-91397.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133240-13982.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133240-22720.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133241-13276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106133241-59318.png)
A B C D
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