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如图,一圆形纸片的圆心为O,F是圆内一定点,M是圆周上一动点,把纸片折叠使M与F...
如图,一圆形纸片的圆心为O,F是圆内一定点,M是圆周上一动点,把纸片折叠使M与F重合,然后抹平纸片,折痕为CD,设CD与OM交于点P,则点P的轨迹是( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224857026885819/SYS201311012248570268858009_ST/images0.png)
A.椭圆
B.双曲线
C.抛物线
D.圆
考点分析:
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