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如图,C为⊙O直径AB上一动点,过点C的直线交⊙O于D,E两点,且∠ACD=45...
如图,C为⊙O直径AB上一动点,过点C的直线交⊙O于D,E两点,且∠ACD=45°,DF⊥AB于点F,EG⊥AB于点G,当点C在AB上运动时,设AF=x,DE=y,下列中图象中,能表示y与x的函数关系式的图象大致是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000805771693348/SYS201311030008057716933007_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000805771693348/SYS201311030008057716933007_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000805771693348/SYS201311030008057716933007_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000805771693348/SYS201311030008057716933007_ST/images3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000805771693348/SYS201311030008057716933007_ST/images4.png)
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