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已知AC⊥BC于C,BC=a,CA=b,AB=c,下列选项中⊙O的半径为的是( ...
已知AC⊥BC于C,BC=a,CA=b,AB=c,下列选项中⊙O的半径为
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193815315844030/SYS201311011938153158440009_ST/0.png)
的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193815315844030/SYS201311011938153158440009_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193815315844030/SYS201311011938153158440009_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193815315844030/SYS201311011938153158440009_ST/images3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193815315844030/SYS201311011938153158440009_ST/images4.png)
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