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在Rt△ABC中,∠A=90°,∠B=60°,AB=1,若圆O的圆心在直角边AC...
在Rt△ABC中,∠A=90°,∠B=60°,AB=1,若圆O的圆心在直角边AC上,且与AB和BC所在的直线都相切,则圆O的半径是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231432347835548/SYS201311012314323478355008_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231432347835548/SYS201311012314323478355008_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231432347835548/SYS201311012314323478355008_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231432347835548/SYS201311012314323478355008_ST/3.png)
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