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如图,圆的直径是正方形边长的一半,圆位于正方形的内部.现随意地将飞镖掷向正方形内...
如图,圆的直径是正方形边长的一半,圆位于正方形的内部.现随意地将飞镖掷向正方形内,则镖击中圆面部分的概率是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102205841323646/SYS201311031022058413236027_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102205841323646/SYS201311031022058413236027_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102205841323646/SYS201311031022058413236027_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102205841323646/SYS201311031022058413236027_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102205841323646/SYS201311031022058413236027_ST/3.png)
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