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在矩形ABCD中,AB=4,BC=2(如图所示),随机向矩形内丢一粒豆子,则豆子...
在矩形ABCD中,AB=4,BC=2(如图所示),随机向矩形内丢一粒豆子,则豆子落入圆内的概率是( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225811699831682/SYS201311012258116998316009_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225811699831682/SYS201311012258116998316009_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225811699831682/SYS201311012258116998316009_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225811699831682/SYS201311012258116998316009_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225811699831682/SYS201311012258116998316009_ST/3.png)
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