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在平面直角坐标系中,有一点在(0,0)、(2,0),(2,3)、(0,3)所围成...
在平面直角坐标系中,有一点在(0,0)、(2,0),(2,3)、(0,3)所围成的矩形内随机运动,那么它的横坐标小于纵坐标的概率是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103001134088665499/SYS201311030011340886654008_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103001134088665499/SYS201311030011340886654008_ST/1.png)
C.1
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103001134088665499/SYS201311030011340886654008_ST/2.png)
考点分析:
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如图,∠ABC=90°,O为射线BC上一点,以点O为圆心,BO长的一半为半径作⊙O,当射线BA绕点B按顺时针方向旋转一定的角度后与⊙O相切,则旋转的角度为(小于180°)( )
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D.
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C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103001134088665499/SYS201311030011340886654004_ST/images3.png)
D.
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