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有5张形状、大小、质地均相同的卡片,背面完全相同,正面分别印有等边三角形、平行四...
有5张形状、大小、质地均相同的卡片,背面完全相同,正面分别印有等边三角形、平行四边形、菱形、等腰梯形和圆五种不同的图案.将这5张卡片洗匀后正面朝下放在桌面上,从中随机抽出一张,抽出的卡片正面图案是中心对称图形的概率为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161600200395985/SYS201310221616002003959005_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161600200395985/SYS201310221616002003959005_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161600200395985/SYS201310221616002003959005_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161600200395985/SYS201310221616002003959005_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022161600200395985/SYS201310221616002003959005_ST/3.png)
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D.
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4
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