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抛物线的顶点坐标是( ) A.(2,-3) B.(2,3 C.(-2,3 D.(...
抛物线
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230742900128780/SYS201310212307429001287005_ST/0.png)
的顶点坐标是( )
A.(2,-3)
B.(2,3
C.(-2,3
D.(-2,-3
考点分析:
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