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抛物线x2=-8y的准线方程是( ) A.y=2 B. C. D.y=-2
抛物线x
2=-8y的准线方程是( )
A.y=2
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224733605638705/SYS201311012247336056387006_ST/0.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224733605638705/SYS201311012247336056387006_ST/1.png)
D.y=-2
考点分析:
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