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抛物线y=4x2的准线方程为( ) A.y=- B.y= C.y= D.y=-
抛物线y=4x
2的准线方程为( )
A.y=-
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101901835387179/SYS201311031019018353871000_ST/0.png)
B.y=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101901835387179/SYS201311031019018353871000_ST/1.png)
C.y=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101901835387179/SYS201311031019018353871000_ST/2.png)
D.y=-
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103101901835387179/SYS201311031019018353871000_ST/3.png)
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