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过点P(-1,3)且垂直于直线x-2y+3=0的直线方程为 .
过点P(-1,3)且垂直于直线x-2y+3=0的直线方程为 .
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已知点P是抛物线y
2=2x上的一个动点,则点P到点(0,2)的距离与P到该抛物线准线的距离之和的最小值为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224318610199899/SYS201311012243186101998011_ST/0.png)
B.3
C.
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D.
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已知F
1,F
2是双曲线的两个焦点,PQ是经过F
1且垂直于实轴的弦,若△PQF
2是等腰直角三角形,则双曲线的离心率为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224318610199899/SYS201311012243186101998010_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224318610199899/SYS201311012243186101998010_ST/1.png)
+1
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224318610199899/SYS201311012243186101998010_ST/2.png)
-1
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224318610199899/SYS201311012243186101998010_ST/3.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224318610199899/SYS201311012243186101998009_ST/0.png)
+y
2=1的两个焦点为F
1、F
2,过F
1作垂直于x轴的直线与椭圆相交,一个交点为P,则|PF
2|等于( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224318610199899/SYS201311012243186101998009_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224318610199899/SYS201311012243186101998009_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224318610199899/SYS201311012243186101998009_ST/3.png)
D.4
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过点(0,1)作直线,使它与抛物线y
2=4x仅有一个公共点,这样的直线有( )
A.0条
B.1条
C.2条
D.3条
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若双曲线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224318610199899/SYS201311012243186101998007_ST/0.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224318610199899/SYS201311012243186101998007_ST/1.png)
=1(a>0)的离心率为2,则a=( )
A.2
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224318610199899/SYS201311012243186101998007_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224318610199899/SYS201311012243186101998007_ST/3.png)
D.1
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