考点分析:
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已知点P是椭圆
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224517685169763/SYS201311012245176851697009_ST/0.png)
上的动点,F
1,F
2为椭圆的两个焦点,O是坐标原点,若M是∠F
1PF
2的角平分线上一点,且
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224517685169763/SYS201311012245176851697009_ST/1.png)
,则|OM|的取值范围是( )
A.(0,2
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]
B.
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C.[2
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)
D.[0,4]
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已知定点N(0,1),动点A,B分别在抛物线
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及曲线
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上,若B在A的上方,且AB∥y轴,则△ABN的周长l的取值范围是( )
A.(
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,2)
B.(
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)
C.(
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)
D.(
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)
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如果方程
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224517685169763/SYS201311012245176851697007_ST/0.png)
(p>0)表示双曲线,则下列椭圆中与该双曲线共焦点的是( )
A.
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B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224517685169763/SYS201311012245176851697007_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224517685169763/SYS201311012245176851697007_ST/3.png)
D.
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与y轴相切且和曲线x
2+y
2=4(0≤x≤2)内切的动圆的圆心的轨迹方程是( )
A.y
2=-4(x-1)(0<x≤1)
B.y
2=4(x-1)(0<x≤1)
C.y
2=4(x+1)(0<x≤1)
D.y
2=-2(x-1)(0<x≤1)
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当m∈[-2,-1]时,二次曲线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224517685169763/SYS201311012245176851697005_ST/0.png)
的离心率e的取值范围是( )
A.[
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]
B.[
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]
C.[
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]
D.[
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]
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