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设△ABC是等腰三角形,∠ABC=120°,则以A,B为焦点且过点C的双曲线的离...
设△ABC是等腰三角形,∠ABC=120°,则以A,B为焦点且过点C的双曲线的离心率为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231432347170101/SYS201311012314323471701011_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231432347170101/SYS201311012314323471701011_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231432347170101/SYS201311012314323471701011_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231432347170101/SYS201311012314323471701011_ST/3.png)
考点分析:
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