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在平面直角坐标系xOy中,F1,F2分别为椭圆的左、右焦点,B,C分别为椭圆的上...
在平面直角坐标系xOy中,F
1,F
2分别为椭圆
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102238572945164/SYS201311031022385729451011_ST/0.png)
的左、右焦点,B,C分别为椭圆的上、下顶点,直线BF
2与椭圆的另一个交点为D,若
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102238572945164/SYS201311031022385729451011_ST/1.png)
,则直线CD的斜率为( )
A..
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102238572945164/SYS201311031022385729451011_ST/2.png)
B..
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102238572945164/SYS201311031022385729451011_ST/3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102238572945164/SYS201311031022385729451011_ST/4.png)
D..
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102238572945164/SYS201311031022385729451011_ST/5.png)
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