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直线与圆O:x2+y2=4交于A、B两点,则=( ) A.2 B.-2 C.4 ...
直线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102420930518264/SYS201311031024209305182009_ST/0.png)
与圆O:x
2+y
2=4交于A、B两点,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102420930518264/SYS201311031024209305182009_ST/1.png)
=( )
A.2
B.-2
C.4
D.-4
考点分析:
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