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圆x2+y2=4截直线所得的弦长是( ) A.2 B.1 C. D.
圆x
2+y
2=4截直线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743483599/SYS201311031027297434835002_ST/0.png)
所得的弦长是( )
A.2
B.1
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743483599/SYS201311031027297434835002_ST/1.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743483599/SYS201311031027297434835002_ST/2.png)
考点分析:
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743483599/SYS201311031027297434835000_ST/images0.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743341123/SYS201311031027297433411021_ST/0.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102729743341123/SYS201311031027297433411020_ST/0.png)
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