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已知圆C:(x-a)2+(y-2)2=4及直线l:x-y+3=0,当直线l被C截...
已知圆C:(x-a)
2+(y-2)
2=4及直线l:x-y+3=0,当直线l被C截得的弦长为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212110588994724/SYS201310232121105889947004_ST/0.png)
时,则a等于( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212110588994724/SYS201310232121105889947004_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212110588994724/SYS201310232121105889947004_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212110588994724/SYS201310232121105889947004_ST/3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212110588994724/SYS201310232121105889947004_ST/4.png)
考点分析:
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与
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