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△ABC外接圆的圆心为O,两条边上的高的交点为H,,则实数m的值( ) A. B...
△ABC外接圆的圆心为O,两条边上的高的交点为H,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102756334215940/SYS201311031027563342159006_ST/0.png)
,则实数m的值( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102756334215940/SYS201311031027563342159006_ST/1.png)
B.2
C.1
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102756334215940/SYS201311031027563342159006_ST/2.png)
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B.
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