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如图,AB∥DC,AC交BD于点O.已知,BO=6,则DO= .
如图,AB∥DC,AC交BD于点O.已知
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101349169866842/SYS201311031013491698668023_ST/0.png)
,BO=6,则DO=
.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101349169866842/SYS201311031013491698668023_ST/images1.png)
考点分析:
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