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如图,在△ABC中,DE∥BC,DE分别与AB,AC相交于点D,E,若AD=4,...
如图,在△ABC中,DE∥BC,DE分别与AB,AC相交于点D,E,若AD=4,DB=2,则DE:BC的值为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101719103141826/SYS201311031017191031418007_ST/images0.png)
A.
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B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101719103141826/SYS201311031017191031418007_ST/1.png)
C.
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D.
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