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(2008•大庆)如图,将非等腰△ABC的纸片沿DE折叠后,使点A落在BC边上的...
(2008•大庆)如图,将非等腰△ABC的纸片沿DE折叠后,使点A落在BC边上的点F处.若点D为AB边的中点,则下列结论:①△BDF是等腰三角形;②∠DFE=∠CFE;③DE是△ABC的中位线,成立的有( )
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A.①②
B.①③
C.②③
D.①②③
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