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如图,△ABC中,AD⊥BC于D,BE⊥AC于E,AD与BE相交于点F,若BF=AC,则∠ABC的大小是 .
如图,△ABC中,AD⊥BC于D,BE⊥AC于E,AD交BE于F,BF=AC,则∠ABC等于( )
A.40° B.45° C.60° D.30°