Rt三角形ABC中,角ACB=45度,角BAC=90度,AB=AC,D是AB的中点,AF垂直CD于H交BC于F BE平行AC交AF的延长线于E.在Rt三角形ABC中,角ACB=45度,角BAC=90度,AB=AC,点D是AB的中点,AF垂直CD于H交BC于F,BE平行AC交AF的延长线于E,
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