【已知,等腰三角形OAB中,角AOB=90,等腰直角三角形EOF中,角EOF=90,连接AE,BF.求证:AE⊥BF已知,在三角形ABC中,角A,角C的平分线分别交BC、AB于点D,E,AD与CE交于O点.若角B=90时探索OE与OD的长度关系.】
【选用各组中词的适当形式填空interesting,interested,amazing,amazed,surprise,surprising,worried,exciting,excitied,relaxed,surprised,expensive1.Itwasan____finishitoan_____match.2.Look!Theboysseemtobecometooconfidentand_______.3.She】