A:①
B:②
C:③
D:④
如图,在△ABC中,∠C=90°,点D是BC边上一动点,过点B作BE⊥AD交AD的延长线于E.若AC=6,BC=8,则DEAD的最大值为( )
下列国家中地跨欧亚两洲的是( )
She in a toy factory, but now she has a shop of her own.