从行为获得的途径来看,小狗经训练能到报亭给主人买报纸,这一行为属于( )
A:社会行为
B:学习行为
C:先天性行为
D:迁徙行为
如图,在矩形纸片ABCD中,已知AD=8,折叠纸片,使AB边与对角线AC重合,点B落在点F处,折痕为AE,且EF=3,则AB的长为( )
—I lost touch with my teachers after I graduated from high schoo1.
—I still my teachers from high schoo1.