She_______ Japanese when she was in Japan. Now she can speak it freely.
A:picked out
B:picked up
C:made out
D:made up
已知角x的终边上一点坐标为sin5π6,cos5π6,则角x的最小值为( )
已知:如图所示,以梯形ABCD的对角线AC及腰AD为邻边作平行四边形ACED,连接EB,DC的延长线交BE于F.求证:EF=BF.
如图中A、B、C、D四幅图解释合理的是