扇形是（ ）图形．
A．轴对称
B．平移
C．旋转
D．以上答案都不对
如图：
由图可知：扇形是轴对称图形．
故选：A．
Dogs are too _____ to take care of.
A．difficult
B．more difficult
C．most difficult
D．the most difficult
把下列人物和相关的活动或事件联系起来。
