已知点O(0，0)，点A(4，-1)，且它们到直线mx+m2y+6=0的距离相等，那么m可取值的集合为______．
参考答案：{ -2，4，6}
It was reported that the problem had been settled without much .
A．affect
B．affair
C．effect
D．effort
吊销违法者的经营许可证是行政处罚。( )
