若y=（m﹣3）xm2-3m+2是二次函数，
（1）求m的值．
（2）求出该图象上纵坐标为﹣6的点的坐标．
— Did you hear the news about the fire in our building?
— Yes. It took the firemen two hours to_______ the fire.
组一组。
没：____、____
点：____、____
已知一组数据0，﹣1，1，2，3，则这组数据的方差为（ ）
