移动平均法
参考答案：
处理对象是一组无规则波动的数据，处理以后可消除原始的无规则数据中的随机干扰成分，突出系列本身的固有规律。
Fred’s grandfather _______three years ago. He _______for three years.
A．died; died
B．was dead; died
C．died; has been dead
D．died; has died
大学生“村官”工作、（）比照本地乡镇从高校毕业生中新录用国家公务员试用期满后工资收入水平确定。
