加权最小二乘法
参考答案:
使得加权的残差平方和最小的求解参数估计式的方法。
----Little Daniel is watering the flowers! Why?
-----Well, I’m not feeling very well today—otherwise I it myself.
A.did
B.would do
C.have done
D.will have done
()可采用串料粉碎。
A.桃仁、酸枣仁
B.熟地黄、黄精
C.冰片、马钱子
D.朱砂、珍珠
E.樟脑、薄荷脑