烧结料造球是为了增加混合料的透气性,强化(),提高烧结矿的产质量。
参考答案:烧结过程
Mike likes sports very much. He loves . [ ]
A. to play the football
B. playing the football
C. to play football
D. playing football
描述一组偏峰分布资料的变异度,较好的指标是()
A.全距(R)
B.标准差(S)
C.变异系数(CV)
D.四分位数间距(Qu-Ql)
E.方差(S2)