题目内容
用于比较具有不同度量衡单位的变异度的指标是
2021-10-11
A.极差
B.方差
C.标准差
D.变异系数
E.离均差平方和
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='25429' and id < 2141922 and id<>'2141922' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25429' and id > 2141922 and id<>'2141922' order by id asc limit 5