一组数据中出现次数最多的那个数值是( )。
A.平均数
B.众数
C.极差
D.标准差
参考答案:B
心肌超声造影主要用于()
A.检测心肌梗死部位
B.判断心肌存活与否
C.评价介入治疗疗效
D.显示心肌细胞
E.检测心肌缺血区
The man didn’t admit _________ anything at the store, when he was questioned by the police.
A.to steal
B.having stolen
C.to have stolen
D.having been stolen