由0,1,2,这三个数字构成的三位数所组成的集合是( ) A:012,021,102,120,201,210 B:012,021,102,120,201,210

题目

由0,1,2,这三个数字构成的三位数所组成的集合是( ) A:012,021,102,120,201,210 B:012,021,102,120,201,210
C:102,120,201,210 D:(±102,±120,±201,±210)

答案