下列集合关于所给定的运算成为群的是（　） -题库考试答案搜索网

下列集合关于所给定的运算成为群的是（　）

单选题

2021-09-01 20:46

A、已给实数a的正整数次幂的全体，且a属于 {0，1，-1}，关于数的乘法
B、所有非负整数的集合，关于数的加法
C、所有正有理数的集合，关于数的乘法
D、实数集，关于数的除法

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正确答案

C

试题解析

标签：联大河南理工大学计算机科学与技术离散数学

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