A0B-1 C1 D-1或1

题目描述

-1

-1或1

答案解析

本题考查集合的特征。

集合的特征：确定性、互异性、无序性。

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​​​​​​​A0B-1 C1 D-1或1

题目描述

答案解析

相关试题

A0B-1 C1 D-1或1