2025年教学资料:第1章 集合(单元测试)(解析版)
第1章集合(单元测试)一、单项选择题(在每小题给出的四个选项中,只有一项是符合题目要求的)1.下列各组对象不能构成集合的是( )A.上课迟到的学生B.2023年高考数学难题C.所有有理数D.小于的正整数【答案】B【分析】由集合定义分别判断是否满足集合中元素的性质即可得出结论.【详解】根据集合中元素的确定性可知,“2023年高考数学难题”中的“难题”没有评判标准,不具备确定性,因此不能构成集合.故选:B2.若,则集合P中元素的个数是( )A.1B.2C.3D.4【答案】B【分析】由集合的表示可解.【详解】集合P中元素为,共2个.故选:B3.下列所给关系正确的个数是( )①;②;...
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