已知集合,,则A∩B中元素的个数为(    ) A. 2            

已知集合,则AB中元素的个数为(   

A. 2                                   B. 3                                   C. 4                                   D. 5

答案

B

【解析】

【分析】

采用列举法列举出中元素的即可.

【详解】由题意,,故中元素的个数为3.

故选:B

【点晴】本题主要考查集合交集运算,考查学生对交集定义的理解,是一道容易题.

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