选择题:某班对50名学生进行体检,有20人近视,12人超重,4人既近视又超重。该班有(  )既不近视又不超重。A.22人 B.24人 C.26人 D.28人

题目内容:

某班对50名学生进行体检,有20人近视,12人超重,4人既近视又超重。该班有(  )既不近视又不超重。

A.22人 B.24人 C.26人 D.28人

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