选择题:若A1单元格的内容为60,在A2单元格中输入公式“=IF(A1<60,"C",IF(A1<90,"B

题目内容:
若A1单元格的内容为60,在A2单元格中输入公式“=IF(A1<60,"C",IF(A1<90,"B","A"))”并确定,则A2单元格的内容为
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