问题详情

下列表达式能将学生“罗军”的基本信息从学生关系中删除的是（）。

A．学生-{("s10","罗军","计算机","2000-04-20","男")}

B．学生÷{("s10","罗军","计算机","2000-04-20","男")}

C．学生∩{("s10","罗军","计算机","2000-04-20","男")}

D．π"罗军"(学生)