问题
单项选择题
在"职工"数据表中有如下字段：工号、姓名、性别、年龄，关键字可定义为（）
A.工号
B.姓名
C.性别
D.年龄
答案
参考答案：A
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在"职工"数据表中有如下字段：工号、姓名、性别、年龄，关键字可定义为（）
A.工号
B.姓名
C.性别
D.年龄
参考答案：A
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