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【单选题】
下面有的叙述正确的是( ).A.
同的记录可以具有重复的主键值或空值
B.
个表中的主键可以是一个或多个字段
C.
一个表中主键只可以是一个字段
D.
中的主键的数据类型必须定义为自动编号或文本
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反馈参考答案：
举一反三
【单选题】听力原文：M: Susan, have you read the notice on the bulletin board? I've won the scholarship for the next semester. W: I knew you would. You certainly deserve it. Q: What does the woman mean? (17)
A.
His only son is dying.
B.
His mother died some time ago.
C.
He didn't look after his sick wife.
D.
He hasn't taken good care of his son.
【单选题】听力原文：M: Susan, have you read the notice on the bulletin board? I've won the scholarship for the next semester. W: I knew you would. You certainly deserve it. Q: what does the woman mean? (19)
A.
She is surprised at the news.
B.
She has also won a scholarship.
C.
She has confidence in him.
D.
She is not interested in the news.
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