题目内容

实体有很多属性，其中能够区分同一实体的不同示例的属性可以作为主码。比如，“易烊千玺”是“明星”实体的一个实例。那么，“易烊千玺”的哪个属性作为主码比较合理呢？

A. 易烊千玺的身份证号码
B. 易烊千玺的微博账号
C. 易烊千玺的家乡（怀化）
D. 易烊千玺的生日

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更多问题

下面关于E-R图正确的是

A. 矩形表示“实体”
B. 菱形表示“联系”
C. 椭圆表示“属性”
D. 数字表示“联系之间的类型”

TranslationWe will build an educated, skilled, and innovative workforce, foster respect for model workers, promote quality workmanship, and see that taking pride in labor becomes a social norm and seeking excellence is valued as a good work ethic.

英汉互译River__________

Many a young person has the misconception that being a writer would bring them wealth and ____________, yet often they have little idea of the hard work and pressure that is involved.

A. storage
B. fame
C. agent
D. award