题目内容

Which of the following conditions will make a relation that is in first normal form to be in second normal form Ⅰ. every non-key attribute is functionally dependent on the full set of primary key attributes. Ⅱ. no non-key attributes exist in the relation. Ⅲ. the primary key consists of only one attribute.

A. Ⅰ only
B. Ⅰ and Ⅱ only
C. Ⅰ and Ⅲ only
D. any of them

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汽车用后视镜

在我国,国家劳动和社会保障部于2001年8月颁发了《心理咨询师职业资格标准》,明确规定了培训、资格考核条件等内容。

A. 对
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B. 33~36℃
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B. 1000ml
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D. 2500ml
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