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【单选题】
I don’t like fruits. I ______ eat them.A.
always
B.
often
C.
hardly ever
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举一反三
【单选题】Union compatible relations are those that have :
A.
the same number of attributes, where each pair of corresponding attributes shares the same domain
B.
the same domains for attributes
C.
the same degree (number of attributes)
D.
the same cardinality(number of rows) and the same domains for attributes
【简答题】A．easy B．flexible C．reflective D．compatible
【简答题】A．easy B．flexible C．reflective D．compatible
【简答题】( ):微命令用数字代码的形式表示。
【单选题】 When two or more tables share the same number of columns, and when their corresponding columns share the same or compatible domains, they are said to be _____.
A.
intersect-compatible
B.
union-compatible
C.
difference-compatible
D.
select-compatible
【简答题】A．easy B．flexible C．reflective D．compatible
【简答题】The couple vowed at the wedding ceremony that they would never p_____ no matter what would happen in their life.
【简答题】The couple vowed at the wedding ceremony that they would never no matter what would happen in their life.
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