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【单选题】
以下是信息世界的模型,且实际上是现实世界到机器世界的一个中间层次的是( )。A.
数据模型
B.
E-R图
C.
关系模型
D.
概念模型
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反馈参考答案：
举一反三
【单选题】Human mind can respond quickly to what is before it, and by the same token can call up from within a host of appropriate ideas.
A.
as a similar symbol
B.
for the same reason
C.
at the same time
D.
by the same means
【单选题】Table tennis is easy to learn, and, by the same token, boys don't need a lot of space to practice it.
A.
by the same rule
B.
symbolically
C.
moreover
D.
by logic
【单选题】We must the right place to park the car.
A.
look at
B.
look up
C.
look after
D.
look for
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