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【简答题】
数据库领域中主要的逻辑数据模型,除了面向对象数目模型,对象关系数据模型,半结构化数据模型外,还有其他三个模型,分别是:层次模型,________,________。
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反馈参考答案：
举一反三
【单选题】We thought it was he who did it, but it _________ that he wasn’t even there.
A.
turned up
B.
turned down
C.
turned off
D.
turned out
【简答题】Practice 3-Part 1.doc Answer Sheet.doc
【简答题】unit 1 -Part 1 作业.doc
【单选题】Was it a he or a she(Paragraph 2) may be replaced by
A.
Who did it.
B.
Who was the person who wrote it.
C.
Did he or she write it.
D.
Was it written by a man or a women.
【简答题】Part 1 Details.doc
【简答题】Unit 3 Part 1 - 副本.doc
【简答题】常值系统误差
【简答题】常值系统误差
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