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【单选题】
在数据库技术的发展历程中，以面向对象模型为主要特征的数据库系统属于第（）代A.
一
B.
二
C.
四
D.
三
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反馈参考答案：
举一反三
【简答题】土壤凋萎系数(名词解释)
【单选题】Do not______the watch to the relieving officer until he has verbally expressed his acknowledgment of the information which has been passed by the officer handing over．
A.
turn over
B.
hand over
C.
hands off
D.
take over
【简答题】For example, when a person says “ You have left the door open”, _______ performed by the speaker is that by such an utterance he has expressed his intention of speaking, i.e. asking someone to ...
【单选题】What is the perimeter of a rectangle whose length is three times its width and whose area is 12 square centimeters?
A.
18 centimeters
B.
16 centimeters
C.
15 centimeters
D.
8 centimeters
E.
4 centimeters
【简答题】He has expressed a/an__________ to see you.
【简答题】凋萎系数（或凋萎点）
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