题目内容
（请给出正确答案）
[主观题]
●Which of the following statements about object oriented database is not correct？ （72) ．（7
●Which of the following statements about object oriented database is not correct？ (72) ．
(72) A．Each object has a unique object identify in the system
B．Encapsulation and inheritance are two important features of object oriented database
C．A subclass can inherit the attributes and methods of all its superclasses
D．A supereloss includes the attributes and methods at all subclasses
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