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The research object of pedagogy is the phenomenon and problem of human education, as
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更多“The research object of pedagog…”相关的问题
●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
A.Object obj[][]=new Object[][4]
B.Object obj[][]=new Object[][]{{},{},{}}
C.Object[][] bj=new Object[4][]
D.Object[][] bj=new Object[4][3]
A.Put Bucket
B.Head Object
C.Multipart Upload
D.Get Object
把一个对象写到一个流中相对比较简单，具体是通过调用ObjectOutputStream类的writeObject()方法实现的，那么该方法的定义为()。
A．public final int writeObject(Object obj) throws IOException
B．public final void writeObject(Object obj) throws IOException
C．public Object writeObject(Object obj) throws IOException
D．public final Object writeObject(Object obj) throws IOException
下述哪一个数据库系统属于第一代数据库系统（）。
A）SYBASE
B）Ingres
C）IMS
D）Object Store
