酸溶法溶解试样就是利用酸的（）性（）性和（）性使试样中被测组分溶入溶液.

Which of the following statements about object oriented database is not correct

A．Each object has a unique object identity in the syste

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 superclass includes the attributes and methods of all its subclasses