审查施工预算的方法中，重点抽查法是抓住工程预算中的重点进行审查的方法，其审查的重点，一般是( )。

A．工程量较小的工程

B．造价较高的工程

C．工程结构复杂的工程

D．计取的各项费用

E．补充单位估价表

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