【多选】 新自由主义在经济理论上的核心主张包括（）。

A、some men started trembling
B、what frightened Picciotto most was how loud the noise was
C、it remained the same and didn"t get louder
D、Picciotto felt sure he could escape

A、密封类可以用作基类
B、密封类可以是抽象类
C、密封类永远不会有任何派生类
D、密封类或密封方法可以重写或继承