主文化
参考答案：
是一个社会中处于主导地位、一般由统治阶级倡导的文化体系。
When deciding which project to select，（）.
A．select the project with higher life cycle cost
B．select the project with lower life cycle cost
C．select the project with higher sunk cost
D．select the project with lower sunk cost
谈谈儿童兴趣发展的年龄特点。
