角色扮演最早是由（）提出的。
参考答案：米德
由四条边围成的图形叫正长方形______．
The January Anomaly, the neglected firm effect, and the book value/market value ratio are studies examining which form of the EMH（）
A. Weak-form of the EMH.
B. Strong-form of the EMH.
C. Semip-form of the EMH.
