______ is considered to be one of the characteristics of the Ame

______ is considered to be one of the characteristics of the American people.
A、Mobility
B、Stability
C、turbulence
D、motionless
【正确答案】：A
【题目解析】：Mobility is considered to be one of the characteristics of the American people.参加教材P187。
掌握“Population Movement(USA)”知识点。