客户分析系统一般包括( )。

A．客户分类分析

B．交叉销售与增量销售分析

C．市场活动影响分析

D．客户联系时机优化分析

E．市场预测分析

______was Palmer's core methodological principle in language teaching and learning.

A．Stimulus and response

B．Habit-formation

C．Form and meaning

D．Meaning and situation