As we all know, every minute _____ full use of ____ our lessons will do good to us students.

A．which makes; studying

B．when made; to study

C．that is made; study

D．that is made; studying

如果付出很大努力或代价，而客户的满意程度仍然很低，就是典型的( )。

A．功能偏离

B．成本偏离

C．满意度偏离

D．价值偏离