人类与环境关系密切： 2．我们的环境面临着危机； 3．必须采取切实有效的措施保护环境。 Man and Environment—Problems and Solutions

A．Social change tends to meet with more difficulty in basic and emotional aspects of society.
B．Disagreement with and argument about conditions tends to slow down social change.
C．Social change is more likely to occur in the material aspect of society.
D．Social change is less likely to occur in what people learned when they were young.

A．two different societies
B．the necessity of social change
C．certain factors that determine the ease with which social changes occur
D．certain factors that promote social change