【答案解析】Skyscrapers, speed way, cars and different kinds of electricity appliance all show that since the 1978's reform and opening, great changes have taken place in China. These are the changes people can see. However, underlying the material changes, there may be some other changes with more importance. Socialists find that as people's living standard improves, traditional life pattern and the perceptions are changing as well. Socialists are always concerning about these changes, from the evolution of family structure to the change of women' s social status, from people' s attitude to- ward marriage to the changes of consumption concept, and the income polarizing. All of these are the socialists' study subjects.