The role of school-related social networks for school leaving examination and...

Topics: I) Leisure time and social network: Composition of the social network of schoolmates; membership and frequency of activities in associations and other organizations;...主题：一、休闲时光与社交网络：在校同学社交网络的构成；各类协会及其他组织的成员身份与活动参与频次；……