1. Introduction　　Nowadays, there are a large number of studies on gender difference in language use, however, most of ......

Forest ecosystems help conserve the quality of water resources in aquatic habitats.The conservation of biological divers......

通过对已有文献的分析发现:在总体上,青少年是我国网络成瘾的主要群体;我国青少年网络成瘾的人口学变量特征有男生高于女生、高中......