首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1487篇
  免费   75篇
各国政治   94篇
工人农民   68篇
世界政治   114篇
外交国际关系   114篇
法律   819篇
中国政治   12篇
政治理论   331篇
综合类   10篇
  2023年   22篇
  2022年   26篇
  2021年   17篇
  2020年   41篇
  2019年   60篇
  2018年   51篇
  2017年   78篇
  2016年   81篇
  2015年   50篇
  2014年   71篇
  2013年   217篇
  2012年   68篇
  2011年   48篇
  2010年   49篇
  2009年   46篇
  2008年   56篇
  2007年   74篇
  2006年   58篇
  2005年   61篇
  2004年   43篇
  2003年   41篇
  2002年   49篇
  2001年   24篇
  2000年   22篇
  1999年   26篇
  1998年   14篇
  1997年   14篇
  1996年   9篇
  1995年   15篇
  1994年   10篇
  1993年   3篇
  1992年   22篇
  1991年   7篇
  1990年   6篇
  1989年   11篇
  1988年   8篇
  1987年   6篇
  1986年   7篇
  1985年   7篇
  1984年   3篇
  1983年   7篇
  1982年   4篇
  1981年   2篇
  1980年   4篇
  1975年   3篇
  1973年   3篇
  1969年   4篇
  1966年   3篇
  1962年   1篇
  1955年   1篇
排序方式: 共有1562条查询结果,搜索用时 15 毫秒
921.
922.
Although peer victimization is of major concern and adolescents spend increasing amounts of time on the Internet, relatively little is known about the psychosocial antecedents and consequences of online victimization. The main aim of this study was to compare the psychosocial antecedents and consequences of online versus real-life victimization. More specifically, the bidirectional relationship between online and real-life victimization on the one hand and psychosocial problems (i.e., loneliness and social anxiety) on the other was examined. In addition, the moderating role of online aggression in the relationship between online victimization and subsequent psychosocial problems was studied. This prospective study, consisting of three annual measurements, was conducted among a sample of 831 adolescents (50.3 % girls) aged 11–15, of which most (80.2 %) had a Dutch ethnic background. The results indicate a unidirectional relationship whereby loneliness and social anxiety predict an increase in latter online victimization rather than the reverse. A bidirectional relationship was found for real-life victimization: loneliness (but not social anxiety) predicted an increase in latter real-life victimization, which in turn predicted an increase in subsequent social anxiety (but not loneliness). No moderating effects of online aggression were found. The findings of the present study suggest that negative online and in real life peer interactions have a differential meaning for, and impact on adolescents’ well-being.  相似文献   
923.
International development cooperation is undergoing fundamental changes. New – or often re-emerging – actors have gained importance during the past two decades, and are increasingly challenging the traditional approach to development cooperation associated with the members of the Development Assistance Committee of the oecd. Their supposedly alternative paradigm, ‘South–South cooperation’ (ssc), has been recognised as an important cooperation modality, but faces contradictions that are not too different from those of its North–South counterpart. ssc providers are highly heterogeneous in terms of policies, institutional arrangements, and engagement with international forums and initiatives. This article contributes to current debates on ssc by mapping the diversity of its actors – based on illustrative case studies from the first and second ‘wave’ of providers – and by presenting and discussing some possible scenarios for the future of ssc within the international aid system.  相似文献   
924.
925.
School districts are faced with the challenge of how best to serve the needs of a growing homeless student population. As the numbers of homeless children and youth continue to rise, it is imperative for educators and others to understand the experiences of unaccompanied homeless youth. A qualitative research project was undertaken to obtain the perspectives of six high school students experiencing homelessness. These perspectives illuminate the various and multiple factors intersecting with student's educational lives. Their narratives uncovered the following themes: (a) Homelessness as a misnomer, (b) Homelessness is not a choice, (c) Caring adults, and (d) Student agency. Their counternarratives challenge adults working with unaccompanied homeless youth to rethink and reimagine the manner in which homelessness is understood and framed; this is especially critical in educational spaces. Schools often are the primary contexts in which youth spend their time and can be instrumental to providing youth experiencing homelessness with the support and resources they identify as being critical to their educational engagement and success.  相似文献   
926.
Previous correlational research indicates that adolescent girls who use social network sites more frequently are more dissatisfied with their bodies. However, we know little about the causal direction of this relationship, the mechanisms underlying this relationship, and whether this relationship also occurs among boys to the same extent. The present two-wave panel study (18 month time lag) among 604 Dutch adolescents (aged 11–18; 50.7 % female; 97.7 % native Dutch) aimed to fill these gaps in knowledge. Structural equation modeling showed that social network site use predicted increased body dissatisfaction and increased peer influence on body image in the form of receiving peer appearance-related feedback. Peer appearance-related feedback did not predict body dissatisfaction and thus did not mediate the effect of social network site use on body dissatisfaction. Gender did not moderate the findings. Hence, social network sites can play an adverse role in the body image of both adolescent boys and girls.  相似文献   
927.
928.
929.
930.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号