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   813篇
  免费   41篇
各国政治   100篇
工人农民   25篇
世界政治   69篇
外交国际关系   48篇
法律   379篇
中国共产党   1篇
中国政治   7篇
政治理论   220篇
综合类   5篇
  2023年   4篇
  2022年   4篇
  2021年   5篇
  2020年   17篇
  2019年   21篇
  2018年   22篇
  2017年   28篇
  2016年   31篇
  2015年   27篇
  2014年   29篇
  2013年   141篇
  2012年   22篇
  2011年   20篇
  2010年   25篇
  2009年   16篇
  2008年   24篇
  2007年   20篇
  2006年   31篇
  2005年   31篇
  2004年   26篇
  2003年   34篇
  2002年   38篇
  2001年   10篇
  2000年   12篇
  1999年   13篇
  1998年   22篇
  1997年   18篇
  1996年   10篇
  1995年   6篇
  1994年   12篇
  1993年   16篇
  1992年   9篇
  1991年   8篇
  1990年   7篇
  1989年   11篇
  1988年   17篇
  1987年   4篇
  1986年   4篇
  1985年   3篇
  1984年   6篇
  1983年   3篇
  1982年   5篇
  1981年   5篇
  1979年   7篇
  1978年   5篇
  1975年   3篇
  1973年   3篇
  1972年   3篇
  1970年   2篇
  1968年   2篇
排序方式: 共有854条查询结果,搜索用时 15 毫秒
831.
Discretion and rights  相似文献   
832.
833.
A two wave survey carried out on a large community sample of adolescents with increased risk for problems with social functioning is described. In this paper we report the prevalence of depression in this population and social factors that contribute to it. The prevalence of depression is twice that in other studies. Stress is both a risk and causal factor in depression while relatively low social self-efficacy moderately increases risk. Being female is a risk factor for depression. The perception of parents and siblings as a source of support appears to be a key factor in protection from the onset of depression.Received M.D. from Queen's University. Research interests include developmental experiences that influence adolescent and adult social functioning, and mechanisms of mortality rates in post coronary depressed subjects.Received Ph.D. from University of Waterloo. Research interests are risk factors affecting depression in adolescents and young adults and social factors associated with chronic pain.Received Ph.D. from McMaster University. Research interests are psycho-social factors that influence adolescent well being, measurement of clinical competence, and research design.Received M.A. from McMaster University.  相似文献   
834.
835.
836.
837.
838.
This study investigated the relation of adolescent same-sex attraction to “successful development” (Baltes, P. B., Am. Psychol. 32:366–380, 1997). Based on a survey of high-school adolescents, four groups were defined according to the nature of self-reported sexual attraction: exclusively heterosexual (EHA; n=3594); mostly heterosexual (MHA; n=124); bisexual (BSA; n=122); and same-sex attraction (SSA, n=36). Groups were compared across multiple intrapersonal, interpersonal, and environmental domains based on mean group differences and prevalence of developmental assets. Although the EHA group reported the most positive status across domains, several similarities among the groups were noted. Groups did not differ significantly in friendship quality and perceptions of school climate in the mean group comparisons, as well as academic orientation and (low) peer victimization in the assets-based analyses. Implications for successful development among adolescents reporting same-sex attraction are discussed along with the integration of the study of non-heterosexual youth into mainstream adolescent research.
Michael A. BusseriEmail:
  相似文献   
839.
Violence-related behavior in schools has declined in recent years, but the perception of risk remains high. Disturbingly high percentages of students and teachers report staying home out of fear, and many students bring weapons to school for protection. Current proposals for preventing school violence include punishing the violence-prone, expulsion for weapon carriers, and creating a culture of nonviolence through various behavioral methods like conflict resolution. None of these proposals address the issue of lethal violence and hence personal safety. The risk of lethal violence in schools (related mainly to firearms) could be substantially reduced by creating an effective barrier between firearms and people. This could be achieved by using entry-based weapons detection systems similar to those now used in airports and courts. Decreasing the risk and fear of violence by converting schools into weapons-free zones would also be expected to increase attendance and improve scholastic performance. Randomized, controlled studies should be undertaken to evaluate the efficacy and cost-effectiveness of entry-based weapons detection systems for achieving these outcomes.  相似文献   
840.
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