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   20187篇
  免费   224篇
各国政治   749篇
工人农民   862篇
世界政治   1187篇
外交国际关系   684篇
法律   13394篇
中国共产党   2篇
中国政治   325篇
政治理论   3117篇
综合类   91篇
  2023年   103篇
  2021年   110篇
  2020年   481篇
  2019年   504篇
  2018年   601篇
  2017年   630篇
  2016年   714篇
  2015年   593篇
  2014年   604篇
  2013年   1938篇
  2012年   564篇
  2011年   681篇
  2010年   724篇
  2009年   713篇
  2008年   588篇
  2007年   522篇
  2006年   587篇
  2005年   455篇
  2004年   441篇
  2003年   364篇
  2002年   416篇
  2001年   685篇
  2000年   622篇
  1999年   496篇
  1998年   258篇
  1997年   185篇
  1996年   207篇
  1995年   215篇
  1994年   185篇
  1993年   196篇
  1992年   313篇
  1991年   327篇
  1990年   321篇
  1989年   288篇
  1988年   324篇
  1987年   272篇
  1986年   332篇
  1985年   330篇
  1984年   251篇
  1983年   236篇
  1982年   184篇
  1981年   162篇
  1980年   149篇
  1979年   225篇
  1978年   119篇
  1977年   96篇
  1975年   101篇
  1974年   129篇
  1973年   85篇
  1972年   80篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Preliminary research suggests that partner violence is a problem among lesbian, gay, bisexual, transgender, queer, and questioning (LGBTQ) college youth. However, there is no study to date with college youth on the factors associated with perpetration of same-sex partner violence, which is needed to inform prevention efforts specific to this population. Thus, the purpose of the current study was to assess how facets of minority stress (i.e., sexual-orientation-related victimization, sexual minority stigma, internalized homonegativity, sexual identity concealment) relate to physical, sexual, and psychological partner violence perpetration among LGBTQ college youth (N = 391; 49 % identified as men; 72 % Caucasian; M age: 20.77 years). At the bivariate level, physical perpetration was related to identity concealment and internalized homonegativity; sexual perpetration was related to internalized homonegativity; and psychological perpetration was related to sexual-orientation-related victimization. However, at the multivariate level (after controlling for concurrent victimization), psychological perpetration was unrelated to minority stress variables, whereas physical and sexual perpetration were both related to internalized homonegativity; physical perpetration was also related to identity concealment. These results underscore the utility of understanding partner violence among LGBTQ youth through a minority stress framework. Moreover, the current study highlights the need for a better understanding of factors that mediate and moderate the relationship between minority stress and partner violence perpetration among LGBTQ youth in order to inform prevention and intervention efforts.  相似文献   
992.
993.
994.
995.
996.
997.
998.
999.
Dual-credit courses expose high school students to college-level content and provide the opportunity to earn college credits, in part to smooth the transition to college. With the Tennessee Department of Education, we conduct the first randomized controlled trial of the effects of dual-credit math coursework on a range of high school and college outcomes. We find that the dual-credit advanced algebra course alters students’ subsequent high school math course-taking, reducing enrollment in remedial math and boosting enrollment in precalculus and Advanced Placement math courses. We fail to detect an effect of the dual-credit math course on overall rates of college enrollment. However, the course induces some students to choose four-year universities instead of two-year colleges, particularly for those in the middle of the math achievement distribution and those first exposed to the opportunity to take the course in eleventh rather than twelfth grade. We see limited evidence of improvements in early math performance during college.  相似文献   
1000.
We conduct the first long-term experimental evaluation of a need-based financial aid program, the privately funded Wisconsin Scholars Grant. Over multiple cohorts, the program failed to increase degree completion and graduate school enrollment up to 10 years after matriculation. The program did reduce time-to-degree for some students and modestly increased the number of STEM degrees earned. The lack of robust effects raises important questions about the conditions necessary for financial aid to benefit students.  相似文献   
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