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   3912篇
  免费   96篇
各国政治   257篇
工人农民   145篇
世界政治   324篇
外交国际关系   378篇
法律   1634篇
中国共产党   1篇
中国政治   27篇
政治理论   1189篇
综合类   53篇
  2020年   49篇
  2019年   51篇
  2018年   80篇
  2017年   78篇
  2016年   103篇
  2015年   59篇
  2014年   81篇
  2013年   780篇
  2012年   79篇
  2011年   102篇
  2010年   105篇
  2009年   131篇
  2008年   114篇
  2007年   118篇
  2006年   102篇
  2005年   119篇
  2004年   121篇
  2003年   112篇
  2002年   160篇
  2001年   91篇
  2000年   93篇
  1999年   91篇
  1998年   66篇
  1997年   79篇
  1996年   58篇
  1995年   47篇
  1994年   39篇
  1993年   51篇
  1992年   55篇
  1991年   60篇
  1990年   42篇
  1989年   54篇
  1988年   45篇
  1987年   43篇
  1986年   55篇
  1985年   48篇
  1984年   31篇
  1983年   56篇
  1982年   44篇
  1981年   32篇
  1980年   28篇
  1979年   25篇
  1978年   25篇
  1977年   22篇
  1976年   26篇
  1975年   19篇
  1974年   28篇
  1973年   13篇
  1972年   13篇
  1971年   14篇
排序方式: 共有4008条查询结果,搜索用时 15 毫秒
91.
92.
93.
94.
95.
This study examined the mediated and moderated effects of a universal family-focused preventive intervention, delivered during young adolescence, on internalizing symptoms assessed in young adulthood. Sixth grade students (N=446; 52% female; 98% White) and their families from 22 rural Midwestern school districts were randomly assigned to the experimental conditions in 1993. Self-report questionnaires were administered at seven time points (pre-test to young adulthood-age 21) to those receiving the Iowa Strengthening Families Program (ISFP) and to the control group. Results showed that growth factors of adolescent internalizing symptoms (grades 6-12) were predicted by ISFP condition and risk status (defined as early substance initiation). Moderation of the condition effect by risk status was found, with higher-risk adolescents benefitting more from the ISFP. Results also supported the hypothesis that the ISFP's effect on internalizing symptoms in young adulthood was mediated through growth factors of adolescents' internalizing symptoms; risk moderation, however, was only marginally significant in young adulthood. The relative reduction rate on clinical or subclinical levels of young adult internalizing symptoms was 28%, indicating that for every 100 young adults displaying clinical or subclinical levels of internalizing symptoms from school districts not offering an intervention, there could be as few as 72 displaying those levels of symptoms in school districts that offered middle school prevention programming. These findings highlight how the positive effects of family-focused universal interventions can extend to non-targeted outcomes and the related potential public-health impact of scaling up these interventions.  相似文献   
96.
97.
图片新闻     
郭小华 《中国民族:英文版》2012,(1):F0002-F0002,1
  相似文献   
98.
99.
This paper models the effect of firm-level profitability (earnings before interest and taxes and return on sales) against certification by former members of the U.S. Congress. Although some scholars have studied certification, none have studied certification in the public policy market as is done in the current work. Likewise, although scholars have studied the effects of lobbying and political connections on firms' outcomes, none have studied lobbying through former Congress members specifically. The findings confirm that, after controlling for numerous factors, firms can use former Congress members to effectively lobby and certify their intentions. Both firm-level earnings before interest and taxes and return on sales were significantly associated with prior lobbying efforts by these former elected federal officials in several different estimation techniques employed in the study.  相似文献   
100.
Two separate frameworks have existed for the analysis of social predicaments in which businesses play a role: issues management and stakeholder management. In this paper, we argue that the chasm dividing these two literatures is artificial, and potentially obstructive to the advancement of our knowledge of the position of business in contemporary societies. The position we take in the present paper is that all social predicaments have an issues side as well as a stakeholder side and that a dual focus on both issues and stakeholders is therefore essential to understanding the evolution of these predicaments and crucial to managerial dealings with these issues. We present an integrative co-evolutionary framework, explaining the dynamics between issues and stakeholders in all consecutive stages of a predicament's evolution. The framework proposes a new way of thinking about issues and stakeholders, as such facilitates a deeper understanding of how the social environment of business is constituted, and offers new insights for the practical management of issues and stakeholders.  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