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   2578篇
  免费   93篇
各国政治   157篇
工人农民   89篇
世界政治   228篇
外交国际关系   182篇
法律   1082篇
中国政治   21篇
政治理论   890篇
综合类   22篇
  2023年   14篇
  2020年   34篇
  2019年   38篇
  2018年   64篇
  2017年   72篇
  2016年   77篇
  2015年   55篇
  2014年   53篇
  2013年   424篇
  2012年   41篇
  2011年   58篇
  2010年   58篇
  2009年   61篇
  2008年   69篇
  2007年   66篇
  2006年   73篇
  2005年   70篇
  2004年   84篇
  2003年   75篇
  2002年   69篇
  2001年   51篇
  2000年   40篇
  1999年   38篇
  1998年   55篇
  1997年   41篇
  1996年   34篇
  1995年   54篇
  1994年   47篇
  1993年   46篇
  1992年   33篇
  1991年   37篇
  1990年   41篇
  1989年   45篇
  1988年   42篇
  1987年   41篇
  1986年   40篇
  1985年   36篇
  1984年   41篇
  1983年   35篇
  1982年   37篇
  1981年   25篇
  1980年   23篇
  1978年   28篇
  1977年   25篇
  1976年   21篇
  1975年   15篇
  1974年   27篇
  1973年   18篇
  1969年   16篇
  1968年   11篇
排序方式: 共有2671条查询结果,搜索用时 15 毫秒
101.
102.
This article investigates the mechanisms that voluntary environmental program (VEP) participants adopt to reduce pollution. The focus of this article is the 33/50 program, a VEP introduced by the U.S. Environmental Protection Agency in 1991 and discontinued in 1995. The program called for emissions reductions for 17 chemicals reported to the Toxics Release Inventory. Using a sample of approximately 12,000 plants, the relationship between 33/50 program participation and adoption of pollution reduction practices is studied for three time periods, 1991–1995 (program life), 1996–2004, and 2005–2013. These practices include source reduction activities (SRAs) and recycling, recovery, and treatment (RRTs). The major findings are that during the program's life, 33/50 participants showed increased adoption of SRAs and RRTs for both targeted and nontargeted chemicals. However, once the program ended, higher adoption rates persisted for RRTs only, with a shift in emphasis toward treatment over recycling and recovery.  相似文献   
103.
104.
Adolescence is a challenging developmental period marked with declines in emotional well-being; however, self-compassion has been suggested as a protective factor. This cross-sectional survey study (N?=?765, grades 7th to 12th; 53?% female; 4?% Hispanic ethnicity; 64?% White and 21?% Black) examined whether adolescents’ self-compassion differed by age and gender, and secondly, whether its associations with emotional well-being (perceived stress, life satisfaction, distress intolerance, depressive symptoms, and anxiety) also differed by age and gender. The findings indicated that older females had the lowest self-compassion levels compared to younger females or all-age males. Self-compassion was associated with all emotional well-being measures, and gender and/or age moderated the associations with anxiety and depressive symptoms. Among older adolescents, self-compassion had a greater protective effect on anxiety for boys than for girls. Additionally, older adolescents with low and average self-compassion had greater levels of depressive symptoms than those with high self-compassion. These results may inform for whom and at what age self-compassion interventions may be implemented to protect adolescents from further declines in emotional well-being.  相似文献   
105.
106.
A comparative analysis of Islamic extremism post-9/11 to 2015 and the effectiveness of the counterterrorism (CT) authorities to counter it in both Western Europe and the United States was conducted. Four measures of effectiveness revealed that 2010–2015 saw a gradual increase in jihadi attacks and in casualties emanating from these attacks, and more jihadists, foreign fighters, and material supporters. Additionally, 2013–2015 saw a 22 percent reduction both in Western Europe and the U.S. CT agencies' ability to counter Islamic extremism. We are losing the War on Terror and our citizens are less safe than they were six years ago. Further analysis revealed that singleton jihadists: (1) were much harder than group-based jihadists to uncover, (2) have been increasing since 2009, and (3) have generated over 70 percent of all jihadi violence. Finally, numerous similarities exist between Western Europe and the United States with respect to jihadism in their homelands and their respective CT effectiveness, indicating close cross-Atlantic CT collaboration since 9/11. This in-depth analysis provides essential threat/hazard information to security, law enforcement, intelligence, and policymaking personnel and the greater homeland security communities.  相似文献   
107.
108.
Throughout his career as a literary critic, Alfred Kazin wrote often and with sympathy and insight about Theodore Dreiser, one of the most powerful, panoramic, and compassionate novelists in American literary history. Kazin was an intense reader and writer, committed in his books, essays, and reviews to connecting with and describing the personality of each author he examined. His interpretive work on Dreiser illuminates what it means to be a literary critic and teacher. When we read Kazin in the midst of twenty-first century theory, ideology, and professionalism, we realize all the more clearly the goal in his literary criticism that he aimed for, achieved, and represented—and that now is missing from literary education and experience.  相似文献   
109.
Scholarship on collaborative governance identifies several structural and procedural factors that consistently influence governance outcomes. A promising next step for collaborative governance research is to explore how these factors interact. Focusing on two dimensions of social learning—relational and cognitive—as outcomes of collaboration, this article examines potential interacting effects of participant diversity and trust. The empirical setting entails 10 collaborative partnerships in the United States that provide advice on marine aquaculture policy. The findings indicate that diversity in beliefs among participants is positively related to relational learning, whereas diversity in participants' affiliations is negatively related to relational learning, and high trust bolsters the positive effects of belief diversity on both relational and cognitive learning. In addition, high trust dampens the negative effects of affiliation diversity on relational learning. A more nuanced understanding of diversity in collaborative governance has practical implications for the design and facilitation of diverse stakeholder groups.  相似文献   
110.
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