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   4105篇
  免费   137篇
各国政治   166篇
工人农民   123篇
世界政治   282篇
外交国际关系   124篇
法律   2814篇
中国政治   39篇
政治理论   680篇
综合类   14篇
  2021年   28篇
  2020年   49篇
  2019年   54篇
  2018年   78篇
  2017年   91篇
  2016年   82篇
  2015年   72篇
  2014年   81篇
  2013年   304篇
  2012年   96篇
  2011年   127篇
  2010年   95篇
  2009年   103篇
  2008年   126篇
  2007年   94篇
  2006年   118篇
  2005年   105篇
  2004年   108篇
  2003年   103篇
  2002年   96篇
  2001年   188篇
  2000年   136篇
  1999年   110篇
  1998年   40篇
  1997年   51篇
  1996年   41篇
  1995年   52篇
  1994年   48篇
  1993年   62篇
  1992年   83篇
  1991年   92篇
  1990年   85篇
  1989年   71篇
  1988年   86篇
  1987年   85篇
  1986年   104篇
  1985年   116篇
  1984年   90篇
  1983年   85篇
  1982年   43篇
  1981年   47篇
  1979年   39篇
  1978年   37篇
  1975年   33篇
  1974年   48篇
  1973年   25篇
  1972年   29篇
  1971年   31篇
  1970年   31篇
  1968年   35篇
排序方式: 共有4242条查询结果,搜索用时 15 毫秒
141.
Despite evidence that neighborhoods confer both risk and resilience for youth development, the existing neighborhood research has a number of methodological limitations including lack of diversity in neighborhoods sampled and neighborhood characteristics assessed. The purpose of this study was to address these methodological limitations of existing research and to examine the relationship of neighborhood structural and social characteristics to family-level social processes and teacher-reported social competence during early adolescence. The study sample of 3,624 fifth graders (51?% girls) was ethnically diverse, including roughly even proportions of non-Hispanic White, non-Hispanic Black, and Hispanic youth. Neighborhood measures included economic disadvantage derived from the U.S. Census, physical and social disorder obtained by direct observation, and social capital from parental reports. Family-level social processes included parent reported family cohesion and youth reported maternal and paternal nurturance. We found that neighborhood factors significantly associated with youth social aggression and social competence but not social withdrawal, after controlling for individual demographic characteristics and parenting factors. There was limited evidence of moderation of family influences by neighborhood characteristics as well as the moderation of neighborhood effects by children’s gender. Neighborhood physical disorder was associated with increased social aggression among boys but with increased social withdrawal among girls. Implications of the study’s findings for research on neighborhoods and adolescent development and the development of preventive interventions are discussed.  相似文献   
142.
143.
According to their governments, economic relations between Kazakhstan and Russia—the two largest post-Soviet countries—have been exceptionally solid and robust. However, statistical data demonstrate that Russian investments in Kazakhstan's economy have been weak, and that Kazakhstan has only recently increased investment in the Russian economy. This raises the question of whether relations between the two countries have been more uneven than has been claimed officially. The article also explores the influence of off-shore investments via third countries and other aspects of the bilateral relationship between Kazakhstan and Russia and the involvement of each country in the other's economy.  相似文献   
144.
145.
Jessica N. Pabón interviews graffiti artist Abby Andrews, a.k.a. AbbyTC5, about her canvas painting Queens, the image on the front cover of the special issue.  相似文献   
146.
The pandemic of Covid-19 has exposed the veins of inequality in Latin America. With a socioeconomic disaster looming, social emergency policies seemed inevitable. Yet while governments argue over the continuity of such policies and whether the fiscal rules in place should be respected, no sustainable response has come out. This essay problematises whether the pandemic could represent a critical juncture to forge ahead with political narratives that highlight tax exemptions and privileges enjoyed by the rich. We analyse the mitigation measures adopted by Argentina, Brazil, Chile and Uruguay and their repercussions on the debate surrounding progressive tax reforms to fund social schemes.  相似文献   
147.
An important component of crime scene reconstruction is bloodstain pattern analysis (BPA). Where BPA concerns impact patterns, estimating the area of origin is critical information for scene reconstruction. Traditionally, this is achieved by measuring individual bloodstains and performing trigonometric calculations; however, 3D scanning has been proposed as a viable alternative for overcoming logistical and practical concerns with the manual method. Therefore, this project aimed to establish whether the FARO Focus 3D scanner and FARO Zone 3D software can improve the accuracy of area of origin estimates relative to the manual method. We created a series of eight bloodstain impact patterns and performed paired analysis using the two methods to estimate areas of origin for each pattern. Our data suggested that FARO-derived estimates were generally more accurate than using the manual method. FARO-estimated heights of origin areas were generally closer to the true distance. Both methods underestimated the distance from the wall for most patterns originating 150mm or greater from the wall, but overestimated distances for patterns originating closer to the wall. The degree to which distances were underestimated increased significantly the further the blood source was from the wall and was greater for FARO-derived estimates. The results of this research contribute to the validation of these instruments for operational implementation for BPA and should be considered alongside the practical benefits of 3D scanning relative to manual methods. Further, 3D scanning can provide reliable BPA reconstruction documentation for technical review and court presentation.  相似文献   
148.
Political Behavior - Americans are increasingly turning to social media for political information. However, given that the average social media user only clicks through on a small fraction of the...  相似文献   
149.
JAMES TRILLING 《耶鲁评论》2019,107(3):136-145
  相似文献   
150.
The National Oceanic and Atmospheric Administration instituted a Planning, Programming, Budgeting, and Execution System (PPBES) in 2002. As supplemented by matrix management, PPBES was appealing as an effort to rationalize the performance of an agency with an especially high degree of functional overlap among its component parts. Although PPBES has had some salutary effects, the agency's experience to date consistent with accounts of the difficulties that led to the abandonment of program budgeting by the civilian bureaucracy almost 40 years ago. As such, it speaks to the limits of performance assessment as a means of reallocating resources and responsibilities across organizational boundaries.  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