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   2480篇
  免费   91篇
各国政治   157篇
工人农民   70篇
世界政治   227篇
外交国际关系   162篇
法律   1045篇
中国政治   18篇
政治理论   870篇
综合类   22篇
  2023年   14篇
  2020年   34篇
  2019年   37篇
  2018年   57篇
  2017年   67篇
  2016年   73篇
  2015年   51篇
  2014年   50篇
  2013年   395篇
  2012年   39篇
  2011年   57篇
  2010年   56篇
  2009年   60篇
  2008年   68篇
  2007年   60篇
  2006年   73篇
  2005年   67篇
  2004年   82篇
  2003年   72篇
  2002年   68篇
  2001年   50篇
  2000年   40篇
  1999年   38篇
  1998年   54篇
  1997年   39篇
  1996年   33篇
  1995年   54篇
  1994年   43篇
  1993年   45篇
  1992年   33篇
  1991年   35篇
  1990年   40篇
  1989年   44篇
  1988年   40篇
  1987年   41篇
  1986年   39篇
  1985年   35篇
  1984年   41篇
  1983年   33篇
  1982年   36篇
  1981年   23篇
  1980年   22篇
  1978年   28篇
  1977年   24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2571条查询结果,搜索用时 15 毫秒
231.
232.
233.
234.
This second of a two-part article on global policy trends in agricultural extension deals with complexity. Policy differs enormously from country to country. The author believes that, rather than producing confusion and frustration in the field, the great variety of methodologies, institutional frameworks, and program priorities provides a rich field of ideas for study and practice. The major position in the article is that extension must be dealt with as part of a total agricultural-development process rather than an isolated subsystem for transferring technology to farmers.  相似文献   
235.
236.
Despite the burdens that students and institutions assume when underwriting educational careers, very little is known about completion rates, risk factors, and successful strategies of criminology/criminal justice (CCJ) graduate programs. Consequently, the present study tracks 287 master’s and 70 doctoral students who entered the Florida State University CCJ program during the 1991–2000 academic years. Almost two-thirds of this cohort earned an advanced degree. Younger students with higher GRE scores were more likely to complete the master’s program. Successful doctoral degree recipients tended to have lower GRE scores, be non-White, and earn their master’s degrees in-house. In terms of time-to-degree, it took over two years to earn an M.A. and slightly more than six years to negotiate the Ph.D. Implications are explored for the program, the university, and the discipline.  相似文献   
237.
238.
For most of the 19th century, the labor movements of England and America seemed to be developing along similar lines. Then, in the decades around the turn of the century, both movements were embroiled in a common battle over the political soul of trade unionism. In England, the champions of broad, class-based social and industrial reforms prevailed. In the United States, they lost, and the winners were the voluntarists, who held that labor should steer clear of politics as much as possible. This article suggests that the key reasons for the divergence lie not in the sociology of the working class or labor movement, so much as in the character of the state and polity and the lessons trade unionists drew from experiences in those arenas. The difference between judicial supremacy in the United States and parliamentary supremacy in England combined with other differences in the two nations'forms of government to produce sharply contrasting lessons about the value of state-based reforms.  相似文献   
239.
Journal of Youth and Adolescence - Despite the centrality of dating relationships for teens, it is unclear whether the influence of romantic partners’ alcohol use on adolescents’...  相似文献   
240.
Journal of Quantitative Criminology - Identify the effect of differences in criminal activity among birth cohorts on crime rates over time. Determine the extent to which cohort effects are...  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