全文获取类型
收费全文 | 2493篇 |
免费 | 79篇 |
专业分类
各国政治 | 157篇 |
工人农民 | 69篇 |
世界政治 | 227篇 |
外交国际关系 | 162篇 |
法律 | 1047篇 |
中国政治 | 18篇 |
政治理论 | 870篇 |
综合类 | 22篇 |
出版年
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 | 394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 | 69篇 |
2001年 | 51篇 |
2000年 | 40篇 |
1999年 | 39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 | 32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2572条查询结果,搜索用时 15 毫秒
201.
202.
203.
204.
205.
William M. Rivera 《The Journal of Technology Transfer》1991,16(3):29-37
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
206.
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
207.
208.
William E. Forbath 《Law & social inquiry》1991,16(1):1-34
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
209.
Longmore Monica A. Sevareid Eric E. Manning Wendy D. Giordano Peggy C. Clemens William Taylor Heather 《Journal of youth and adolescence》2022,51(2):320-334
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
210.
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