全文获取类型
收费全文 | 2718篇 |
免费 | 152篇 |
专业分类
各国政治 | 244篇 |
工人农民 | 129篇 |
世界政治 | 271篇 |
外交国际关系 | 218篇 |
法律 | 1156篇 |
中国共产党 | 2篇 |
中国政治 | 33篇 |
政治理论 | 789篇 |
综合类 | 28篇 |
出版年
2023年 | 24篇 |
2022年 | 17篇 |
2021年 | 26篇 |
2020年 | 63篇 |
2019年 | 97篇 |
2018年 | 112篇 |
2017年 | 123篇 |
2016年 | 145篇 |
2015年 | 88篇 |
2014年 | 99篇 |
2013年 | 465篇 |
2012年 | 100篇 |
2011年 | 89篇 |
2010年 | 95篇 |
2009年 | 99篇 |
2008年 | 89篇 |
2007年 | 109篇 |
2006年 | 111篇 |
2005年 | 107篇 |
2004年 | 72篇 |
2003年 | 96篇 |
2002年 | 87篇 |
2001年 | 48篇 |
2000年 | 57篇 |
1999年 | 36篇 |
1998年 | 52篇 |
1997年 | 30篇 |
1996年 | 35篇 |
1995年 | 35篇 |
1994年 | 28篇 |
1993年 | 23篇 |
1992年 | 25篇 |
1991年 | 9篇 |
1990年 | 28篇 |
1989年 | 8篇 |
1988年 | 24篇 |
1987年 | 20篇 |
1986年 | 5篇 |
1985年 | 5篇 |
1984年 | 12篇 |
1983年 | 12篇 |
1982年 | 9篇 |
1981年 | 8篇 |
1980年 | 6篇 |
1979年 | 11篇 |
1978年 | 4篇 |
1977年 | 8篇 |
1975年 | 3篇 |
1970年 | 3篇 |
1964年 | 2篇 |
排序方式: 共有2870条查询结果,搜索用时 46 毫秒
141.
ABSTRACTAlthough India’s cotton sector has been penetrated by various input- and capital-intensive methods, penetration by herbicide has been largely stymied. In Telangana State, the main obstacle has been the practice of ‘double-lining’, in which cotton plants are spaced widely to allow weeding by ox-plow. Path dependency theory primarily explains the persistence of sub-optimal practices, but double-lining is an example of an advantageous path for cash-poor farmers. However, it is being actively undermined by parties intent on expanding herbicide markets and opening a niche for next-generation genetically modified cotton. We use the case to explicate the role of treadmills in technology ‘lock-in’. We also examine how an adaptive locked-in path may be broken by external interests, drawing on recent analyses of ‘didactic’ learning by farmers. 相似文献
142.
143.
Andrew L. Dabalen 《发展研究杂志》2014,50(12):1631-1646
AbstractThis article evaluates the effect of armed conflict on years of schooling in Côte d’Ivoire. We combine differences in conflict intensity across departments and differences across age cohorts to identify an individual’s indirect exposure to conflict. The difference-in-difference outcomes indicate that the average years of education for a school-going-age cohort is 0.94 years fewer compared to an older cohort in conflict-affected regions. We further use a set of victimisation indicators to identify the direct effect of conflict. Overall, the findings across different models suggest a drop in average years of education by a range of 0.2 to 0.9 fewer years. The estimated effect is larger for males and individuals between 19 and 22 years of age. 相似文献
144.
Ridwan Maulana Marie-Christine Opdenakker Kim Stroet Roel Bosker 《Journal of youth and adolescence》2013,42(9):1348-1371
Research consistently shows that the learning environment plays an important role for early adolescents’ learning and outcomes and suggests that good teacher–student relationships can serve as a protective factor for maintaining young adolescents’ interest and active engagement in learning. However, less is known about the dynamic nature of teacher–student relationships and how they link with academic motivation development. Furthermore, little is known about the nature and the effects of teacher–student relationships in a cross-national context. The present study investigated changes in two components of teacher–student relationships (teachers’ involvement vs. rejection) and examined links with students’ academic motivation during the first grade of secondary school. Ten Dutch and ten Indonesian teachers (65 % female) from 24 classes were videoed 12 times across the school year, and four videos for each class were selected randomly and coded on teachers’ involvement versus rejection. A total of 713 students (52 % girls) completed four-wave measures of their academic motivation after each video observation. Multilevel growth curve modeling revealed that the teacher’s involvement changed in a curvilinear way and decreased across the first year of secondary education, while changes in the teacher’s rejection did not follow a linear time function. Academic motivation changed in an undesirable way: controlled motivation increased, while autonomous motivation decreased over time. Teachers’ involvement had a unique contribution in preventing high levels of controlled motivation in both countries. Findings suggest that teacher–student relationships (teachers’ involvement) play an essential role in early adolescents’ motivation regardless of the nations and should be a priority for schools. 相似文献
145.
Kim F. Hall 《Women & Performance》2013,23(2):169-180
This essay examines the competing readings of food refusal that emerged from a student hunger strike held at Columbia University in fall 2007. The invisibility of the act of food refusal forces hunger strikers to adopt performance strategies that make their (non)action visible as protest. To make the politics of their food refusal legible, advocates for the hunger strike promoted their actions as part of a 40 year tradition of student protest. However, that same invisibility allowed the protest's detractors to deride the hunger strikers as anorexic. At the center of the protest and the commentary about it was a wasting female body that confused for spectators the line between the political and the pathological. Attention to this body raises questions of how community is created and disciplined through performative acts, how easily female protest is evacuated of political meaning and the uneasy role of whiteness in popular attention to anorexia. 相似文献
146.
147.
148.
149.
150.