全文获取类型
收费全文 | 7137篇 |
免费 | 215篇 |
专业分类
各国政治 | 235篇 |
工人农民 | 244篇 |
世界政治 | 480篇 |
外交国际关系 | 214篇 |
法律 | 4881篇 |
中国政治 | 47篇 |
政治理论 | 1214篇 |
综合类 | 37篇 |
出版年
2020年 | 92篇 |
2019年 | 112篇 |
2018年 | 130篇 |
2017年 | 159篇 |
2016年 | 162篇 |
2015年 | 109篇 |
2014年 | 157篇 |
2013年 | 641篇 |
2012年 | 169篇 |
2011年 | 186篇 |
2010年 | 159篇 |
2009年 | 156篇 |
2008年 | 187篇 |
2007年 | 214篇 |
2006年 | 222篇 |
2005年 | 179篇 |
2004年 | 185篇 |
2003年 | 201篇 |
2002年 | 164篇 |
2001年 | 314篇 |
2000年 | 291篇 |
1999年 | 220篇 |
1998年 | 85篇 |
1997年 | 69篇 |
1996年 | 75篇 |
1995年 | 68篇 |
1994年 | 76篇 |
1993年 | 61篇 |
1992年 | 141篇 |
1991年 | 153篇 |
1990年 | 136篇 |
1989年 | 155篇 |
1988年 | 134篇 |
1987年 | 149篇 |
1986年 | 134篇 |
1985年 | 152篇 |
1984年 | 118篇 |
1983年 | 139篇 |
1982年 | 93篇 |
1981年 | 93篇 |
1980年 | 69篇 |
1979年 | 99篇 |
1978年 | 74篇 |
1977年 | 66篇 |
1976年 | 57篇 |
1975年 | 46篇 |
1974年 | 57篇 |
1973年 | 59篇 |
1971年 | 50篇 |
1970年 | 46篇 |
排序方式: 共有7352条查询结果,搜索用时 15 毫秒
301.
Lawrence P. Markowitz 《Terrorism and Political Violence》2017,29(2):342-358
It is often noted in resource curse literature that agricultural economies are less conflict-prone than countries managing mobile, high-value resources. In the vast literature linking resource endowment and conflict, cash crop economies are often considered immune to civil violence, believed to stand apart from the many horrific episodes of violence and civil war centered on “lootable” wealth (such as alluvial diamonds, tin, tungsten, or other conflict minerals). But many incidents of violence—especially local violence—are in fact occurring in cash crop economies. Drawing on newspaper accounts, policy analyses, ethnographic interviews, and in-depth reports by international organizations, I examine an episode of local violence in 2010 in Kyrgyzstan. Through this case study, the article provides a better understanding of local violence in cash crop economies that can apply to other weak states. 相似文献
302.
Yann P. Kerevel 《拉美政治与社会》2014,56(3):93-117
Why do politicians in Mexico switch parties? The party‐switching literature suggests that politicians generally switch parties for office‐seeking or policy‐seeking motives, whereas literature on the Mexican party system suggests that switching may be related to party system realignment during the democratic transition. Using data on party switching across the political careers of politicians who served as federal deputies between 1997 and 2009, this study argues that party switching in Mexico can primarily be explained by the office‐seeking behavior of ambitious politicians. Only in rare instances do politicians switch parties because of policy disagreements, and party system realignment fails to explain a large number of party switches. This article also suggests that the ban on consecutive re‐election encourages party switching; after every term in office, Mexican politicians have the opportunity to re‐evaluate their party affiliation to continue their careers. 相似文献
303.
304.
Caroline W. Kabiru Donatien Beguy Robert P. Ndugwa Eliya M. Zulu Richard Jessor 《Child & Youth Services》2013,34(1):12-32
Many adolescents living in contexts characterized by adversity achieve positive outcomes. We adopt a protection–risk conceptual framework to examine resilience (academic achievement, civic participation, and avoidance of risk behaviors) among 1,722 never-married 12–19 year olds living in two Kenyan urban slums. We find stronger associations between explanatory factors and resilience among older (15–19 years) than younger (12–14 years) adolescents. Models for prosocial behavior and models for antisocial behavior emerge as key predictors of resilience. Further accumulation of evidence on risk and protective factors is needed to inform interventions to promote positive outcomes among youth situated in an ecology of adversity. 相似文献
305.
AbstractThis article explores the heterogeneous effects of the migration–remittance process on the educational attainment of Nepalese children. The results suggest that when controlling for remittances, the children of more educated or informed parents suffer from parental absence, while the children of less informed parents gain from migration, implying that the migration experience helps less educated parents estimate the value of and returns to education more precisely. The results also suggest that remittances help severely credit-constrained households enrol their children in school and prevent dropouts. These remittances help households that face less severe liquidity constraints increase their investment in quality education. 相似文献
306.
307.
308.
Catherine P. Bradshaw Tracy Evian Waasdorp Asha Goldweber Sarah Lindstrom Johnson 《Journal of youth and adolescence》2013,42(2):220-234
Recent media attention has increased interest in behavioral, mental health, and academic correlates of involvement in bullying. Yet, there has not been much interest in investigating the co-occurrence of other health-risk behaviors, such as gang membership, weapon carrying, and substance use. The potential influence of contextual factors, such as youth ethnicity, urbanicity, and school characteristics, also has been overlooked in previous research. The current study examined different subtypes of involvement in bullying—as primarily a victim, as primarily a bully, as both a victim and bully, and no involvement—and the association with significant health-risk behaviors, including engaging in violence and substance use, as well as academic problems. The analyses use self-report data from 16,302 adolescents (50.3 % female, 62.2 % Caucasian, 37.8 % African American) enrolled in 52 high schools. A series of three-level HLM analyses revealed that bullies and bully/victims were generally at greatest of risk of being involved in violence, engaging in multiple types of substance use, and having academic problems. These findings extend prior research by emphasizing a potential link between involvement in bullying and multiple health-risk behaviors, particularly among urban and African American high school youth. 相似文献
309.
Asha Goldweber Tracy Evian Waasdorp Catherine P. Bradshaw 《Journal of youth and adolescence》2013,42(2):206-219
Research on the role of race and urbanicity in bullying involvement has been limited. The present study examined bullying involvement subgroups that relate to race, urbanicity, and the perceived reason for the bullying. Self-report data were collected from 10,254 middle school youth (49.8 % female; 62.4 % Caucasian, 19.0 % African American, and 5.6 % Hispanic) and latent class analyses were used to identify three subtypes of bullying involvement: low involvement (50 %), victim (31.3 %), and bully-victim (18.7 %). Irrespective of urbanicity (urban vs. non-urban), African American youth were more likely to be members of either the victim or bully-victim classes than the low involvement class. Further exploration of the community context suggested that urbanicity was associated with the increased likelihood of having been racially bullied. Urban bully-victims were also more likely to have been bullied about money than non-urban bully-victims. Findings underscore the importance of addressing both race and urbanicity for culturally sensitive prevention programming. 相似文献
310.
The positive youth development perspective, a strength-based relational developmental systems model that focuses on mutually influential relationships between individuals and contexts, has been used to study thriving across the second decade of life. However, more attention has been paid empirically to identifying the features of the individual (e.g., intentional self regulation, hope, or purpose) or to enumerating the role of context-general ecological assets than to the nature of individual-context relationships linked to thriving within specific contexts. The goal of this special section is to provide initial research reports about context-specific instances of the thriving process. The research focuses on two contexts where many youth spend a considerable amount, and often the majority, of their time—school and out-of-school time sports activities. 相似文献