全文获取类型
收费全文 | 18293篇 |
免费 | 314篇 |
专业分类
各国政治 | 518篇 |
工人农民 | 1489篇 |
世界政治 | 779篇 |
外交国际关系 | 595篇 |
法律 | 11134篇 |
中国共产党 | 34篇 |
中国政治 | 131篇 |
政治理论 | 3790篇 |
综合类 | 137篇 |
出版年
2021年 | 66篇 |
2020年 | 158篇 |
2019年 | 148篇 |
2018年 | 1447篇 |
2017年 | 1411篇 |
2016年 | 1259篇 |
2015年 | 291篇 |
2014年 | 247篇 |
2013年 | 882篇 |
2012年 | 424篇 |
2011年 | 1156篇 |
2010年 | 1183篇 |
2009年 | 824篇 |
2008年 | 1046篇 |
2007年 | 1004篇 |
2006年 | 344篇 |
2005年 | 367篇 |
2004年 | 472篇 |
2003年 | 385篇 |
2002年 | 271篇 |
2001年 | 356篇 |
2000年 | 330篇 |
1999年 | 262篇 |
1998年 | 166篇 |
1997年 | 123篇 |
1996年 | 159篇 |
1995年 | 142篇 |
1994年 | 154篇 |
1993年 | 127篇 |
1992年 | 198篇 |
1991年 | 250篇 |
1990年 | 212篇 |
1989年 | 198篇 |
1988年 | 221篇 |
1987年 | 202篇 |
1986年 | 220篇 |
1985年 | 194篇 |
1984年 | 172篇 |
1983年 | 167篇 |
1982年 | 106篇 |
1981年 | 122篇 |
1980年 | 102篇 |
1979年 | 108篇 |
1978年 | 97篇 |
1977年 | 86篇 |
1976年 | 64篇 |
1975年 | 64篇 |
1974年 | 66篇 |
1973年 | 77篇 |
1971年 | 50篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
901.
Steven L. Berman Carl F. Weems Timothy R. Stickle 《Journal of youth and adolescence》2006,35(3):285-292
Existential anxiety is hypothesized to be a core human issue in a great deal of theoretical and philosophical writing. However, little is known about the emergence of these concerns and their relation to emotional functioning in youth. The purpose of this study was to examine the phenomenon of existential anxiety in a sample of adolescents. Data on existential concerns, identity development and psychological symptoms were collected on a sample of 139 youth in grades 9–12. Results indicated that existential anxiety concerns have a theoretically consistent factor structure, are common among adolescents, and are associated with psychological symptoms, as well as identity issues. Results are discussed with regard to the importance of existential concerns in the lives of youth and the need for additional research.Received PhD from Florida International University. Interests are identity development including associated anxiety and distress, cross-national comparisons, and the development of identity interventions.Received PhD from Florida International University. Interests focus on the developmental psychopathology of anxiety and depression.Received PhD from the University of Arizona. Interests include a range of topics in developmental psychopathology, prevention, program evaluation, and research methodology. 相似文献
902.
The purpose of the current study was to investigate the relationship between child maltreatment, social support, and developmental outcomes in first-year college students. Participants were 202 undergraduate students (137 female, 65 male) who completed surveys at two time points: once before entering college and once during their first year of college. It was hypothesized that child maltreatment would predict poorer developmental outcomes in adolescence and early adulthood, but that social support would mediate this relationship. Results indicated that child maltreatment related negatively to developmental outcomes and to perceived social support; adolescent and young adult development related positively to perceived social support. In addition, a mediational model in which social support mediates child maltreatment and developmental outcomes was supported.
相似文献
Elise N. PepinEmail: |
903.
Based on 10 weekly telephone interviews with first-year college students (N=202; 63% women; M=18.8 years, SD=.4), within- and between-person associations of positive and negative affect with alcohol use were examined. Multi-level models confirmed hypothesized within-person associations between weekly positive affect and alcohol use: Higher positive affect weeks had greater alcohol consumption, more drinking and heavy drinking days in the same week, and less plans to drink the following week. However, between-person, average positive affect did not predict individual differences in alcohol use. The negative affect—alcohol use association was complex: Within-person, higher negative affect was associated with less drinking days but between-person, with more drinking days; lability in negative affect was associated with greater average alcohol use and more drinking and heavy drinking days. Health promotion efforts for late adolescent and emerging adult students are advised to recognize these paradoxical effects (e.g., promoting dry celebratory campus-events, strategies to manage negative mood swings).
相似文献
Jennifer L. MaggsEmail: |
904.
Nancy Darling Patricio Cumsille Linda L. Caldwell Bonnie Dowdy 《Journal of youth and adolescence》2006,35(4):659-670
Adolescents’ willingness to share information with parents is a central process through which parents gain knowledge of their adolescents’ lives. This paper addresses four questions important to understanding adolescents’ decisions to voluntarily disclose areas of parent-adolescent disagreement: What are the contribution of parent-adolescent agreement and adolescents’ non-disclosure of disagreement to adolescents’ perceptions of parental knowledge?; Which adolescents are most likely to disclose to parents in case of disagreement?; Under what conditions are adolescents more or less likely to disclose disagreement?; and What type of non-disclosure will different adolescents use and under what conditions? Self-report data from 120 adolescents (M age=15.8) revealed that failure to disclose disagreement, but not overall agreement, predicted perceived parental knowledge. Adolescents from authoritative homes and those less involved in disapproved leisure were more likely to disclose disagreement and less likely to lie. Within-person differences in disclosure were predicted by the presence of explicit rules and adolescents’ beliefs about required obedience.Dr. Darling is a developmental psychologist whose research focuses on social relationships during adolescence, with a special interest in contextual variation in developmental processes. Correspondence should be addressed to Dr. Darling atDr. Cumsille is a developmental methodologist whose research focuses on adolescent well-being.Dr. Caldwell's research focuses on the experience of adolescent leisure, with a particular interest in adolescent boredom and well-being.Dr. Dowdy is a developmental psychologist specializing in adolescent social relations. 相似文献
905.
A 2006 trend survey found that Americans most often select localgovernment as giving them the most for their money, followedby the federal and state governments. African Americans aremost supportive of the federal government as giving them themost for their money; Hispanics are most supportive of localgovernment. As in many previous years, the local property taxwas viewed as the worst tax, followed by the federal incometax, state sales tax, and state income tax. Americans displayedreduced trust and confidence in the federal government; however,trust in all three spheres of governmentfederal, state,and localdropped between 2004 and 2006, possibly reflectiveof the poor response of all governments to Hurricane Katrina.Analysis of surveys since 1972 reveals that there has been along-term decline in the public's support for the federal governmentand a corresponding increase in support of state and especiallylocal governments. 相似文献
906.
907.
908.
909.
Collaboration and Leadership for Effective Emergency Management 总被引:6,自引:4,他引:6
Collaboration is a necessary foundation for dealing with both natural and technological hazards and disasters and the consequences of terrorism. This analysis describes the structure of the American emergency management system, the charts development of the Federal Emergency Management Agency, and identifies conflicts arising from the creation of the Department of Homeland Security and the attempt to impose a command and control system on a very collaborative organizational culture in a very collaborative sociopolitical and legal context. The importance of collaboration is stressed, and recommendations are offered on how to improve the amount and value of collaborative activities. New leadership strategies are recommended that derive their power from effective strategies and the transformational power of a compelling vision, rather than from hierarchy, rank, or standard operating procedures. 相似文献
910.
This paper examines a number of demographic aspects in congressional districts and states that played important roles in a series of Congressional votes on environmental issues in 2000. These characteristics include urbanization or population density, education, income, race, and employment. Our findings are mixed. While we find some evidence (at least in Senate votes) that population density is a positive predictor of “pro-environment” votes, we also find that things commensurate with the Environmental Kuznets Curve such as income, education, and lifestyle also play an important role in environmental voting. 相似文献