全文获取类型
收费全文 | 16444篇 |
免费 | 858篇 |
专业分类
各国政治 | 724篇 |
工人农民 | 561篇 |
世界政治 | 1239篇 |
外交国际关系 | 520篇 |
法律 | 10951篇 |
中国共产党 | 1篇 |
中国政治 | 84篇 |
政治理论 | 3148篇 |
综合类 | 74篇 |
出版年
2021年 | 92篇 |
2020年 | 286篇 |
2019年 | 338篇 |
2018年 | 365篇 |
2017年 | 443篇 |
2016年 | 446篇 |
2015年 | 386篇 |
2014年 | 388篇 |
2013年 | 1625篇 |
2012年 | 365篇 |
2011年 | 444篇 |
2010年 | 429篇 |
2009年 | 450篇 |
2008年 | 428篇 |
2007年 | 388篇 |
2006年 | 409篇 |
2005年 | 382篇 |
2004年 | 405篇 |
2003年 | 365篇 |
2002年 | 356篇 |
2001年 | 718篇 |
2000年 | 625篇 |
1999年 | 481篇 |
1998年 | 271篇 |
1997年 | 208篇 |
1996年 | 189篇 |
1995年 | 192篇 |
1994年 | 225篇 |
1993年 | 212篇 |
1992年 | 324篇 |
1991年 | 348篇 |
1990年 | 325篇 |
1989年 | 338篇 |
1988年 | 308篇 |
1987年 | 312篇 |
1986年 | 338篇 |
1985年 | 324篇 |
1984年 | 254篇 |
1983年 | 270篇 |
1982年 | 186篇 |
1981年 | 192篇 |
1980年 | 134篇 |
1979年 | 221篇 |
1978年 | 139篇 |
1977年 | 128篇 |
1976年 | 114篇 |
1975年 | 84篇 |
1974年 | 124篇 |
1973年 | 119篇 |
1972年 | 103篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
The primary aim of this paper is to review the literature on preadolescent friendships in order to examine the relationship between preadolescent friendships and social support in adulthood. Social supports are important to health, both directly and as a stress buffer. Few studies, however, have specifically examined adult social supports from the perspective of their developmental precursors and critical developmental periods. Some data indicate that the preadolescent period may be of particular importance to the development of adult social skills and ties. Observational and empirical studies of preadolescent peer relationships, and in particular best friendships, suggest unique and critical contributions to adult social relatedness. Present research is suggestive but is insufficient to validate preadolescence as a critical period in adult social relatedness. Our review has implications for better understanding the mechanisms by which preadolescent friendships effect adult social support—an important mediator of the effects of stress on health. Further longitudinal study is needed.Received Ph.D. from University of Maryland. Research interests are social supports and psychological responses to trauma and disaster.Received M.D. from Yale University. Research interests are social supports and traumatic stress. 相似文献
72.
Presented in this paper are the initial results involving the use of the nose or outer ear as temperature measurement sites to determine the postmortem period of the human corpse. Simple mathematical models for both sites are developed based on cooling curves of five corpses. Analysis of errors between actual and calculated postmortem intervals suggest that in its present form, the described methods would not be suitable for use in accurately determining the time since death of human corpses. 相似文献
73.
苏联解体的原因与后果 总被引:3,自引:1,他引:2
1991年12月8日俄罗斯领导人Б.Н.叶利钦、乌克兰领导人Л.М.克拉夫丘克和白俄罗斯领导人С.С.舒什克维奇签署了别洛韦日协议,导致了苏联的解体;苏联解体是20世纪世界史上最重大的历史事件之一,这大概是大多数历史学家和政治学家对此的一致评价,而其他所有有关苏联解体的原因、后果等问题则一直是激烈争论的对象。 相似文献
74.
75.
Book Reviews in This Article:
Getting Rid of Patients: Contradictions in the Socialization of Physicians . By Terry Mizrahi
Physicians and Social Change . By John Colombotos and Corinne Kirchner
Changing Values in Medicine . Edited by Eric J. Cassell and Mark Siegler
Professional Ethics and Primary Care Medicine: Beyond Dilemmas and Decorum . By Harmon L. Smith and Larry R. Churchill
Physician—Patient Decision-Making: A Study in Medical Ethics . By Douglas N. Walton
With Dignity: The Search for Medicare and Medicaid . By Sheri I. David
The Dismissal of Students with Mental Disorders. Legal Issues, Policy Considerations, and Alternative Responses .
Courtroom Toxicology . By Marshall Houts, Randall C. Baselt, and Robert H. Cravey 相似文献
Getting Rid of Patients: Contradictions in the Socialization of Physicians . By Terry Mizrahi
Physicians and Social Change . By John Colombotos and Corinne Kirchner
Changing Values in Medicine . Edited by Eric J. Cassell and Mark Siegler
Professional Ethics and Primary Care Medicine: Beyond Dilemmas and Decorum . By Harmon L. Smith and Larry R. Churchill
Physician—Patient Decision-Making: A Study in Medical Ethics . By Douglas N. Walton
With Dignity: The Search for Medicare and Medicaid . By Sheri I. David
The Dismissal of Students with Mental Disorders. Legal Issues, Policy Considerations, and Alternative Responses .
Courtroom Toxicology . By Marshall Houts, Randall C. Baselt, and Robert H. Cravey 相似文献
76.
Steven B. Redd 《国际研究展望》2005,6(1):129-150
In the following paper, I analyze the influence of advisers and domestic political factors on President Clinton's decision to use force against Slobodan Milosevic and the Serbs in Kosovo in March 1999. I present an analysis and examination of President Clinton's decision-making process, using press reports, personal speeches, etc. In other words, I attempt to trace the process by which Clinton came to the decision to use force in Yugoslavia. Specifically, using the poliheuristic theory, I argue that President Clinton's decision was influenced by noncompensatory domestic political calculations and the strong influence of his Secretary of State, Madeleine K. Albright. Examining how advisers interact with one another, their status in the advisory group, and the manner in which presidents solicit information from advisers will further our understanding of how, when, and under what conditions national security-level decision makers make decisions. 相似文献
77.
Charles B. Fleming Richard F. Catalano Monica L. Oxford Tracy W. Harachi 《Journal of Quantitative Criminology》2002,18(4):423-439
The social development model (SDM) is a theory of behavior that has proven useful in explaining the etiology of delinquency, violence, and substance use among adolescents as well as early antisocial behavior among pre-adolescents. A further test of the model is its generalizability across population groups. A section of the SDM representing prosocial influences in the etiology of problem behavior was compared for boys and girls and for children from low- and non low-income families using three waves of child, parent and teacher survey data on a sample of 851 elementary school students. Multiple group structural equation modeling was used to assess differences across groups in both measurement of model constructs and hypothesized structural paths between constructs. The results indicate overall similarity in the reliability of measurement models and validity of structural models. 相似文献
78.
79.
80.
A dissecting intramural haematoma of the coronary artery is an infrequent cause of sudden and unexpected death. Most cases are women and in a significant number of these women, the haematoma occurred at term to 80 days postpartum. Because the intimal rupture and communication with the lumen were not found in most of the cases, the site of rupture has been considered to be a vasa vasorum. The authors report on a case of one woman who was at a later postpartum period (106 days). The microscopic finding of the dissected coronary artery revealed two intimal tears in a section. The case showed that the dissecting intramural haematoma of the coronary artery is caused not only by the rupture of the vasa vasorum but also by the rupture of the intima. 相似文献