首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   20181篇
  免费   669篇
各国政治   900篇
工人农民   1405篇
世界政治   1197篇
外交国际关系   915篇
法律   11668篇
中国政治   78篇
政治理论   4595篇
综合类   92篇
  2023年   69篇
  2021年   72篇
  2020年   234篇
  2019年   273篇
  2018年   1577篇
  2017年   1536篇
  2016年   1419篇
  2015年   388篇
  2014年   339篇
  2013年   1604篇
  2012年   502篇
  2011年   1207篇
  2010年   1312篇
  2009年   924篇
  2008年   1051篇
  2007年   1045篇
  2006年   374篇
  2005年   398篇
  2004年   527篇
  2003年   452篇
  2002年   316篇
  2001年   412篇
  2000年   345篇
  1999年   329篇
  1998年   186篇
  1997年   163篇
  1996年   154篇
  1995年   168篇
  1994年   175篇
  1993年   162篇
  1992年   215篇
  1991年   214篇
  1990年   204篇
  1989年   206篇
  1988年   183篇
  1987年   176篇
  1986年   170篇
  1985年   169篇
  1984年   148篇
  1983年   152篇
  1982年   115篇
  1981年   108篇
  1980年   73篇
  1979年   133篇
  1978年   96篇
  1977年   81篇
  1976年   64篇
  1975年   61篇
  1974年   83篇
  1973年   64篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
A 22-year-old Korean soldier, who had received blows to the neck and epigastrium from an officer 10 h earlier, suddenly died after massive hematemesis. He had been in relatively good health except for episodes of blood-tinged vomiting approximately 5 and 7 months prior to this event. Postmortem examination revealed angiodysplasia involving the gastroesophageal junction, and the stomach was distended with blood. No abnormal findings were present around the whole viscera, and the duodenum was free of blood. The pathologic significance of upper gastrointestinal angiodysplasia as a potential source of bleeding and a chronologic correlation between the trauma and bleeding are discussed.  相似文献   
92.
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   
93.
94.
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   
95.
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   
96.
97.
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   
98.
99.
100.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号