全文获取类型
收费全文 | 17549篇 |
免费 | 1293篇 |
专业分类
各国政治 | 728篇 |
工人农民 | 573篇 |
世界政治 | 1333篇 |
外交国际关系 | 510篇 |
法律 | 12227篇 |
中国共产党 | 1篇 |
中国政治 | 119篇 |
政治理论 | 3216篇 |
综合类 | 135篇 |
出版年
2020年 | 392篇 |
2019年 | 414篇 |
2018年 | 505篇 |
2017年 | 545篇 |
2016年 | 563篇 |
2015年 | 508篇 |
2014年 | 505篇 |
2013年 | 1825篇 |
2012年 | 390篇 |
2011年 | 494篇 |
2010年 | 640篇 |
2009年 | 606篇 |
2008年 | 420篇 |
2007年 | 392篇 |
2006年 | 518篇 |
2005年 | 378篇 |
2004年 | 362篇 |
2003年 | 366篇 |
2002年 | 331篇 |
2001年 | 610篇 |
2000年 | 489篇 |
1999年 | 425篇 |
1998年 | 236篇 |
1997年 | 213篇 |
1996年 | 168篇 |
1995年 | 195篇 |
1994年 | 209篇 |
1993年 | 192篇 |
1992年 | 311篇 |
1991年 | 366篇 |
1990年 | 320篇 |
1989年 | 347篇 |
1988年 | 320篇 |
1987年 | 305篇 |
1986年 | 319篇 |
1985年 | 353篇 |
1984年 | 338篇 |
1983年 | 312篇 |
1982年 | 239篇 |
1981年 | 218篇 |
1980年 | 207篇 |
1979年 | 231篇 |
1978年 | 159篇 |
1977年 | 128篇 |
1976年 | 128篇 |
1975年 | 127篇 |
1974年 | 140篇 |
1973年 | 127篇 |
1972年 | 107篇 |
1971年 | 96篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
C J Kim B H Kwak S D Kim S P Kim 《The American journal of forensic medicine and pathology》1992,13(3):211-213
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
73.
74.
This methodological paper presents the utility of survival analysis methods to provide age adjustment in the analysis of domestic violence data. These methods improve the estimation of lifetime probability of domestic violence, improve identification of patterns of first victimization over the lifespan, and provide methods of testing risk factors for first victimization while adjusting for the respondents' age. Most importantly, these methods allow a new investigation of recall bias. Results suggest that lifetime probability of abuse may have been substantially underestimated in previous studies because of problems in recall/disclosure encountered by middle-aged women. 相似文献
75.
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
76.
77.
D Callahan 《American journal of law & medicine》1992,18(1-2):1-13
Proposals to ration health care in the United States meet a number of objections, symbolic and literal. Nonetheless, an acceptance of the idea of rationing is a necessary first step toward universal health insurance. It must be understood that universal health care requires an acceptance of rationing, and that such an acceptance must precede enactment of a program, if it is to be economically sound and politically feasible. Commentators have argued that reform of the health care system should come before any effort to ration. On the contrary, rationing and reform cannot be separated. The former is the key to the latter, just as rationing is the key to universal health insurance. 相似文献
78.
Incarceration rates in the United States dramatically increased over the past several decades. This trend has drawn significant academic attention to prison overcrowding and its potential effect on inmate misconduct. The empirical relationship between inmate misconduct and overcrowding, however, is less than clear. To be sure, studies indicating positive, negative, and null relationships can all be found in the literature. The current research subjects this body of literature to a meta-analysis in an effort to: (1) clarify the direction and strength of the relationship between overcrowding and rates of prison misconduct across all studies, and (2) to uncover the degree to which variation in research outcomes can be attributed to methodological differences across studies. Results indicate that prison crowding has little substantive impact on inmate misconduct. Implications of the findings are discussed in detail. 相似文献
79.
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
80.
The present study examines the extent to which neighborhood and social psychological influences predict childhood violence among 867 African‐American youth. The results showed that neighborhood affluence was the only neighborhood‐level variable to exert a significant influence on childhood violence. Furthermore, childhood violence was significantly related to social psychological influences, such as adopting a street code, associating with violent peers, parental use of violence, and quality parenting. Overall, the findings suggested that simply living in a violent neighborhood does not produce violent children, but that family, peer, and individual characteristics play a large role in predicting violence in childhood. 相似文献