全文获取类型
收费全文 | 1945篇 |
免费 | 65篇 |
专业分类
各国政治 | 186篇 |
工人农民 | 83篇 |
世界政治 | 249篇 |
外交国际关系 | 164篇 |
法律 | 773篇 |
中国政治 | 24篇 |
政治理论 | 522篇 |
综合类 | 9篇 |
出版年
2023年 | 7篇 |
2022年 | 6篇 |
2021年 | 7篇 |
2020年 | 25篇 |
2019年 | 34篇 |
2018年 | 50篇 |
2017年 | 60篇 |
2016年 | 59篇 |
2015年 | 40篇 |
2014年 | 54篇 |
2013年 | 357篇 |
2012年 | 39篇 |
2011年 | 62篇 |
2010年 | 48篇 |
2009年 | 71篇 |
2008年 | 58篇 |
2007年 | 63篇 |
2006年 | 59篇 |
2005年 | 48篇 |
2004年 | 81篇 |
2003年 | 52篇 |
2002年 | 52篇 |
2001年 | 36篇 |
2000年 | 41篇 |
1999年 | 32篇 |
1998年 | 44篇 |
1997年 | 42篇 |
1996年 | 29篇 |
1995年 | 38篇 |
1994年 | 37篇 |
1993年 | 46篇 |
1992年 | 26篇 |
1991年 | 24篇 |
1990年 | 28篇 |
1989年 | 25篇 |
1988年 | 26篇 |
1987年 | 27篇 |
1986年 | 20篇 |
1985年 | 23篇 |
1984年 | 19篇 |
1983年 | 15篇 |
1982年 | 9篇 |
1981年 | 15篇 |
1980年 | 17篇 |
1979年 | 8篇 |
1977年 | 10篇 |
1976年 | 8篇 |
1975年 | 4篇 |
1974年 | 4篇 |
1973年 | 6篇 |
排序方式: 共有2010条查询结果,搜索用时 234 毫秒
121.
Lionel Tiger Gray L. Dorsey James T. Fisher Stephen J. Whitfield Abraham Edel 《Society》1995,32(3):79-96
He has also served as research director of the Guggenheim Foundation from 1972–1984. Among his books are Men in Groups; The Imperial Animal(with Robin Fox); The Manufacture of Evil;and The Pursuit of Pleasure. 相似文献
122.
123.
124.
Data from the Continuous Longitudinal Manpower Survey and the Current Population Survey were used to estimate the effects of CETA, a governmental jobs program, on the economic well-being of separated, divorced, and widowed women over age thirty. After training, CETA participants had increases in earnings and tended to have higher earnings than comparable CPS respondents. Participants in on-the-job training and public service employment had greater increases than participants in the other CETA programs. CETA enrollees with a high school degree had greater increases in earnings than those who had not completed high school, while whites had greater increases in earnings than non-whites. 相似文献
125.
126.
127.
The policy sciences have advanced in the past by introspection, and there appears to be a need for a return to such self-conscious examination of the field of inquiry. A design orientation offers a useful framework for such an examination. It requires reconsideration of some of the fundamental premises of policy inquiry. This article explores what impact design might have on the conventional process framework and then proceeds to discuss the development of a design perspective. 相似文献
128.
129.
What is the best sample for determining the early postmortem period by on-the-spot flow cytometry analysis? 总被引:8,自引:0,他引:8
Di Nunno N Costantinides F Cina SJ Rizzardi C Di Nunno C Melato M 《The American journal of forensic medicine and pathology》2002,23(2):173-180
The level of degradation of DNA as a means for determining the time of death has been proposed as a valid adjunct to the classic thanatochronologic methods. The twofold aim of this work was to determine which organ might reveal both a correlation between the percentage of degradation of the DNA and the time lapse since death, and would be easiest to sample and yield the most reproducible results even in technically unfavorable situations such as on-the-spot investigations at the scene of death. A comparison of the spleen, blood, and liver showed that hepatic tissue best meets these specific needs because it shows a virtually linear correlation between the time elapsed since death and the level of degradation of the DNA, and it can easily be sampled at the scene of death by use of a common biopsy needle. 相似文献
130.
Cohle SD Suarez-Mier MP Aguilera B 《The American journal of forensic medicine and pathology》2002,23(1):83-89
Sudden unexpected deaths in young persons with noncontributory histories, autopsy results, and drug screen results are a common problem in forensic pathology. As part of the evaluation of such cases, the cardiac conduction system (CCS) should be studied. To determine the type and incidence of lethal CCS lesions, the authors reviewed their files of sudden unexpected cardiac deaths with particular attention to cases with causes of death in the conduction system. Cases of sudden cardiac death in patients aged < or=40 years during a 10-year period (Michigan) and a 4 year-period (Spain) were selected from the files. From this group, cases were identified in which the cause of death was a lethal change in the CCS. The portions of the heart containing the CCS were excised, and at least one hematoxylin and eosin slide and at least one trichrome or elastic trichrome slide per block were studied. In the two centers, 381 cases of sudden cardiac death were identified. The most common causes of sudden cardiac death were arteriosclerotic narrowing of the coronary arteries, cardiomyopathy, and myocarditis. In 82 cases, there was no identifiable cause of death even after complete gross and microscopic autopsy was performed, a medical history was obtained, and a drug screen was performed. In 11 cases, the CCS contained lesions that were considered lethal: narrowing of the atrioventricular node artery by fibromuscular hyperplasia (7 cases) and atrioventricular node tumors (4 cases). The 11 cases accounted for 2.9% of the 381 cases of sudden cardiac death and 11.8% of the indeterminable cases. It was concluded that examination of the CCS in deaths in which the gross and microscopic autopsy, history, and drug screen fail to provide a cause of death can yield a cause of death in a significant percentage of cases. If heart block was not documented during life and no explanatory lesions were found during routine cardiac examination, examination of the CCS can yield valuable information. 相似文献