全文获取类型
收费全文 | 1939篇 |
免费 | 65篇 |
专业分类
各国政治 | 186篇 |
工人农民 | 82篇 |
世界政治 | 243篇 |
外交国际关系 | 164篇 |
法律 | 774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 | 49篇 |
2017年 | 58篇 |
2016年 | 59篇 |
2015年 | 40篇 |
2014年 | 54篇 |
2013年 | 352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 | 53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 | 27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2004条查询结果,搜索用时 15 毫秒
121.
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
122.
123.
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
124.
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
125.
Tumescent liposuction is a common cosmetic procedure that is performed as an outpatient service in physician's offices and is largely believed to be safe. The protuberant areas of the body containing the undesirable fat deposits are injected with normal saline containing lidocaine and epinephrine for pain control and hemostasis, and the waterlogged cells are suctioned out via cannula through a small incision. We recently encountered three cases in which deaths were attributed to this procedure. Two showed fat embolization in the lung and one died from fluid overload. The osmium tetroxide post-fixed lung sections showed fat emboli in the interstitial capillaries and arterioles. We reviewed the recent literature and found that pulmonary thromboemboli, fat embolization, fluid overload, and lidocaine and epinephrine intoxication are found at autopsy in many cases. Forensic pathologists responsible for determining the cause and manner of death should become familiar with the postmortem findings and risks of liposuction therapy and communicate them to their clinical colleagues and communities. 相似文献
126.
127.
Although we readily scrutinize conflicts among political stakeholders, similar attention is seldom paid to how we deal with contestable understandings within our own field of inquiry. Debates over competing scholarly perspectives and contested models are rarely subject to any systematic postmortem or attempts to account for differential survival. Given the indeterminacy of many of our conceptual schemes, empirical data seldom carry the day to a resolution all can accept. Accordingly, there are eventually many different versions of any given dispute, each offering a different path to resolution or equanimity. Disputants retire and conflicts fade, providing a demographic resolution of sorts, but not a scientific or a conceptual one. The work presented here claims that there is much to be gained from systematic scrutiny of our conceptual disputes, especially as a means to access the different perspectives we assume to handle them. We argue that there is an internal logic to the different perspectives on any given dispute. It is not the dispute per se that draws our interest; but rather, how any given dispute generates multiple interpretations and reconstructed versions. We propose and illustrate an approach to analyzing disputes that makes their internal logic more transparent and attends to the pathways that emerge for resolution. We will find, in the process, that there are some reliable routes to conciliation and some fault lines that remain unstable. 相似文献
128.
Despite the hypothesized propensity for shirking to marklegislative institutions, the evidence is rather equivocal;moreover, most of the research has focused exclusively onlegislator voting, thereby constraining whatevergeneralizations might emerge. The purpose of this paper is tocontribute to the debate over the question of politicalshirking by extending the range of phenomena examined toinclude congressional foreign travel. Our analysis providesevidence that opportunism is a problem in Congress. We findthat last-period problems have arisen in the area of foreigntravel, and that increased scrutiny to the problem on the partof Congress only shifted consumption patterns, i.e.,legislators began taking foreign junkets near, but not at theend of, their legislative careers. Not all foreign travelshould be construed as worthless junketing since there isstrong evidence that some foreign travel is related tomembers' responsibilities on congressional committees. 相似文献
129.
130.