全文获取类型
收费全文 | 1386篇 |
免费 | 50篇 |
专业分类
各国政治 | 121篇 |
工人农民 | 153篇 |
世界政治 | 121篇 |
外交国际关系 | 66篇 |
法律 | 518篇 |
中国政治 | 14篇 |
政治理论 | 435篇 |
综合类 | 8篇 |
出版年
2021年 | 4篇 |
2020年 | 17篇 |
2019年 | 42篇 |
2018年 | 47篇 |
2017年 | 54篇 |
2016年 | 39篇 |
2015年 | 28篇 |
2014年 | 46篇 |
2013年 | 233篇 |
2012年 | 35篇 |
2011年 | 50篇 |
2010年 | 26篇 |
2009年 | 36篇 |
2008年 | 51篇 |
2007年 | 43篇 |
2006年 | 52篇 |
2005年 | 52篇 |
2004年 | 58篇 |
2003年 | 44篇 |
2002年 | 45篇 |
2001年 | 15篇 |
2000年 | 26篇 |
1999年 | 21篇 |
1998年 | 24篇 |
1997年 | 22篇 |
1996年 | 18篇 |
1995年 | 18篇 |
1994年 | 24篇 |
1993年 | 22篇 |
1992年 | 15篇 |
1991年 | 18篇 |
1990年 | 15篇 |
1989年 | 15篇 |
1988年 | 11篇 |
1987年 | 11篇 |
1986年 | 9篇 |
1985年 | 16篇 |
1984年 | 9篇 |
1983年 | 23篇 |
1982年 | 10篇 |
1981年 | 12篇 |
1980年 | 10篇 |
1979年 | 9篇 |
1978年 | 4篇 |
1977年 | 10篇 |
1976年 | 4篇 |
1974年 | 7篇 |
1973年 | 4篇 |
1971年 | 4篇 |
1966年 | 4篇 |
排序方式: 共有1436条查询结果,搜索用时 15 毫秒
191.
The primary objective of this article is to develop a framework for examining the survival or demise of an accounting standards setting body, with specific emphasis on analyzing the survival potential of the proposed GASB (Government Accounting Standards Board). In meeting this objective, we will first contrast the survival of the Securities and Exchange Commission (SEC) with the demise of the Cost Accounting Standards Board (CASE), based on a framework derived from recent developments in agency theory.
The position taken in this article is neither that of an advocate nor an adversary of the various accounting regulatory bodies discussed. Instead, the authors' intent is to shed light on the complex issues surrounding the potential for survival of such bodies. An improved understanding of these issues should, in turn, permit a more enlightened analysis of the strengths and weaknesses of such bodies. 相似文献
The position taken in this article is neither that of an advocate nor an adversary of the various accounting regulatory bodies discussed. Instead, the authors' intent is to shed light on the complex issues surrounding the potential for survival of such bodies. An improved understanding of these issues should, in turn, permit a more enlightened analysis of the strengths and weaknesses of such bodies. 相似文献
192.
193.
194.
195.
Using qualitative methods, this study examined how, and under what circumstances, suicidal men used mental health services. In particular, the analyses focused on fragmented pathways to care. Fifteen men with a history of suicidal and aggressive behaviors and a diagnosis of borderline personality disorder and/or antisocial personality disorder participated in semistructured interviews that consisted of questions about their mental health status and experiences with mental health and addiction services. Interviews were taped and transcribed. An iterative, inductive qualitative analytic process was used. Men followed a cyclical pattern wherein negative experiences with health care providers were said to be followed by avoidance of health care settings, crisis, and then by involuntary service utilization. Men identified five health care provider and three personal practices, and two types of episodes they believed to contribute to their fragmented pathways to care. Implementation of specialized interventions, and providing patients with more information and more opportunity to participate in decisions, may improve interactions between patients and providers and improve patients' mental health status. 相似文献
196.
197.
198.
199.
Our headspace gas chromatographic flame ionization detection (HS-GC-FID) method for ethanol determination showed slightly, but consistently, low ethanol concentrations in whole blood (blood) in proficiency testing programs (QC-samples). Ethanol and acetaldehyde were determined using HS-GC-FID with capillary columns, headspace equilibration temperature (HS-T degrees ) of 70 degrees C and 20 min equilibration time (HS-EqT). Full factorial designs were used to study the variables HS-T degrees (50 degrees -70 degrees C), HS-EqT (15-25 min), ethanol concentration (0.20-1.20 g/kg) and storage at room temperature (0-6 days) with three sample-sets; plasma, hemolyzed blood and non-hemolyzed blood. A decrease in the ethanol concentration in blood was seen as a nearly equivalent increase in the acetaldehyde concentration. This effect was not observed in plasma, indicating chemical oxidation of ethanol to acetaldehyde in the presence of red blood cells. The variables showed different magnitude of effects in hemolyzed and non-hemolyzed blood. A decrease in ethanol concentration was seen even after a few days of storage and also when changing the HS-T degrees from 50 to 70 degrees C. The formation of acetaldehyde was dependent on all the variables and combinations of these (interactions) and HS-T degrees was involved in all the significant interaction effects. Favorable instrumental conditions were found to be HS-T degrees of 50 degrees C and HS-EqT of 15-25 min. The ethanol concentrations obtained for the range 0.04-2.5 g/kg after analyzing authentic forensic blood samples with a HS-T degrees of 50 degrees C were statistically significantly higher than at 70 degrees C (+0.0154 g/kg, p < 0.0001, n = 180). In conclusion, chemical oxidation of ethanol to acetaldehyde in the presence of red blood cells has been shown to contribute to lowered ethanol concentrations in blood samples. Storage conditions before analysis and the headspace equilibration temperature during analysis were important for the determination of blood ethanol concentrations. 相似文献
200.