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   1386篇
  免费   50篇
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
  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   
192.
193.
194.
195.
Strike C  Rhodes AE  Bergmans Y  Links P 《危机》2006,27(1):31-38
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.
Underwood A 《Newsweek》2006,148(24):69-70, 73
  相似文献   
198.
Underwood A 《Newsweek》2006,148(17):65
  相似文献   
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.
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