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   1546篇
  免费   85篇
各国政治   77篇
工人农民   114篇
世界政治   168篇
外交国际关系   111篇
法律   811篇
中国共产党   1篇
中国政治   22篇
政治理论   324篇
综合类   3篇
  2023年   20篇
  2022年   18篇
  2021年   45篇
  2020年   59篇
  2019年   72篇
  2018年   75篇
  2017年   76篇
  2016年   85篇
  2015年   62篇
  2014年   71篇
  2013年   239篇
  2012年   72篇
  2011年   63篇
  2010年   38篇
  2009年   49篇
  2008年   53篇
  2007年   75篇
  2006年   45篇
  2005年   46篇
  2004年   48篇
  2003年   47篇
  2002年   40篇
  2001年   25篇
  2000年   22篇
  1999年   11篇
  1998年   13篇
  1997年   11篇
  1996年   14篇
  1995年   13篇
  1994年   8篇
  1993年   15篇
  1992年   15篇
  1991年   12篇
  1990年   10篇
  1989年   9篇
  1988年   7篇
  1987年   5篇
  1985年   3篇
  1984年   9篇
  1983年   2篇
  1982年   3篇
  1981年   2篇
  1980年   2篇
  1979年   3篇
  1978年   3篇
  1977年   4篇
  1970年   2篇
  1969年   3篇
  1967年   1篇
  1966年   1篇
排序方式: 共有1631条查询结果,搜索用时 15 毫秒
21.
22.
23.
24.
25.
26.
In this study, a new method was developed for the impurity profiling of illicit MDMA tablets. The extraction efficiency, linearity, repeatability and reproducibility of the method were evaluated. Eighty two MDMA tablets coming from presumed unrelated large seizures in 2004 (n >500 tablets) were analyzed by gas chromatography mass spectrometry (GC-MS) in order to assess the discrimination power of the method. The latter was found to be practical, robust, relatively easy to perform, highly discriminative and yielding good chromatography. In addition, some new impurities were detected and identified. Their chemical structures and mass spectra are reported.  相似文献   
27.
28.
Within the context of transboundary disputes, this paper seeks to determine which liability concept, negligence or strict liability, performs better when assets are secure against foreign claims for transboundary damages. Our results indicate that, if assets are hidden from foreign claims, strict liability will not implement the socially optimal outcome, but neither will negligence. However, even though the socially optimal outcome is not always achieved, strict liability weakly dominates negligence. These results suggest that the harmonization of statues that deal with transboundary pollution should be based on strict liability not negligence. JEL classification K32 · Q5 Smith and Eckert both thank SSHRC of Canada for financial assistance. We thank two referees for valuable comments that greatly improved the paper and Matt Smith for his research assistance. All remaining errors are our responsibility.  相似文献   
29.
In the battle to curry the favour of the fast-food consumer,McDonald's collided head on with its competitor Burger Kingat the beginning of this year; the key question in this disputewas whether Burger King was entitled to use the famous characterRonald McDonald in its commercials or whether, by doing so,Burger King was infringing the trade mark rights of McDonald's.  相似文献   
30.
This article presents a case study of a project known as 'Designing Better Health Care in the South' that attempted to transform four separately incorporated health services in southern Adelaide into a single regional health service. The project's efforts are examined using Kotter's (1996) model of the preconditions for transformational change in organisations and the areas in which it met or failed to meet these preconditions are analysed, using results from an evaluation that was commenced during the course of the attempted reform. The article provides valuable insights into an attempted major change by four public sector health organisations and the facilitators and barriers to such change. It also examines the way in which forces beyond the control of individual public sector agencies can significantly impact on attempts to implement organisational change in response to an identified need. This case study offers a rare glimpse into the micro detail of health care reform processes that are so widespread in contemporary health services but which are rarely systematically evaluated.  相似文献   
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