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   999篇
  免费   60篇
各国政治   65篇
工人农民   44篇
世界政治   61篇
外交国际关系   71篇
法律   451篇
中国政治   12篇
政治理论   343篇
综合类   12篇
  2023年   9篇
  2022年   5篇
  2021年   8篇
  2020年   25篇
  2019年   26篇
  2018年   31篇
  2017年   41篇
  2016年   57篇
  2015年   29篇
  2014年   45篇
  2013年   145篇
  2012年   41篇
  2011年   42篇
  2010年   32篇
  2009年   32篇
  2008年   27篇
  2007年   29篇
  2006年   41篇
  2005年   38篇
  2004年   29篇
  2003年   38篇
  2002年   34篇
  2001年   22篇
  2000年   16篇
  1999年   15篇
  1998年   18篇
  1997年   20篇
  1996年   6篇
  1995年   9篇
  1994年   7篇
  1993年   14篇
  1992年   4篇
  1991年   8篇
  1990年   9篇
  1989年   8篇
  1988年   8篇
  1987年   4篇
  1986年   7篇
  1985年   10篇
  1983年   6篇
  1982年   5篇
  1981年   7篇
  1980年   7篇
  1979年   6篇
  1978年   8篇
  1977年   6篇
  1976年   4篇
  1975年   4篇
  1974年   4篇
  1973年   4篇
排序方式: 共有1059条查询结果,搜索用时 0 毫秒
261.
262.
263.
264.
265.
At the turn of the twentieth century, many judges and juries considered libel law to be a robust check against a reckless and sensational press. So how did the newspaper industry convince seventeen state legislatures between 1885 and 1915 to pass laws easing liability for accidental libel? This article analyzes a debate surrounding libel law reform to tell the story of how retraction statutes were conceived in press association meetings, enacted in spite of lawyers' reservations, and challenged in state supreme courts during a pivotal era in the professionalization of journalism. It offers a better understanding of the power of the institutional press to influence Americans' conception of the purpose of press freedom and the role of journalism in democratic society, and a clearer picture of the beginnings of a more press friendly era in libel law, from the wire service defense to the actual malice standard.  相似文献   
266.
267.
268.
The federal budgeting process is now limited by deficit reduction policy constraints. This article examines the FY 1995 budget requests within the context of long term budget trends, changes in the federal budget process, and the recently established political and fiscal budget constraints. It further examines enactment of the Omnibus Budget Enforcement Act of 1993, the policy changes it contained, and its further tinkering with the process of budgeting. Finally the article evaluates the first budgeting process of the Clinton administration and their initiatives in deficit reduction following these policy constraints.  相似文献   
269.
Following a brief review of recent criticism of technical cooperation as an instrument for capacity building in sub-Saharan Africa, this article examines current strategies for addressing the professional staff retention problem within African governments, and for making the market for technical cooperation more effective by allowing greater substitution of national experts for expatriate experts in project design and implementation. In order to strengthen and effectively use scarce local expertise, while avoiding its diversion to donor-financed projects, the article proposes capacity-building strategies aimed at the development of national or regional markets for development analysis and management expertise in sub-Saharan Africa.  相似文献   
270.
Illicitly produced heroin is commonly cut with carbohydrates to increase bulk. The analysis of these solutes is important for legal and intelligence purposes. A capillary electrophoresis (CE) method was developed for the qualitative analysis of dextrose, lactose, sucrose, inositol, and mannitol in heroin exhibits. For this method, a 64 cm (55.5 cm to detector window) by 50 mum capillary was used with the Agilent Basic Anion Buffer modified to pH 12.1. This separation was performed at 25 degrees C with a voltage of 20 kV and indirect detection with 2,6-pyridinedicarboxylic acid as the visualization reagent. The methodology is also applicable for the screening of inorganic and organic anions using indirect detection, and acidic adulterants using direct detection. For a run time of 13 min, the relative standard deviation (n = 6) of the methodology was better than 0.36% for migration times and less than 2.6% for corrected peak areas. For the analysis of carbohydrates and acidic adulterants in seized heroin, excellent agreement was obtained between CE and nuclear magnetic resonance spectroscopy.  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