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   10729篇
  免费   345篇
各国政治   635篇
工人农民   486篇
世界政治   743篇
外交国际关系   426篇
法律   6367篇
中国共产党   3篇
中国政治   82篇
政治理论   2245篇
综合类   87篇
  2020年   133篇
  2019年   178篇
  2018年   254篇
  2017年   281篇
  2016年   276篇
  2015年   192篇
  2014年   209篇
  2013年   1317篇
  2012年   268篇
  2011年   286篇
  2010年   237篇
  2009年   277篇
  2008年   315篇
  2007年   285篇
  2006年   316篇
  2005年   278篇
  2004年   314篇
  2003年   255篇
  2002年   264篇
  2001年   299篇
  2000年   306篇
  1999年   225篇
  1998年   161篇
  1997年   164篇
  1996年   140篇
  1995年   134篇
  1994年   130篇
  1993年   157篇
  1992年   210篇
  1991年   224篇
  1990年   205篇
  1989年   205篇
  1988年   188篇
  1987年   205篇
  1986年   198篇
  1985年   186篇
  1984年   174篇
  1983年   181篇
  1982年   106篇
  1981年   104篇
  1980年   93篇
  1979年   114篇
  1978年   79篇
  1977年   85篇
  1976年   68篇
  1975年   65篇
  1974年   68篇
  1973年   79篇
  1972年   65篇
  1968年   53篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
961.
962.
963.
This article presents a preliminary framework for exploring the intersection of science and racial politics in the public debate about race-based pharmaceuticals, especially among African Americans. It examines the influence of three political approaches to race consciousness on evaluations of racial medicine and offers an alternative critique.  相似文献   
964.
Really Responsive Regulation seeks to add to current theories of enforcement by stressing the case for regulators to be responsive not only to the attitude of the regulated firm but also to the operating and cognitive frameworks of firms; the institutional environment and performance of the regulatory regime; the different logics of regulatory tools and strategies; and to changes in each of these elements. The approach pervades all the different tasks of enforcement activity: detecting undesirable or non-compliant behaviour; developing tools and strategies for responding to that behaviour; enforcing those tools and strategies; assessing their success or failure; and modifying them accordingly. The value of the approach is shown by outlining its potential application to UK environmental and fisheries controls. Putting the system into effect is itself challenging but failing to regulate really responsively can constitute an expensive process of shooting in the dark.  相似文献   
965.
National Institute of Standards and Technology SRM 2372 human DNA quantitation standard has been produced to support the need for a human-specific DNA quantitation standard in forensic casework and calibration of new quantitative polymerase chain reaction (qPCR) assays. The conventional DNA concentration has been assigned with one of the U.S. National Reference UV/Visible Spectrophotometers, assuming an absorbance of 1.0 at 260 nm equals 50 ng/μL of double stranded DNA. In addition, an interlaboratory study has been conducted, to verify that the SRM 2372 materials perform well in currently used DNA quantitation assays by the forensic DNA community. Each unit of SRM 2372 consists of three well-characterized DNA extracts. Component A is a single-source human male material derived from blood. Component B is a multiple-source human female material derived from blood. Component C was purchased as a purified unsheared genomic human DNA (Sigma-Aldrich Co., St. Louis, MO) obtained as a lyophilized human genomic extract and has both male and female donors. SRM 2372 is intended to enable the comparison of DNA concentration measurements across time and place. Manufacturers can use SRM 2372 to validate the values assigned to their own reference materials. Individual forensic laboratories can use SRM 2372 to validate DNA quantitation methods and to verify the assigned concentration of in-house or commercial DNA calibration standards.  相似文献   
966.
Modern Ethiopia     
MUSTOE  N. E. 《African affairs》1962,61(244):216-222
This address by the chairman of the Anglo-Ethiopian Societywas given at a joint meeting of the Royal African Society, theRoyal Commonwealth Society and the Anglo-Ethiopian Society onMay 3, 1962. Lt.-Col. Neil McLean, D.S.O., M.P., took the chair  相似文献   
967.
968.
969.
970.
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