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   7310篇
  免费   491篇
各国政治   345篇
工人农民   242篇
世界政治   486篇
外交国际关系   242篇
法律   5096篇
中国政治   37篇
政治理论   1314篇
综合类   39篇
  2020年   162篇
  2019年   177篇
  2018年   190篇
  2017年   219篇
  2016年   224篇
  2015年   206篇
  2014年   191篇
  2013年   760篇
  2012年   154篇
  2011年   174篇
  2010年   208篇
  2009年   229篇
  2008年   171篇
  2007年   167篇
  2006年   176篇
  2005年   164篇
  2004年   186篇
  2003年   165篇
  2002年   140篇
  2001年   313篇
  2000年   255篇
  1999年   230篇
  1998年   103篇
  1997年   71篇
  1996年   72篇
  1995年   80篇
  1994年   87篇
  1993年   87篇
  1992年   153篇
  1991年   157篇
  1990年   148篇
  1989年   156篇
  1988年   122篇
  1987年   139篇
  1986年   124篇
  1985年   134篇
  1984年   102篇
  1983年   117篇
  1982年   82篇
  1981年   79篇
  1980年   55篇
  1979年   109篇
  1978年   69篇
  1977年   58篇
  1976年   50篇
  1975年   47篇
  1974年   55篇
  1973年   55篇
  1972年   44篇
  1968年   41篇
排序方式: 共有7801条查询结果,搜索用时 15 毫秒
991.
The association of simultaneous abnormalities of the thyroid and thymus is well documented, particularly in the case of Graves' disease. We present a case of a natural death following thyroid storm in which marked thymic hyperplasia was present. This finding can be helpful in determining the cause of death.  相似文献   
992.
Modern liberal theories share the idea that the state and its laws should remain neutral with respect to the varying conceptions of the good life held by individuals. This article discusses the way in which this notion of neutrality is defined and justified. Rawls's theory of justice is shown to be a prime example of such a theory. Questions are raised, however, if Rawls's theory has adequately formulated the conditions that would make it possible for each citizen to fulfill his own conception of the good. After arguing that Dworkin's solution to this problem is also problematic, it is argued that Sen's solution to the question of what conditions create neutrality shows the way ahead.  相似文献   
993.
994.
An ultrathin-layer polyacrylamide gel isoelectric focusing technique that uses a composite of ampholytes from three commercial sources is described for subtyping esterase D. All common allelic products of esterase D were separated clearly. The technique described in this paper provides a higher conclusive call rate on known blood specimens (95.8%) and questioned bloodstains (69.7%) compared with continuous zone electrophoresis in agarose gels (89.9 and 37.6%, respectively).  相似文献   
995.
996.
997.
Policy analysis in the U.S. and Canada tends to follow the methods of systems analysis and takes into account variables relating to substantive matters as well as political and administrative constraints that governments face in pursuing different alternatives.Comparative analysis of the political effectiveness of the two governments in implementing the results of analysis indicates that Canada has built-in constitutional advantages. Comparative assessment of bureaucratic skills in policy analysis and policy implementation suggests that the American system is relatively weaker in terms of implementation, but relatively stronger in terms of policy analytical skills. This is followed by an assessment of the attempts made by the U.S. government to improve its policymaking structures through the setting up of the Domestic Council and the reorganized OMB, and the Canadian attempts to improve its policymaking capabilities through a reorganized Cabinet committee system and the strengthening of the Privy Council Office.The final section suggests that analysis of values and norms should be an integral part of policy analysis. The scope of policy analysis should be extended to include long-term economic and political analyses.  相似文献   
998.
As consultation-liaison psychiatrists to a cardiac transplantation team, we have observed various informed consent issues that are particularly associated with evaluation for cardiac transplantation. We discuss complicating factors that relate to each component of informed consent and present the defense mechanism of denial as a barrier to making the decision to accept or refuse transplantation. Changes in the evaluation protocol could preclude existing impediments to provision of information and patient autonomy; however, certain intrapsychic issues must be recognized as ongoing clinical realities to be addressed as the doctrine of informed consent continues to evolve.  相似文献   
999.
1000.
The microscopical examination of original surfaces on casework sized glass particles using an interference objective and the interpretation of their interferograms is discussed. To reduce subjectivity, a numerical criterion was devised to assess the curvature of glass particles and this was then applied to a survey of window, container, tableware and vehicle glasses. Objects with curved surfaces produced particles that were distinctly curved while those from surfaces of both modern and old windows were clearly identifiable as flat. Apparently flat surfaces from tableware and containers almost always yielded specimens that were detectably curved. In addition, there was no evidence that a fracture surface would be confused with an original surface from a plain flat glass.In a ‘blind’ trial to assess the interferometric routines, three examiners correctly identified flat and curved surfaces on 15 particles derived from a selection of glass objects.  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