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   17180篇
  免费   456篇
各国政治   713篇
工人农民   677篇
世界政治   1417篇
外交国际关系   584篇
法律   10298篇
中国共产党   2篇
中国政治   76篇
政治理论   3693篇
综合类   176篇
  2020年   211篇
  2019年   250篇
  2018年   329篇
  2017年   394篇
  2016年   415篇
  2015年   286篇
  2014年   338篇
  2013年   1662篇
  2012年   403篇
  2011年   431篇
  2010年   343篇
  2009年   384篇
  2008年   440篇
  2007年   458篇
  2006年   444篇
  2005年   397篇
  2004年   398篇
  2003年   420篇
  2002年   382篇
  2001年   680篇
  2000年   617篇
  1999年   510篇
  1998年   285篇
  1997年   244篇
  1996年   203篇
  1995年   204篇
  1994年   246篇
  1993年   217篇
  1992年   341篇
  1991年   372篇
  1990年   326篇
  1989年   346篇
  1988年   320篇
  1987年   336篇
  1986年   338篇
  1985年   331篇
  1984年   289篇
  1983年   319篇
  1982年   256篇
  1981年   238篇
  1980年   179篇
  1979年   248篇
  1978年   166篇
  1977年   146篇
  1976年   132篇
  1975年   122篇
  1974年   137篇
  1973年   118篇
  1972年   113篇
  1971年   98篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
131.
Postmortem examination of a former professional basketball player revealed an abnormal heart, most notably a single coronary artery. The literature on single coronary arteries is briefly reviewed, and the possible mechanism which caused the patient's condition is considered. This case is particularly unusual because of the patient's profession, which is so physically demanding.  相似文献   
132.
The fingernail ridge patterns of a pair of identical twins were compared to each other, their parents, and an unrelated subject. The patterns of the twins' nails showed regions of strong similarity but were distinguishable from one another. Fewer similarities were found when comparing the nails to those of the parents and the unrelated control. The twins were shown to be monozygotic by means of DNA profiling. This therefore represents the first demonstration of unique fingernail ridge patterns in subjects shown conclusively to be identical twins. When the fingernail ridge patterns were examined with a scanning electron microscope, the backscattered electron (BEI) images were found to have superior contrast when compared to the secondary electron (SEI) images.  相似文献   
133.
134.
135.
136.
This paper applies the poliheuristic theory of foreign policy decision making to non-democratic states. Poliheuristic theory asserts that state leaders assign primary importance to their political survival; however, the meaning of "the political" varies dramatically from country to country. Furthermore, the types of actors who hold leaders politically accountable also vary between countries. Consequently, leaders often pursue vastly different means of ensuring their political survival. The author uses the common distinction between single-party, military, and personalist autocracies to show that apparently arbitrary differences in autocratic leaders' political concerns actually vary in systematic and potentially predictable ways. Because this argument is generalized to non-democratic states as a whole, it has important implications for the ways in which democratic states craft their policies toward autocracies.  相似文献   
137.
138.
139.
140.
Large-scale privatization is an unfamiliar area of public policy. The practice and study of property reforms and privatization needs to include mesolvel phenomena such as laws, regulations, institutions and standard operating procedures. There has been little comparative analysis of privatization programs around the world. The author argues that analysts should compare the most immediately relevant institutional environment of the enterprise. Conceptually, this mesolevel system is situated between the firm and the macroeconomy. This system of action is especially fruitful for cross-national comparisons of privatization programs because it is at this level that privatization strategies are designed. The problem for Eastern Europe and for less-developed countries is lack of experience with the relatively light economic regulation that characterizes industrial countries. Government leaders must also decide how much effort to devote to privatization of state-owned enterprises and how much to fostering private sector investment in new firms. Ernest J. Wilson, III is affiliated with the National Security Council, Washington, D.C.  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