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   11480篇
  免费   375篇
各国政治   636篇
工人农民   499篇
世界政治   754篇
外交国际关系   438篇
法律   6719篇
中国共产党   3篇
中国政治   82篇
政治理论   2624篇
综合类   100篇
  2020年   141篇
  2019年   188篇
  2018年   265篇
  2017年   300篇
  2016年   296篇
  2015年   206篇
  2014年   209篇
  2013年   1394篇
  2012年   281篇
  2011年   289篇
  2010年   252篇
  2009年   275篇
  2008年   331篇
  2007年   293篇
  2006年   333篇
  2005年   300篇
  2004年   317篇
  2003年   281篇
  2002年   286篇
  2001年   323篇
  2000年   313篇
  1999年   235篇
  1998年   174篇
  1997年   164篇
  1996年   143篇
  1995年   153篇
  1994年   145篇
  1993年   153篇
  1992年   216篇
  1991年   234篇
  1990年   227篇
  1989年   226篇
  1988年   207篇
  1987年   222篇
  1986年   218篇
  1985年   203篇
  1984年   200篇
  1983年   204篇
  1982年   133篇
  1981年   115篇
  1980年   99篇
  1979年   123篇
  1978年   104篇
  1977年   99篇
  1976年   82篇
  1975年   77篇
  1974年   89篇
  1973年   91篇
  1972年   74篇
  1968年   64篇
排序方式: 共有10000条查询结果,搜索用时 743 毫秒
991.
Violence, attempted escapes, thefts, persistent rule violations, and other extreme forms of maladaptive prison behavior have created problems for correctional authorities since congregate confinement became the watchword in American corrections. The evolution of prisoner classification programs has aided prison administrators in their attempts to recognize potential behavioral problems but the subjective nature of a number of state classification models has resulted in a continuous wave of litigation and fiscal constraints. The objective of this paper is to provide a prediction model to assist in the classification of adult prisoners. Data on all members of the Georgia adult, male prison population from 1971 to 1978 were used as a baseline. A sample was chosen from inmates in long-term disciplinary segregation whose files contained all necessary demographic, psychometric and judicial variables. A discriminant analysis of these two groups identified 14 variables which correctly assigned inmates in 85% of the cases. The predictive variables include both demographic and personality characteristics.  相似文献   
992.
During the past two decades Nigeria has invested heavily in scientific research, by developing country standards. Yet these investments at best have had only marginal impacts on the activities of the production and service sectors even though there are many priority development activities which could benefit from inputs from Nigerian researchers. At the national level efforts to direct or even co-ordinate the planning and budgeting of research have been seriously hampered by frequent changes in organizational responsibilities and by repeated budget cuts. Historically, the activities of the federal research institutes have been poorly tuned to the interests and capabilities of the potential users of their research products. Neither these institutes nor the universities with research activities are in a position to develop products or processes which can compete with imported technologies that are saturating the economy. However, the research institutes, and to a lesser extent the universities, should make greater contributions in applying science to improved use of the nation's natural resource endowments, although significant changes in research management at the project level are needed if this objective is to be realized. The Government should provide incentives to the multinational companies operating in Nigeria to develop joint programmes with the research institutes and universities as one mechanism for diffusing the administrative and technical capabilities of the companies. Meanwhile, selected public sector enterprises should be encouraged to expand technological innovation efforts which could be directly applied to their production activities.  相似文献   
993.
This article explores the construction and reworking of paradigms of culture contact and identity by social scientists and cultural critics in response to contradictory sociocultural experiences of modernity in Peru and Mexico. It seeks to do so in the context of calls made by the Peruvian critic Antonio Cornejo Polar for greater historicism and critical thinking about these, and the concern that this appeal has since generated in the field of Latin American Cultural Studies. Focusing first on the postcolonial, ideologically driven model of 'mestizaje', the article then traces continuities and discontinuities between it and latter–day thinking about cultural pluralism.  相似文献   
994.
995.
996.
997.
998.
999.
Two cases of fatal overdose with morphine are presented. Large amounts of the drug were involved in both cases, one by oral ingestion, the other by intravenous injection. Morphine concentrations in various body fluids and tissues are compared to those in the literature.  相似文献   
1000.
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