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   26063篇
  免费   787篇
  国内免费   5篇
各国政治   1121篇
工人农民   1427篇
世界政治   1567篇
外交国际关系   864篇
法律   16316篇
中国共产党   9篇
中国政治   199篇
政治理论   5110篇
综合类   242篇
  2020年   306篇
  2019年   391篇
  2018年   812篇
  2017年   896篇
  2016年   813篇
  2015年   431篇
  2014年   439篇
  2013年   2379篇
  2012年   699篇
  2011年   942篇
  2010年   877篇
  2009年   783篇
  2008年   919篇
  2007年   932篇
  2006年   729篇
  2005年   667篇
  2004年   678篇
  2003年   674篇
  2002年   599篇
  2001年   853篇
  2000年   746篇
  1999年   619篇
  1998年   353篇
  1997年   279篇
  1996年   301篇
  1995年   284篇
  1994年   295篇
  1993年   302篇
  1992年   471篇
  1991年   499篇
  1990年   480篇
  1989年   433篇
  1988年   450篇
  1987年   428篇
  1986年   467篇
  1985年   411篇
  1984年   379篇
  1983年   370篇
  1982年   259篇
  1981年   278篇
  1980年   190篇
  1979年   276篇
  1978年   194篇
  1977年   178篇
  1976年   152篇
  1975年   176篇
  1974年   185篇
  1973年   164篇
  1972年   152篇
  1969年   133篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
53.
54.
The rare event of a corpse immersed in glacier ice becoming exposed on a glacier surface is closely connected with the glaciological conditions at the scene and the site of the accident. Provided that the time since death is known, certain questions relative to the circumstances of a mountain accident can only be answered by considering glaciological aspects. How the scene of an accident can be reconstructed by inference from the site of discovery is discussed by means of three exemplary cases that occurred on Tyrolean glaciers (Austria) during the past 40 years: (1) Two corpses were discovered close above the equilibrium line in the accumulation area after 25 years. The two victims had fallen down a rock face after the breaking off of a cornice and had come to rest in the uppermost part of the accumulation area. (2) A victim was discovered in the lower ablation area 8 years after falling down a crevasse in the middle part of the ablation area. (3) A female alpinist was discovered at the very end of the glacier after 29 years; it was concluded that the accident must have happened in the accumulation area.  相似文献   
55.
This paper links the policy context regarding S&T parks to the objectives and characteristics of the established parks and incubators in a relatively small, converging European country. S&T parks and incubators in Greece during the past decade and a half have gradually shifted in terms of ownership and management from university/research institute to the private sector and in terms of financing from public to private funds, also involving the provision of seed capital and access to venture capital. This gradual shift toward more private engagement has created a variety of models out of which, it is hoped, successful innovative companies will emerge in larger numbers than in the past.
  相似文献   
56.
Criminologists have long debated the issue of how to define crime, and hence, the scope of criminological inquiry. For years, some critical criminologists have argued for expanded definitions of crime that include harmful behaviors of the state that may not be officially defined as criminal. Other critical criminologists have argued that existing legal frameworks may be used to study varieties of state crime, and that defining the harmful actions of the state as criminal is important to help mobilize public support for their control. In this paper, we first trace the historical development of these two perspectives, and then offer a tentative solution to the seeming tension between these two perspectives.  相似文献   
57.
58.
59.
60.
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