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   13571篇
  免费   413篇
各国政治   544篇
工人农民   610篇
世界政治   958篇
外交国际关系   503篇
法律   7908篇
中国共产党   34篇
中国政治   141篇
政治理论   3108篇
综合类   178篇
  2021年   75篇
  2020年   194篇
  2019年   181篇
  2018年   278篇
  2017年   320篇
  2016年   380篇
  2015年   290篇
  2014年   297篇
  2013年   1449篇
  2012年   308篇
  2011年   363篇
  2010年   298篇
  2009年   359篇
  2008年   424篇
  2007年   455篇
  2006年   420篇
  2005年   386篇
  2004年   386篇
  2003年   342篇
  2002年   378篇
  2001年   427篇
  2000年   399篇
  1999年   338篇
  1998年   216篇
  1997年   186篇
  1996年   191篇
  1995年   159篇
  1994年   167篇
  1993年   171篇
  1992年   249篇
  1991年   303篇
  1990年   253篇
  1989年   249篇
  1988年   262篇
  1987年   245篇
  1986年   271篇
  1985年   233篇
  1984年   189篇
  1983年   215篇
  1982年   144篇
  1981年   154篇
  1980年   129篇
  1979年   126篇
  1978年   117篇
  1977年   100篇
  1976年   90篇
  1975年   83篇
  1974年   94篇
  1973年   89篇
  1971年   63篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
961.
962.
963.
964.
965.
966.
967.
The authors describe the results obtained using the scanning electron microscope (SEM) to study drowned lungs and control lungs. Results are compared with a previous study carried out using laboratory animals. The results from both studies are analogous, in the absence of chronic pulmonary emphysema. The diagnosis of chronic pulmonary emphysema is simple with the SEM even when dealing with autoptic material obtained 24 to 48 h after death, but the diagnosis of drowning becomes difficult in lungs with chronic emphysema.  相似文献   
968.
Telephone conference calls could be used to extend participation in public decision-making. In order to clarify the involved problems and prospects we conducted 16 nine-member conference calls discussing and voting on a public issue. The discussions were recorded for analysis and a questionnaire was administered. The meetings worked well despite the isolation of the participants and the lack of visual contact. Access to the floor was easy, attention good, and participation was eager. The participants felt that the analysis of the topic had been effective. The chairman's guidance of the discussion was judged effective, and his actions legitimate. Additionally, the data suggest what we might call greater intellectual elbow room—less pressure to go along with the group opinion than in face-to-face meetings, and more ease in changing opinions and positions. The disagreements about the issue did not spill over into emotional hostility. The participants were quite pleased with the conduct and efficacy of the electronic meetings. These findings suggest that a mass participatory system, based upon such electronic meetings, can also be used to provide wider involvement in decision-making in our society.This study is part of a much larger project exploring the use of technology to extend political participation. The project is supported by the National Science Foundation, grant # GI-29940. Dr. Amitai Etzioni and Dr. Stephen Unger are Co-Principal Investigators for the MINERVA Project, which is being carried out at the Center for Policy Research in New York. The author is particularly indebted to Dr. Etzioni for many important contributions to the conception, design and analysis of the study reported in this paper. Dr. Unger also made significant contributions to the development of the study. Camille Gubello, Joshua Freeman and Nancy Gershon were of central importance in conducting the experiments, assembling the data and preparing this report.  相似文献   
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