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   69337篇
  免费   3007篇
各国政治   4469篇
工人农民   2951篇
世界政治   6011篇
外交国际关系   3864篇
法律   32440篇
中国共产党   43篇
中国政治   792篇
政治理论   20750篇
综合类   1024篇
  2021年   407篇
  2020年   1172篇
  2019年   1526篇
  2018年   1696篇
  2017年   1992篇
  2016年   2203篇
  2015年   1856篇
  2014年   2117篇
  2013年   10562篇
  2012年   1636篇
  2011年   1742篇
  2010年   1844篇
  2009年   2116篇
  2008年   1831篇
  2007年   1814篇
  2006年   1956篇
  2005年   1853篇
  2004年   1723篇
  2003年   1497篇
  2002年   1546篇
  2001年   1529篇
  2000年   1345篇
  1999年   1198篇
  1998年   1103篇
  1997年   989篇
  1996年   961篇
  1995年   915篇
  1994年   928篇
  1993年   945篇
  1992年   956篇
  1991年   1015篇
  1990年   942篇
  1989年   984篇
  1988年   995篇
  1987年   997篇
  1986年   973篇
  1985年   1038篇
  1984年   939篇
  1983年   983篇
  1982年   880篇
  1981年   853篇
  1980年   658篇
  1979年   679篇
  1978年   588篇
  1977年   537篇
  1976年   488篇
  1975年   402篇
  1974年   416篇
  1973年   430篇
  1972年   363篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
931.
932.
In Hannover/Germany in 1976 a so called "Society for Regenerative Hyperbaric Therapy" (Gesellschaft für Regenerative Uberdruck-Therapie) subjected 20 patients within two coupled multi-place chambers to a simulated hyperbaric environment, equivalent to a maximum of 4 ata, followed usually by gradual reductions of the pressure. The patients were of an average age of 67.2 years and were afflicted by various disorders. During one of the "dives" a patient developed air embolism of the central nervous system. During ensuing confusion of the chamber was opened suddenly, with resultant explosive reduction of the high pressure. This resulted in five letal accidents of decompression sickness. Post mortem examination revealed diffuse distribution of gas bubbles throughout the entire body. By elecronmicroscopy each bubble was covered by an osmiophilic coat. Post mortem findings are discussed and correlated with well-known and new clinical symptomes. These observations present for the first time fatal accidents of decompression sickness in humans, associated with hyperbaric air-therapy.  相似文献   
933.
The authors compared the effects of alcoholic drinks rich in fusel oil with the effects of diluted pure alcohol of the same quantity on 19 clinically healthy university students. The investigations utilized EEG and physiopsychic testing methods. The clinical symptoms were observed both under the effect of drinks and in a crapulous state ("hang-over"). It was found that alcoholic drinks rich in fusel oil can produce a more deviating EEG curve, an increased worsening of physiopsychic performance and of clinical and subjective symptoms. The necessity of regular quality control of alcoholic beverages is pointed out.  相似文献   
934.
Abstract. The efforts to functionally bilingualize the federal public service over the past decade have generally attracted more jeers than cheers. In this rather personal article the author attempts to describe and defend his own role and that of the Public Service Commission in a major attempt at adult re-education.  相似文献   
935.
Abstract. Does management by objectives stifle organizational innovation in the public sector? The authors explore this possibility by describing five common characteristics of mbo and then contrasting them with four characteristics of innovative organizations. The comparison suggests that mbo -pressures lead to organizational stress that is often resolved by the creation of two working environments; one for the pursuit of innovative objectives, and one for the pursuit of regular objectives. This could lead to dysfunctionalism in the form of abandoned objectives-objectives that might have been achieved if mbo were not used. The authors conclude with four implications for public-sector managers: (1) the practice of including innovation objectives along with traditional objectives in the same set of objectives is questionable; (2) broader objectives, perhaps pointing in the general direction of the innovations sought, might be more productive in some cases than specific objectives; (3) possible incompatibility between mbo and innovation might be lessened if innovative ventures are pursued in ad hoc organizational structures; and (4) management by objectives and innovation are not necessarily compatible.  相似文献   
936.
937.
938.
939.
Diversity in communications is most appropriately understood as a free flow of ideas. In order to implement diversity, a comprehensive model of the communication process must be used for policy research, so that the various participants in the process can be properly restrained from abridging the free flow of ideas. The setting of priorities for implementing diversity has been illustrated using available studies of broadcast and cable television.  相似文献   
940.
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