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   476篇
  免费   20篇
各国政治   43篇
工人农民   43篇
世界政治   40篇
外交国际关系   20篇
法律   211篇
中国政治   3篇
政治理论   131篇
综合类   5篇
  2023年   4篇
  2020年   3篇
  2019年   14篇
  2018年   13篇
  2017年   10篇
  2016年   14篇
  2015年   15篇
  2014年   16篇
  2013年   67篇
  2012年   13篇
  2011年   15篇
  2010年   11篇
  2009年   18篇
  2008年   18篇
  2007年   13篇
  2006年   13篇
  2005年   20篇
  2004年   20篇
  2003年   9篇
  2002年   10篇
  2001年   13篇
  2000年   11篇
  1999年   11篇
  1998年   7篇
  1997年   8篇
  1996年   10篇
  1995年   4篇
  1994年   8篇
  1993年   10篇
  1992年   6篇
  1991年   8篇
  1990年   9篇
  1989年   7篇
  1988年   10篇
  1987年   3篇
  1986年   5篇
  1985年   7篇
  1984年   6篇
  1983年   2篇
  1979年   3篇
  1978年   3篇
  1977年   4篇
  1976年   3篇
  1974年   3篇
  1973年   3篇
  1972年   2篇
  1971年   2篇
  1965年   1篇
  1964年   3篇
  1963年   1篇
排序方式: 共有496条查询结果,搜索用时 15 毫秒
351.
352.
353.
An intellectual property negotiator shares his perceptions about important considerations for setting royalty rates based on an analysis of 95 licenses and his personal experiences.  相似文献   
354.
355.
Narrow visions     
Russell Kirk 《Society》1978,15(3):52-54
  相似文献   
356.
357.
358.
We present a study of 102 Sudden Infant Death Syndrome (SIDS) deaths using a retrospective review of medical examiner autopsy reports. The prevalence of sleep related risk factors with regards to sleep surface, sleep position, and co-sleeping were determined in a population of infants less than 1-year-old. Of the 102 SIDS deaths, 67 (65.7%) were not in a crib, 63 (61.8%) were prone, and 48 (47.1%) were co-sleeping. However, 94 (92.2%) of these deaths had at least one risk factor present. Only 8 (7.8%) infants had slept alone, in a crib or bassinet, and on their back or side. Infants less than 4-months-old had a higher rate of co-sleeping (54.7%) than the older infants (25.9%), and a higher frequency of heart malformations at post-mortem examination. The older infants were more likely to exhibit pulmonary and tracheal inflammation, and neuropathology.  相似文献   
359.
The incidence of amniotic fluid embolism during pregnancy is approximately 1/50,000 and has a mortality rate in excess of 80%. The postmortem diagnosis of amniotic fluid embolism can be challenging for forensic investigators and pathologists. At autopsy, usually signs of disseminated intravascular coagulation suggest an amniotic fluid embolism. A definitive diagnosis of amniotic fluid embolism cannot be made until ancillary studies are performed on the decedent's tissues. We report a case of a 37-year-old G3P2 white female who was 36 weeks gestation when her membranes spontaneously ruptured. She suddenly became breathless, went into cardiogenic shock, and died. The autopsy revealed gross and microscopic findings of amniotic fluid embolism, which was confirmed with ancillary studies consisting of special stains, immunohistochemistry, and a serum tryptase level. The authors hope this case report, including gross and microscopic autopsy findings with procedural and ancillary studies, and review of the literature will help investigators and pathologists in the diagnosis of amniotic fluid embolism.  相似文献   
360.
This article uses data from the British Election Study series since 1974 and qualitative data from interviews with key party personnel to investigate the social and political basis of Liberal support in Britain. There are three main sections to the article: the first deals with the social and demographic profile of the Liberal vote, while the second examines the political characteristics of its supporters. In the final section these findings are used to assess the Liberal Democrats' electoral strategy at the 2001 General Election and beyond. We find that Liberals tend to be drawn from a similar social background to Conservative supporters (particularly in term of class), but politically there has been an increasingly close relationship between the Liberal Democrats and the Labour Party.  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