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   16273篇
  免费   414篇
各国政治   943篇
工人农民   573篇
世界政治   1077篇
外交国际关系   702篇
法律   9616篇
中国共产党   1篇
中国政治   95篇
政治理论   3519篇
综合类   161篇
  2020年   162篇
  2019年   230篇
  2018年   308篇
  2017年   344篇
  2016年   370篇
  2015年   278篇
  2014年   355篇
  2013年   1852篇
  2012年   426篇
  2011年   408篇
  2010年   355篇
  2009年   373篇
  2008年   432篇
  2007年   434篇
  2006年   441篇
  2005年   353篇
  2004年   365篇
  2003年   382篇
  2002年   352篇
  2001年   591篇
  2000年   523篇
  1999年   453篇
  1998年   205篇
  1997年   210篇
  1996年   176篇
  1995年   176篇
  1994年   191篇
  1993年   184篇
  1992年   300篇
  1991年   341篇
  1990年   313篇
  1989年   330篇
  1988年   300篇
  1987年   320篇
  1986年   333篇
  1985年   295篇
  1984年   280篇
  1983年   260篇
  1982年   184篇
  1981年   183篇
  1980年   140篇
  1979年   235篇
  1978年   152篇
  1977年   138篇
  1976年   117篇
  1975年   153篇
  1974年   169篇
  1973年   163篇
  1972年   121篇
  1971年   113篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
23.
A method has been developed on reverse phase high performance liquid chromatography for simultaneous determination of methyl, ethyl and isopropyl alcohols under refractive index detection using pure water as the mobile phase. A good separation has been achieved between these alcohols. Detector response was linear with a detection limit of 5 mg/100 ml. Recovery studies were performed by adding known amounts of methyl and ethyl alcohols to blood, lung and liver within the range 80–90%. The reproducibility of the results was always >90%. The quantitative distribution of methyl alcohol in postmortem body tissues and fluids has been reported in three cases of poisoning.  相似文献   
24.
25.
This review chronicles the characteristics of deliberate and accidental mass poisonings that occurred in World Wars I and II, in Bhopal, and in other historical cases up to and including modern wars. It also considers approaches to the investigation of such cases from the medicolegal as well as general standpoints.  相似文献   
26.
The DNA commission of the International Society of Forensic Genetics (ISFG) was convened at the 21st congress of the International Society for Forensic Genetics held between 13 and 17 September in the Azores, Portugal. The purpose of the group was to agree on guidelines to encourage best practice that can be universally applied to assist with mixture interpretation. In addition the commission was tasked to provide guidance on low copy number (LCN) reporting. Our discussions have highlighted a significant need for continuing education and research into this area. We have attempted to present a consensus from experts but to be practical we do not claim to have conveyed a clear vision in every respect in this difficult subject. For this reason, we propose to allow a period of time for feedback and reflection by the scientific community. Then the DNA commission will meet again to consider further recommendations.  相似文献   
27.
28.
He is author of many works about social class, including The Protestant Establishment Revisitedand Philadelphia Gentlemen,both published by Transaction Publishers.  相似文献   
29.
30.
New York State experimented with replacing their litigation-oriented system for achieving toxic dump site cleanup with one promising to lower transaction costs through alternative dispute resolution. Our analysis of outcomes is informed by three generations of implementation work focusing on (1) the motivations and incentives shaping individual behavior, (2) the larger organizational and political factors associated with variation across cases, and (3) the generic properties of policy implements. This mosaic approach to explanation produces, we believe, a more lifelike picture of use to policy makers for understanding the dynamic and interrelated nature of their choices.  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