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   11507篇
  免费   312篇
各国政治   467篇
工人农民   419篇
世界政治   784篇
外交国际关系   332篇
法律   7021篇
中国政治   72篇
政治理论   2588篇
综合类   136篇
  2020年   117篇
  2019年   177篇
  2018年   205篇
  2017年   250篇
  2016年   231篇
  2015年   179篇
  2014年   203篇
  2013年   1045篇
  2012年   236篇
  2011年   287篇
  2010年   235篇
  2009年   297篇
  2008年   286篇
  2007年   296篇
  2006年   295篇
  2005年   268篇
  2004年   268篇
  2003年   274篇
  2002年   266篇
  2001年   456篇
  2000年   384篇
  1999年   305篇
  1998年   174篇
  1997年   136篇
  1996年   149篇
  1995年   149篇
  1994年   152篇
  1993年   151篇
  1992年   246篇
  1991年   268篇
  1990年   254篇
  1989年   259篇
  1988年   235篇
  1987年   239篇
  1986年   280篇
  1985年   263篇
  1984年   244篇
  1983年   225篇
  1982年   170篇
  1981年   136篇
  1980年   129篇
  1979年   158篇
  1978年   102篇
  1977年   119篇
  1976年   101篇
  1975年   75篇
  1974年   98篇
  1973年   92篇
  1972年   79篇
  1971年   70篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
951.
952.
953.
954.
Human cannibal cases are relatively rare in modern civilized societies. We report a single case of familial cannibalism that occurred in Oklahoma in 1977. The investigation posed unique problems in pathology, psychiatry, criminalistics, and serology.  相似文献   
955.
956.
Lyophilized Sigma Type III trypsin has been applied to latent prints two weeks to two months old. This trypsin preparation eliminates the background problems that had been encountered with old prints in a previous study. Zinc chloride treatment of latent prints previously exposed to ninhydrin enhances their detectability upon laser examination. However, it has been reported that the zinc chloride reaction occasionally fails to occur. Accordingly, we have investigated the optimization of this reaction. We find that high humidity and elevated temperature, particularly the former, are needed. Cadmium nitrate, although it produces weaker fluorescence than zinc chloride, may at times be useful. Reaction conditions are much the same as those for zinc chloride.  相似文献   
957.
958.
Previous studies have established that repeat victimizations occur more frequently than would be expected if households within a particular area were victimized randomly. This implies that characteristics of the household affect the victimization rate. Even controlling for these characteristics, we find that a Poisson model does not capture the distribution of victimizations because repeat victimizations are more concentrated than it would indicate. This leads us to adopt the negative binomial generalization of the Poisson model. Our analysis uses sociodemographic attributes of the household and community-level characteristics to predict victimizations, with the victimization data being the observed number of property crime victimizations from the 1992 British Crime Survey. The negative binomial generalization is found to be highly statistically significant and the crime concentration it implies becomes much more marked as the predicted number of victimizations increases.  相似文献   
959.
External beam proton-induced X-ray emission (PIXE) analysis has been used to verify the presence of lead in the finger bone of a murder victim. The deceased, who had been buried several years, was known to have suffered a bullet wound to his right hand several years before death. X-ray radiographs of the right second proximal phalanx revealed the possible presence of metal fragments below the surface of the bone. To verify the presence of lead in a nondestructive manner, the bone was scanned with a 1.5-MeV proton beam. PIXE analysis showed that lead was present only in the vicinity of the fragments previously detected in the radiographs. A study of gunshot residue in bone shows that the distribution of lead around the bullet hole is independent of the firing distance for distances greater than 0.6 m.  相似文献   
960.
This study examines public opinion in Costa Rica and El Salvador regarding regional integration in Central America. Recent efforts at regional integration as well as the response of the governments of the above countries to those efforts are reviewed. Public opinion toward regional integration is significantly more positive but less structured in El Salvador than in Costa Rica. Differences in the international and domestic contexts help to explain the differential responses in these two countries. Likewise, contextual factors help to account for differences between Central American and European publics in attitudes toward regional integration. Charles L. Davis is associate professor of political science at the University of Kentucky. His interests are Latin American politics and comparative political behavior. Matthew J. Gabel is assistant professor of political science at the University of Kentucky. His interests are European politics and the politics of regional integration. Kenneth M. Coleman is a former professor at the University of Kentucky, the University of North Carolina-Chapel Hill, and the University of New Mexico. His interests are Latin American politics and public opinion.  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