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   25215篇
  免费   515篇
各国政治   913篇
工人农民   1604篇
世界政治   1638篇
外交国际关系   889篇
法律   14786篇
中国共产党   2篇
中国政治   76篇
政治理论   5624篇
综合类   198篇
  2020年   221篇
  2019年   252篇
  2018年   1531篇
  2017年   1515篇
  2016年   1380篇
  2015年   348篇
  2014年   349篇
  2013年   1747篇
  2012年   587篇
  2011年   1287篇
  2010年   1287篇
  2009年   927篇
  2008年   1144篇
  2007年   1119篇
  2006年   457篇
  2005年   459篇
  2004年   569篇
  2003年   565篇
  2002年   416篇
  2001年   686篇
  2000年   628篇
  1999年   514篇
  1998年   310篇
  1997年   260篇
  1996年   229篇
  1995年   237篇
  1994年   271篇
  1993年   229篇
  1992年   343篇
  1991年   373篇
  1990年   333篇
  1989年   358篇
  1988年   329篇
  1987年   345篇
  1986年   344篇
  1985年   341篇
  1984年   306篇
  1983年   334篇
  1982年   270篇
  1981年   243篇
  1980年   187篇
  1979年   252篇
  1978年   174篇
  1977年   157篇
  1976年   134篇
  1975年   126篇
  1974年   138篇
  1973年   123篇
  1972年   117篇
  1971年   97篇
排序方式: 共有10000条查询结果,搜索用时 531 毫秒
151.
152.
153.
154.
155.
Ethanol was determined by gas chromatography in a variety of tissues and body fluids secured at autopsy in 61 cases. The specimens tested included right and left heart blood, femoral blood, pericardial fluid, cerebrospinal fluid, vitreous humor, urine, stomach contents, and brain. Statistical analysis of the cases revealed no significant differences among the various blood sites tested. However, the variations in blood ethanol concentrations among the various sampling sites within each case were as follows: 40 cases showed differences of less than 25%; 16 cases revealed variability between 25% and 50%, 4 cases had differences exceeding 50%. In one case, satisfactory blood analyses could not be accomplished. The larger variances occurred especially in those instances in which stomach alcohol concentration was 0.50% or greater. In one case, the variability amongst the different blood sites exceeded 400% (femoral blood--0.043%, right atrium--0.070%, root of aorta--0.156%); the brain was 0.050%, and the stomach contents was 1.2%. For all 61 cases, variances in blood alcohol content among the different sampling sites in a single cadaver ranged from 1.8 to 428%.  相似文献   
156.
Using an interrupted time-series design, this research note analyzes the long-term effect of Minnesota's sentencing guidelines on reducing unwarranted disparity in sentencing outcomes that fall within their scope of authority. Unwarranted disparity is defined as residual variation not attributable to legally mandated sentencing factors. Findings suggest that although the sentencing guidelines initially reduced disparity for the no prison/prison sentencing decision, inequality began to revert to preguideline levels as time passed. Further analysis revealed that the guidelines had a permanent impact on reducing disparities in decisions on the length of prison sentence. Overall we observed an 18% decline in disparity for the no prison/prison outcome and a 60% reduction in inequality for the judicial decision as to length of prison sentence. Two explanations for the reversionary trend in the no prison/prison series are highlighted.  相似文献   
157.
158.
159.
The authors examine the characteristics of threatening and otherwise inappropriate communications sent to members of the U.S. Congress by a sample of 86 subjects, 20 of whom threatened assassination. We quote excerpts from these letters and provide quantitative data on such variables as the volume, duration, form, and appearance of such communications; the enclosures; the subjects' perceived relationships to the recipients; the thematic content of the communications; and the messages and threats communicated. Comparisons between 43 subjects who pursued encounters with members of Congress and 43 who did not revealed 17 factors associated with such pursuit. In this population, threateners were significantly less likely to pursue an encounter than inappropriate letter writers who did not threaten, regardless of the type of threat or the harm threatened. Inappropriate letters to members of Congress are compared with those directed to Hollywood celebrities. Mentally disordered persons writing to public figures often mention and sometimes threaten public figures other than those to whom the letters are addressed, which raises important issues regarding notification of endangered third parties and the sharing of information among protective agencies.  相似文献   
160.
With the rapid growth of cross-border competition among currencies, informed observers predict that the new monetary unions are virtually inevitable in many parts of the world. In fact, predictions of such alliances are misleading and almost certainly wrong. Monetary unions necessarily imply a measure of collective action in the issue and management of money. An alliance requires allies—other states with similar preferences and a disposition to act cooperatively. A survey of proposed monetary unions shows that willing partners among sovereign states are just not all that plentiful. Conceivably some governments could be attracted to less demanding forms of monetary alliance, depending on bargaining context. But prospects for many full new monetary unions are dim at best.  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