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   24090篇
  免费   744篇
  国内免费   5篇
各国政治   1223篇
工人农民   1011篇
世界政治   1733篇
外交国际关系   892篇
法律   14723篇
中国共产党   9篇
中国政治   294篇
政治理论   4701篇
综合类   253篇
  2020年   320篇
  2019年   392篇
  2018年   492篇
  2017年   588篇
  2016年   590篇
  2015年   451篇
  2014年   477篇
  2013年   2489篇
  2012年   648篇
  2011年   756篇
  2010年   585篇
  2009年   607篇
  2008年   688篇
  2007年   722篇
  2006年   695篇
  2005年   633篇
  2004年   627篇
  2003年   690篇
  2002年   563篇
  2001年   936篇
  2000年   808篇
  1999年   709篇
  1998年   379篇
  1997年   257篇
  1996年   297篇
  1995年   260篇
  1994年   295篇
  1993年   286篇
  1992年   453篇
  1991年   480篇
  1990年   460篇
  1989年   393篇
  1988年   453篇
  1987年   403篇
  1986年   446篇
  1985年   409篇
  1984年   360篇
  1983年   348篇
  1982年   250篇
  1981年   248篇
  1980年   198篇
  1979年   252篇
  1978年   191篇
  1977年   168篇
  1976年   157篇
  1975年   171篇
  1974年   175篇
  1973年   144篇
  1972年   148篇
  1969年   145篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
241.
242.
243.
244.
The Iran-Contra affair is an example of the type of event that is expected to give rise to a rally of public opinion behind the president. However, the public's response to this event, uncharacteristically, was a sharp decrease in support for President Reagan. This case study constitutes an attempt to explore the sources of the public opinion response to foreign policy events. Statements of political elites, news coverage and commentary, and public opinion assessments are examined to test the patriotism, priming, and opinion leadership explanations of the rally phenomenon. The actions of opinion leaders appears to provide the best explanation of the differential public response to the Iran-Contra affair.  相似文献   
245.
A study of 82 suicides during 1982-1986 that were committed by jumping from buildings was performed using the case files of the Office of the Medical Examiner of Metropolitan Dade County in Miami, Florida, U.S.A. The analysis involved the age, race, and sex of the victim along with the results of toxicologic studies and the cause of death. Additionally, the decedent's place of residence, location of the suicide, height of the building, and the reason for the suicide were investigated. Whether or not a note was left by the decedent was also ascertained. The suicidal "jumper" most commonly was a white man who was greater than 60 years of age who died from the resultant multiple injuries. The victim commonly was sober and drug free at the time of the incident. In approximately two-thirds of the cases, the location of the suicide was the victim's residence, which frequently was an apartment or condominium-type dwelling that was seven floors or higher from the ground. The victim often had experienced depression prior to the incident and did not usually leave a suicide note. This article compares the Dade County cases with others that have been studied and discusses the reasons why jumping from a building may have been chosen as the suicidal mechanism.  相似文献   
246.
During preliminary examination of the body of a homicide victim, a peculiar red "fiber" was noticed and recovered. Initially believing this to be a carpet fiber, the item was subjected to fiber analysis. It was found to be a short coiled particle not like any known natural or synthetic fabric fiber. Subsequent examinations determined this "fiber" to be the larva of a common freshwater midge (Diptera; Chironomidae). Chironomid larvae have been observed on other bodies recovered from freshwater environments. Entomological studies of this organism have led to the conclusion that the presence of chironomid larvae indicates submersion of the body.  相似文献   
247.
248.
Programme based on mathematical model of the process of dead body temperature changing was developed for estimation of postmortem interval. Automatic retrieval of problem solution was performed on programmable microcalculators of "Electronica MK-61" type using adaptive approach. Diagnostical accuracy in case of dead body being preserved in permanent cooling conditions is +/- 3%.  相似文献   
249.
250.
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