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   12951篇
  免费   314篇
各国政治   735篇
工人农民   516篇
世界政治   954篇
外交国际关系   480篇
法律   7822篇
中国政治   100篇
政治理论   2593篇
综合类   65篇
  2020年   136篇
  2019年   190篇
  2018年   247篇
  2017年   257篇
  2016年   258篇
  2015年   173篇
  2014年   263篇
  2013年   1354篇
  2012年   305篇
  2011年   320篇
  2010年   291篇
  2009年   310篇
  2008年   357篇
  2007年   350篇
  2006年   338篇
  2005年   295篇
  2004年   303篇
  2003年   287篇
  2002年   226篇
  2001年   547篇
  2000年   475篇
  1999年   399篇
  1998年   179篇
  1997年   162篇
  1996年   132篇
  1995年   132篇
  1994年   133篇
  1993年   115篇
  1992年   240篇
  1991年   289篇
  1990年   272篇
  1989年   262篇
  1988年   253篇
  1987年   293篇
  1986年   256篇
  1985年   236篇
  1984年   230篇
  1983年   206篇
  1982年   144篇
  1981年   161篇
  1980年   112篇
  1979年   205篇
  1978年   135篇
  1977年   104篇
  1976年   87篇
  1975年   122篇
  1974年   129篇
  1973年   136篇
  1972年   98篇
  1971年   95篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
We develop a model of the peace dividend and use it to predict the fiscal consequences of a reduction in the demand for military spending. The model is based on the assumption that the political process responds to political demands and costs in a way that maximizes net political benefits. The predictions of our model on how a peace dividend will be allocated over nonmilitary spending, tax relief, and deficit reduction is tested against the experience of eight major wars in United States history.  相似文献   
73.
A method ist described to determine the CO-content in the tissue of muscles. The prepared tissue is pulverized in a swinging mill at the temperature of liquid nitrogen. Parts of the powder are weighed into headspace vessels. Carbon monoxide ist ejected by a formerly described method and measured gaschromatographically. The Fe-content is determined after an acid disintegration by AAS. Acute intoxications lead to higher CO-contents in heart than in periphere muscles. Chronic exposure to carbon monoxide does not produce these differences.  相似文献   
74.
Recent failures of government information systems to achieve their objectives have highlighted the risk involved in large-scale information technology projects. This article looks at one example, the computerization of the UK social security system, in the light of recent discussions of large-scale technologies and the particular problem of inflexible technologies as defined by Collingridge. It is argued that large-scale government computing projects can fit the criteria of inflexible technologies, although this is not an inherent feature of information technology. There are always more flexible alternatives available: this is illustrated using examples from both private and public organizations.  相似文献   
75.
A 22-year-old Korean soldier, who had received blows to the neck and epigastrium from an officer 10 h earlier, suddenly died after massive hematemesis. He had been in relatively good health except for episodes of blood-tinged vomiting approximately 5 and 7 months prior to this event. Postmortem examination revealed angiodysplasia involving the gastroesophageal junction, and the stomach was distended with blood. No abnormal findings were present around the whole viscera, and the duodenum was free of blood. The pathologic significance of upper gastrointestinal angiodysplasia as a potential source of bleeding and a chronologic correlation between the trauma and bleeding are discussed.  相似文献   
76.
77.
Presented in this paper are the initial results involving the use of the nose or outer ear as temperature measurement sites to determine the postmortem period of the human corpse. Simple mathematical models for both sites are developed based on cooling curves of five corpses. Analysis of errors between actual and calculated postmortem intervals suggest that in its present form, the described methods would not be suitable for use in accurately determining the time since death of human corpses.  相似文献   
78.
79.
80.
Observations of high velocity bloodspatter on adjacent objects   总被引:1,自引:0,他引:1  
In a recent homicide investigation, high velocity backspatter was observed on the sleeve cuff of the accused. These minute droplets were discovered only after microscopic examination and were limited in number. A study was initiated to determine if these were truly backspatter droplets or transferred blood produced from light contact with a bloody item. It was observed that the backspattered blood was primarily limited to contact or near contact shots. An exception was a shot into an already bloody surface. It was found that backspattered blood would deposit on the shooter's shirt sleeve irrespective of the weave pattern. Transferred blood was observed only on the fiber tops. This information was found to be useful in reconstruction of events in suicides as well as possible homicides.  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