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   25617篇
  免费   756篇
各国政治   1049篇
工人农民   979篇
世界政治   2035篇
外交国际关系   849篇
法律   15486篇
中国共产党   2篇
中国政治   134篇
政治理论   5588篇
综合类   251篇
  2020年   291篇
  2019年   380篇
  2018年   480篇
  2017年   579篇
  2016年   596篇
  2015年   430篇
  2014年   492篇
  2013年   2496篇
  2012年   573篇
  2011年   651篇
  2010年   522篇
  2009年   603篇
  2008年   655篇
  2007年   683篇
  2006年   652篇
  2005年   590篇
  2004年   593篇
  2003年   617篇
  2002年   579篇
  2001年   995篇
  2000年   886篇
  1999年   727篇
  1998年   422篇
  1997年   347篇
  1996年   321篇
  1995年   318篇
  1994年   349篇
  1993年   324篇
  1992年   510篇
  1991年   558篇
  1990年   515篇
  1989年   534篇
  1988年   500篇
  1987年   508篇
  1986年   551篇
  1985年   532篇
  1984年   470篇
  1983年   491篇
  1982年   370篇
  1981年   332篇
  1980年   276篇
  1979年   365篇
  1978年   222篇
  1977年   230篇
  1976年   206篇
  1975年   180篇
  1974年   206篇
  1973年   191篇
  1972年   169篇
  1971年   154篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
An improved method has been developed for the reliable classification of different C1R genetic variant forms from human serum or plasma. The method combines the use of neuraminidase-digested samples followed by monodimensional isoelectric focusing in the pH range 5 to 8 followed by immunoblotting. The method yields a simple pattern, with one major band in homozygote and two major bands in heterozygote cases.  相似文献   
122.
The impact of research information depends on its ability to change beliefs or policy assumptions within the relevant audiences. As a hybrid of American and British systems, Canada's chosen decision-making structure for policy-making and its legislative framework for health insurance make these audiences unclear and not readily accessible. This factor and historical characteristics of the research community which made them only partially responsive to the values of decisionmakers provide an explanation for the limited past use of research information in Canadian health policy. More recently, improved responsiveness by researchers and an emerging definition of the audiences by legislative policymakers are bringing about a gradual increase in the potential impact of research at the levels of administrative and clinical policy. Because of continuing decision-making constraints on legislative policy, however, impact at this level is predicted to remain diffuse, with only cautious acceptance of the changes in beliefs implied by research.  相似文献   
123.
124.
125.
Fabella  R. V. 《Public Choice》1996,89(3-4):325-337
Public Choice - We consider an economy where the rent value depends indirectly on value-adding investment of agents (thus indirectly endogenous) and the win-probability is a function of rent...  相似文献   
126.
China's experiments with democracy in this century were few in number, short in duration, and limited in their democratic characteristics. Democratic institutions malfunctioned in numerous ways. Nine sets of causes for the failure of Chinese democracy can be suggested: ideology, internal and external war, military intervention, Chinese political culture, underdevelopment, a peasant mass, flaws in the design of Chinese constitutions, moral failures by democratic politicians, or the lack of transactional benefits for military‐based elites in the process of democratic transition. Each of these factors is reviewed critically with an eye to its possible lessons.  相似文献   
127.
128.
129.
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   
130.
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   
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