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   23702篇
  免费   668篇
各国政治   1147篇
工人农民   927篇
世界政治   1898篇
外交国际关系   884篇
法律   14040篇
中国共产党   2篇
中国政治   119篇
政治理论   5134篇
综合类   219篇
  2020年   274篇
  2019年   343篇
  2018年   449篇
  2017年   531篇
  2016年   563篇
  2015年   397篇
  2014年   469篇
  2013年   2494篇
  2012年   549篇
  2011年   576篇
  2010年   499篇
  2009年   521篇
  2008年   613篇
  2007年   635篇
  2006年   622篇
  2005年   539篇
  2004年   549篇
  2003年   580篇
  2002年   507篇
  2001年   895篇
  2000年   804篇
  1999年   684篇
  1998年   381篇
  1997年   319篇
  1996年   279篇
  1995年   275篇
  1994年   318篇
  1993年   295篇
  1992年   438篇
  1991年   497篇
  1990年   450篇
  1989年   468篇
  1988年   444篇
  1987年   478篇
  1986年   462篇
  1985年   450篇
  1984年   403篇
  1983年   418篇
  1982年   331篇
  1981年   318篇
  1980年   235篇
  1979年   355篇
  1978年   237篇
  1977年   201篇
  1976年   185篇
  1975年   193篇
  1974年   208篇
  1973年   192篇
  1972年   156篇
  1971年   141篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
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   
122.
123.
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   
124.
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   
125.
126.
European Journal of Law and Economics - In this article I try to find answers for three questions: Which functions are exercised by the Court of Audit in the Netherlands, and what kinds of...  相似文献   
127.
The primary aim of this paper is to review the literature on preadolescent friendships in order to examine the relationship between preadolescent friendships and social support in adulthood. Social supports are important to health, both directly and as a stress buffer. Few studies, however, have specifically examined adult social supports from the perspective of their developmental precursors and critical developmental periods. Some data indicate that the preadolescent period may be of particular importance to the development of adult social skills and ties. Observational and empirical studies of preadolescent peer relationships, and in particular best friendships, suggest unique and critical contributions to adult social relatedness. Present research is suggestive but is insufficient to validate preadolescence as a critical period in adult social relatedness. Our review has implications for better understanding the mechanisms by which preadolescent friendships effect adult social support—an important mediator of the effects of stress on health. Further longitudinal study is needed.Received Ph.D. from University of Maryland. Research interests are social supports and psychological responses to trauma and disaster.Received M.D. from Yale University. Research interests are social supports and traumatic stress.  相似文献   
128.
129.
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   
130.
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