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   16065篇
  免费   536篇
各国政治   621篇
工人农民   733篇
世界政治   1042篇
外交国际关系   534篇
法律   9987篇
中国共产党   35篇
中国政治   195篇
政治理论   3286篇
综合类   168篇
  2021年   90篇
  2020年   241篇
  2019年   246篇
  2018年   347篇
  2017年   395篇
  2016年   445篇
  2015年   357篇
  2014年   349篇
  2013年   1550篇
  2012年   414篇
  2011年   438篇
  2010年   352篇
  2009年   422篇
  2008年   506篇
  2007年   520篇
  2006年   483篇
  2005年   467篇
  2004年   442篇
  2003年   384篇
  2002年   381篇
  2001年   544篇
  2000年   503篇
  1999年   402篇
  1998年   237篇
  1997年   181篇
  1996年   194篇
  1995年   193篇
  1994年   197篇
  1993年   185篇
  1992年   305篇
  1991年   339篇
  1990年   322篇
  1989年   288篇
  1988年   309篇
  1987年   288篇
  1986年   333篇
  1985年   306篇
  1984年   246篇
  1983年   247篇
  1982年   156篇
  1981年   180篇
  1980年   146篇
  1979年   151篇
  1978年   149篇
  1977年   110篇
  1976年   100篇
  1975年   110篇
  1974年   128篇
  1973年   132篇
  1972年   89篇
排序方式: 共有10000条查询结果,搜索用时 22 毫秒
151.
152.
Book Review     
Radical myths and superpower relations in the 1980s

A review of Mark Kaldor, Gerard Holden, and Richard Falk (eds), The New Detente: Rethinking East‐West Relations, Verso, London, 1989.

Paul Taylor and A.J.R. Groom, Global Issues in the United Nations Framework, Basingstoke, Hampshire, The MacMillan Press Ltd., 1989.

Roger A. Coate, Unilateralism, Ideology, and US Foreign Policy: The United States in and out of UNESCO, Lynne Reinner Publishers, London, 1988.

Bary Buzan, Morten Kelstnip, Pierre Lemaitre, Elzbieta Tromer, and Ole Weaver, The European Security Order Recast: Scenarios for the Post‐Cold War Era, Pinter Publishers, London & New York, 1990, pp.x. 282, £8.95 pbk, £30 hbk.  相似文献   

153.
154.
A definitive explanation of "crib" or "cot" death remains unknown. An unusual incidental autopsy finding of agenesis of the corpus callosum in a case presenting as "near miss" sudden infant death syndrome (SIDS) is discussed. Hitherto, only a single case associated with SIDS has been reported in the literature. The condition may be easily missed outside the interest in neuropathology.  相似文献   
155.
156.
157.
We report seven fatalities resulting from the ingestion of illicit drugs packaged in condoms, rubber balloons, or plastic bags which were observed in the last 4 years at the Office of the Chief Medical Examiner, State of Maryland. All the victims, with the exception of one, were men ranging in age from 19 to 37 years. There was no racial predominance. No drug paraphernalia was found at any scene. In two cases, seizure-like activity was documented. One victim had recently returned from Nigeria; therefore, Lassa fever was initially suspected. Two of the victims were "body packer" contrabanders who had just arrived from Africa. They used body cavities to hide large amounts of heroin to avoid U.S. Customs. The other five cases were "mini-packers," small-time illicit drug dealers who had swallowed a single bag of cocaine to avoid police detection. The possible mechanism of leaking or rupture of the latex container is discussed.  相似文献   
158.
Analysis of a sample of 1108 radii corresponding to 567 black and white North Americans in the Terry Collection at the Smithsonian Institution demonstrates that the diameter of the radial head is an accurate sex discriminator for human remains. A simple "radial-head method" of sex determination consists of measuring the maximum and minimum diameters of the head and comparing such measurements with the test cutoff points. The subject is female when the maximum radial head diameter (either left or right) is less than or equal to 21 mm, and male when the maximum diameter (either left or right) is greater than or equal to 24 mm. The same decisions apply to the minimum diameters of 20 mm or less and 23 mm or more, respectively. When the maximum diameter is 23 mm or the minimum is 22 mm, the subject is more likely male; when the maximum diameter is 22 mm or the minimum is 21 mm, the subject is more likely female. The sample frequency of any one of these latter diameters is never more than 16%. Cross-validation of the method with a sample of 50 pairs of radii of the Terry Collection, different from the original specimens, resulted in 92% sexing accuracy when using the left radius singly, 94% accuracy when using the right radius singly, and 96% accuracy when using both radii jointly.  相似文献   
159.
Isoenzyme band patterns of animal blood erythrocyte acid phosphatase (EAP) and phosphoglucomutase-1 (PGM) were studied by isoelectric focusing on ultrathin polyacrylamide gels. For blood from all animals tested (dog, cat, cow, sheep, and goat), the overall band patterns for both isoenzymes were different from those of the most common human types of these enzymes, although some animal EAP and PGM bands appeared in the human band areas. When mixtures of human and animal red blood cells were studied, it was found that misinterpretation of human types was possible only if the overall band pattern of the mixtures was ignored. For the animal blood tested, the strong PGM bands appearing outside the human band areas could be used as "markers" for the possible presence of animal blood in the samples tested.  相似文献   
160.
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   
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