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   22089篇
  免费   1441篇
各国政治   910篇
工人农民   821篇
世界政治   1443篇
外交国际关系   631篇
法律   15593篇
中国共产党   4篇
中国政治   153篇
政治理论   3792篇
综合类   183篇
  2020年   442篇
  2019年   474篇
  2018年   599篇
  2017年   663篇
  2016年   696篇
  2015年   562篇
  2014年   568篇
  2013年   2248篇
  2012年   541篇
  2011年   650篇
  2010年   737篇
  2009年   701篇
  2008年   587篇
  2007年   539篇
  2006年   651篇
  2005年   506篇
  2004年   528篇
  2003年   497篇
  2002年   474篇
  2001年   757篇
  2000年   677篇
  1999年   531篇
  1998年   269篇
  1997年   252篇
  1996年   221篇
  1995年   239篇
  1994年   245篇
  1993年   247篇
  1992年   416篇
  1991年   465篇
  1990年   448篇
  1989年   474篇
  1988年   437篇
  1987年   405篇
  1986年   420篇
  1985年   430篇
  1984年   404篇
  1983年   369篇
  1982年   251篇
  1981年   233篇
  1980年   204篇
  1979年   269篇
  1978年   194篇
  1977年   163篇
  1976年   151篇
  1975年   149篇
  1974年   166篇
  1973年   162篇
  1972年   140篇
  1968年   123篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
111.
112.
113.
Proposals to ration health care in the United States meet a number of objections, symbolic and literal. Nonetheless, an acceptance of the idea of rationing is a necessary first step toward universal health insurance. It must be understood that universal health care requires an acceptance of rationing, and that such an acceptance must precede enactment of a program, if it is to be economically sound and politically feasible. Commentators have argued that reform of the health care system should come before any effort to ration. On the contrary, rationing and reform cannot be separated. The former is the key to the latter, just as rationing is the key to universal health insurance.  相似文献   
114.
A simple and rapid method is described for processing organ and water samples for the identification of diatoms so that they can be studied and recorded for taxonomic and diagnostic purposes. Samples are treated with concentrated nitric acid; the fluid obtained is centrifuged, and its sediment is dried, coated, and examined under the scanning electron microscope. The method does not alter the morphology of diatoms and allows the study of freshwater and seawater species present in the organs of bodies found in the water, making possible the diagnosis of drowning under specific conditions.  相似文献   
115.
116.
Book Reviews in This Article:
Getting Rid of Patients: Contradictions in the Socialization of Physicians . By Terry Mizrahi
Physicians and Social Change . By John Colombotos and Corinne Kirchner
Changing Values in Medicine . Edited by Eric J. Cassell and Mark Siegler
Professional Ethics and Primary Care Medicine: Beyond Dilemmas and Decorum . By Harmon L. Smith and Larry R. Churchill
Physician—Patient Decision-Making: A Study in Medical Ethics . By Douglas N. Walton
With Dignity: The Search for Medicare and Medicaid . By Sheri I. David
The Dismissal of Students with Mental Disorders. Legal Issues, Policy Considerations, and Alternative Responses .
Courtroom Toxicology . By Marshall Houts, Randall C. Baselt, and Robert H. Cravey  相似文献   
117.
118.
The present study examines the extent to which neighborhood and social psychological influences predict childhood violence among 867 African‐American youth. The results showed that neighborhood affluence was the only neighborhood‐level variable to exert a significant influence on childhood violence. Furthermore, childhood violence was significantly related to social psychological influences, such as adopting a street code, associating with violent peers, parental use of violence, and quality parenting. Overall, the findings suggested that simply living in a violent neighborhood does not produce violent children, but that family, peer, and individual characteristics play a large role in predicting violence in childhood.  相似文献   
119.
An important problem in the political economy of the UK is that the disparity of unemployment rates across its regions is much more marked than the corresponding dispersion of wage rates. One possibility is that this is due to the attitude of trade unions to their members in different regions. If unions wish to preserve parity between members in different regions then they will value wage equality between regions over and above wage levels. This may then persuade them to overlook inter-regional productivity differences in setting wages. The price that low-efficiency regions will then pay for this desire for wage equality is higher unemployment rates.Much of the research for this paper was carried out while the author was visiting the Trade Union Economics Research Institute (FIEF), Stockholm in 1989. An earlier version of this paper was presented at a seminar there and the author is gratefully to Villy Bergstrom, Paul Chen, Douglas Hibbs, Eva Udden-Jondal and other institute members for several useful comments. Comments from Kevin Lee, John Spencer and an anonymous referee have also substantially improved the paper. The usual disclaimer applies.  相似文献   
120.
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