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   6226篇
  免费   224篇
各国政治   436篇
工人农民   185篇
世界政治   634篇
外交国际关系   448篇
法律   2589篇
中国政治   52篇
政治理论   2033篇
综合类   73篇
  2023年   44篇
  2022年   29篇
  2021年   55篇
  2020年   106篇
  2019年   152篇
  2018年   169篇
  2017年   196篇
  2016年   203篇
  2015年   117篇
  2014年   174篇
  2013年   1039篇
  2012年   172篇
  2011年   176篇
  2010年   176篇
  2009年   185篇
  2008年   161篇
  2007年   224篇
  2006年   192篇
  2005年   229篇
  2004年   233篇
  2003年   215篇
  2002年   228篇
  2001年   121篇
  2000年   121篇
  1999年   100篇
  1998年   92篇
  1997年   93篇
  1996年   92篇
  1995年   94篇
  1994年   96篇
  1993年   79篇
  1992年   88篇
  1991年   91篇
  1990年   62篇
  1989年   67篇
  1988年   68篇
  1987年   64篇
  1986年   70篇
  1985年   63篇
  1984年   54篇
  1983年   63篇
  1982年   48篇
  1981年   55篇
  1980年   39篇
  1979年   38篇
  1978年   33篇
  1977年   33篇
  1976年   30篇
  1973年   15篇
  1967年   15篇
排序方式: 共有6450条查询结果,搜索用时 15 毫秒
821.
822.
Each natural or man-made disaster presents a different set of circumstances and, as a consequence, each event results in new challenges for response teams. The very large number of deceased victims in recent tragic events is certainly one of the enormous challenges that can tax many different resources for identification specialists. But there are other significant challenges. And during the response, some of these seem insurmountable. They can be solved if we embrace technologies outside the customary disciplines. The Canadian identification effort following the December 2004 tsunami involved responders from several disciplines. Each discipline faced challenges in many different and special areas that were difficult and in some cases previously unseen. This paper presents examples of the ways the Canadian identification team used Internet technology to solve problems that were encountered when it became necessary to duplicate victims' dental, medical and personal records, and transport these records halfway around the world. Digital images of the records were saved at high resolution in multi-page PDF files. These images were made available to on-site personnel using an encrypted, password-secured website.  相似文献   
823.
824.
This study uses data from 641 state prison parolees in California to examine the associations between methamphetamine use and three measures of criminal behavior: (a) self-reported violent criminal behavior, (b) return to prison for a violent offense, and (c) return to prison for any reason during the first 12 months of parole. Methamphetamine use was significantly predictive of self-reported violent criminal behavior and general recidivism (i.e., a return to custody for any reason). However, methamphetamine use was not significantly predictive of being returned to custody for a violent offense. These trends remained even after controlling for involvement in the drug trade (i.e., sales, distribution, or manufacturing).  相似文献   
825.
826.
Moral or ethical codes of practice represent one of the oldest forms of medical regulation. Legislation such as the Medical Practice Act 1992 (NSW) enables regulatory bodies to create codes of practice for medical practitioners. Such codes can become an important aspect of disciplinary proceedings by providing the yardstick against which practitioners' conduct is evaluated. An important aspect of the New South Wales Board's Code of Professional Conduct 2005 is the obligation for doctors to report adverse events which reflect on the performance or conduct of colleagues. This is part of an increasing impetus to report adverse events in the interest of public safety. In the long- term this is a constructive development as it is likely to lead to improvements in identification of risks and hazards and thereby to result in better service provision and community health.  相似文献   
827.
828.
829.
830.
David M. Konisky Department of Political Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Room E53-386, Cambridge, MA 02139 e-mail: sda{at}mit.edu e-mail: konisky{at}mit.edu (corresponding author) Studies of voter turnout across states find that those withmore facilitative registration laws have higher turnout rates.Eliminating registration barriers altogether is estimated toraise voter participation rates by up to 10%. This article presentspanel estimates of the effects of introducing registration thatexploits changes in registration laws and turnout within states.New York and Ohio imposed registration requirements on all oftheir counties in 1965 and 1977, respectively. We find thatthe introduction of registration to counties that did not previouslyrequire registration decreased participation over the long termby three to five percentage points. Though significant, thisis lower than estimates of the effects of registration fromcross-sectional studies and suggests that expectations aboutthe effects of registration reforms on turnout may be overstated.  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