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   3106篇
  免费   116篇
各国政治   241篇
工人农民   114篇
世界政治   317篇
外交国际关系   202篇
法律   1215篇
中国政治   15篇
政治理论   1039篇
综合类   79篇
  2023年   10篇
  2022年   14篇
  2021年   26篇
  2020年   54篇
  2019年   66篇
  2018年   111篇
  2017年   92篇
  2016年   112篇
  2015年   68篇
  2014年   86篇
  2013年   473篇
  2012年   97篇
  2011年   104篇
  2010年   75篇
  2009年   89篇
  2008年   101篇
  2007年   122篇
  2006年   84篇
  2005年   112篇
  2004年   103篇
  2003年   82篇
  2002年   87篇
  2001年   78篇
  2000年   78篇
  1999年   62篇
  1998年   54篇
  1997年   56篇
  1996年   53篇
  1995年   45篇
  1994年   42篇
  1993年   36篇
  1992年   44篇
  1991年   48篇
  1990年   48篇
  1989年   42篇
  1988年   34篇
  1987年   22篇
  1986年   25篇
  1985年   27篇
  1984年   25篇
  1983年   23篇
  1982年   30篇
  1981年   38篇
  1980年   28篇
  1979年   14篇
  1978年   14篇
  1977年   11篇
  1975年   12篇
  1974年   12篇
  1967年   7篇
排序方式: 共有3222条查询结果,搜索用时 15 毫秒
211.
Much energy has been devoted to the evaluation of employment and training programs. Both of these evaluations have often been disappointing both to supporters of the programs and the evaluators themselves. At least in part, the reason for this is that many of the evaluations that have been done have not been carried out very effectively. Guidelines which policymakers should keep in mind in the course of initiating evaluations of employment and training programs are presented. Useful insights in this regard can be obtained by examining evaluation activity in other areas of social policy such as education.  相似文献   
212.
213.
214.
In recent years there has been much complaint from originatingpharmaceutical companies that the test of obviousness appliedin the UK, as evidenced by decisions of the Patent Court onpharmaceutical related patents, is set unfairly low. This isof particular impact where ‘formulation’ type patentsare concerned. That is, typically, those patents that claiman existing active ingredient mixed, formulated, or combinedwith other known components or in a different way. Pharmaceuticalcompanies complain that the vulnerability of such patents againstinvalidity proceedings in the UK fails to protect the considerableinvestment made in the development of these formulations againstgeneric competition. This article looks at whether the reasons for this concern canbe traced to particular sub-tests that have been used by thecourts to try to answer the statutory test for obviousness.In particular, the sub-tests of ‘lying in the road’and ‘obvious to try’ are examined and the questionof whether there has been an imbalance between these two sub-testsis explored. Further, it is argued that the decisions in therecent cases of Saint-Gobain and Angiotech suggest that therehas been a shift in how the Court of Appeal assesses obviousness.This is away from the ‘obvious to try with a reasonableexpectation of success’ standard to one of ‘obviousto try if success is self-evident’. If the Court of Appeal follows the line taken in these two casesthen pharmaceutical patents of the formulations kind shoulda face better prospect of surviving invalidity challenges basedon obviousness in future.  相似文献   
215.
The Nature of Managerial Work, 2nd edition. By Henry Mintzberg . Engle‐wood Cliffs, N.J.: Prentice‐Hall.  相似文献   
216.
217.
No consensus yet exists on how to handle incidental findings (IFs) in human subjects research. Yet empirical studies document IFs in a wide range of research studies, where IFs are findings beyond the aims of the study that are of potential health or reproductive importance to the individual research participant. This paper reports recommendations of a two-year project group funded by NIH to study how to manage IFs in genetic and genomic research, as well as imaging research. We conclude that researchers have an obligation to address the possibility of discovering IFs in their protocol and communications with the IRB, and in their consent forms and communications with research participants. Researchers should establish a pathway for handling IFs and communicate that to the IRB and research participants. We recommend a pathway and categorize IFs into those that must be disclosed to research participants, those that may be disclosed, and those that should not be disclosed.  相似文献   
218.
This paper examines race-based peremptory challenges. Such challenges occur during the voir dire jury selection process. The process allows both the defense and the prosecution to strike jurors who they believe will not decide cases fairly. However, in the case of Batson v. Kentucky 476 U.S. 79 (1986), the Supreme Court ruled that race could not be used as a factor in eliminating prospective jurors. This paper examines federal litigation for five years in which it was alleged that race was used as a factor in removing a juror. An examination of the cases revealed that most of the cases involved sole male litigants who allege that there were multiple race-based peremptory challenges used in their cases. Moreover, most of the cases that led to the allegations involved violent offenses. Other case characteristics are noted, but of most significance was the finding that most appellants lost their cases. As such, the courts felt that most of the challenges were, in fact, race neutral. The implications of this research are discussed. This study was funded by an undergraduate research grant from Penn State University.  相似文献   
219.
220.
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