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   10168篇
  免费   428篇
各国政治   662篇
工人农民   286篇
世界政治   1031篇
外交国际关系   672篇
法律   4362篇
中国政治   68篇
政治理论   3403篇
综合类   112篇
  2023年   57篇
  2021年   76篇
  2020年   148篇
  2019年   207篇
  2018年   264篇
  2017年   305篇
  2016年   345篇
  2015年   206篇
  2014年   252篇
  2013年   1631篇
  2012年   287篇
  2011年   265篇
  2010年   287篇
  2009年   304篇
  2008年   270篇
  2007年   347篇
  2006年   320篇
  2005年   349篇
  2004年   338篇
  2003年   320篇
  2002年   338篇
  2001年   190篇
  2000年   199篇
  1999年   168篇
  1998年   186篇
  1997年   166篇
  1996年   131篇
  1995年   163篇
  1994年   157篇
  1993年   147篇
  1992年   154篇
  1991年   143篇
  1990年   115篇
  1989年   129篇
  1988年   126篇
  1987年   137篇
  1986年   127篇
  1985年   136篇
  1984年   115篇
  1983年   111篇
  1982年   100篇
  1981年   108篇
  1980年   76篇
  1979年   78篇
  1978年   67篇
  1977年   65篇
  1976年   59篇
  1975年   36篇
  1974年   38篇
  1973年   38篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
871.
872.
Abstract: The objective of this article is to analyse public initiatives to stimulate regional innovation in Walloon region in Belgium and in the Province of Quebec. The empirical analysis relies on the competitive poles program in Walloon and on the ACCORD project (Action Concertée de Coopération Régionale de Développement) in Quebec. The comparison will allow discussing the implementation and regional embedding of these programs and will reveal the similarities and the differences between the structure, the organization and the deployment of these strategies in the various regions targeted.  相似文献   
873.
874.
How did the Menzies Governments of the early to mid 1960s arrive at the position of sending Australian troops to Vietnam? During the 1950s, Menzies, and especially his External Affairs Minister Richard Casey, developed an appreciation of the strategic significance of Indochina, but struggled to view the conflict in Vietnam in ways other than through Cold War lenses. By the 1960s too, Britain's capacity to demonstrate a lead for Australia in foreign policy for the region was diminishing with its power, and the Menzies Governments were mindful of the need to support an American preparedness to intervene in Southeast Asia against communist‐led forces. This logic became more compelling in the face of Indonesia's “Confrontation” with Malaysia from 1963. As a result, the Liberals were not reluctant to support US military intervention in the region, in Vietnam.  相似文献   
875.
Private nonprofit organizations play a major role in delivering a range of publicly funded social services. Aggregate data from a recent Urban Institute study reveal that recent federal cutbacks have affected the services, programs and clients of NPOs. An examination of specific agencies in Maricopa County (Phoenix) reveals that many service providers have adopted a business approach to their services and clients, treating them as commodities. In general, agencies serving clients with Resource Mobilization Potential-youth and elderly-have fared better than those dealing primarily with poor adults.  相似文献   
876.
Abstract: A new screening method for detecting gamma-hydroxybutyric acid (GHB) in drink matrices, using the IonSense, Inc. (Saugus, MA) direct analysis in real time (DART) ion source coupled to a JEOL exact mass time-of-flight mass spectrometer (AccuTOF), was validated and compared with the current screening methodology. The DART ion source allows for analysis of samples under ambient conditions with little to no sample preparation. Fifty drink specimens were spiked at levels of 1, 2, 3, and 4 mg/mL GHB, and analyzed on the AccuTOF-DART. Positive detection of GHB occurred for each of the samples at each concentration level, giving 100% accuracy for the samples tested. Twenty-five of the 50 drink specimens were spiked at 1 mg/mL GHB and tested using a color test known as the GHB Color Test #3. Only two of these 25 specimens tested positive for the presence of GHB, giving only 8% accuracy. Implementation of this new methodology as a screening tool for GHB analysis will quickly eliminate negative specimens allowing the examiner to focus analysis time on those that screened positive.  相似文献   
877.
The use of computer forensics was previously limited mainly to law enforcement agencies. However, UK organisations are increasingly undertaking computer forensics activities for incidents such as fraud, money laundering, accessing or distributing indecent images, harassment, industrial spying and identity theft amongst others. In this paper we examine the legal aspects of UK corporate computer forensic investigations.  相似文献   
878.
Bioprospecting has recently emerged as a new challenge for environmental governance in Antarctica. While considerable attention now surrounds this issue in Antarctica, there has been little, if any, debate on the question of whether bioprospecting is also an issue requiring a policy or regulatory response in the Arctic. This article briefly considers the emerging debate with respect to bioprospecting in Antarctica. It then provides a detailed survey of the nature and extent of bioprospecting in the Arctic, with a focus on the Nordic countries. It goes on to outline legislative developments in several Nordic countries concerning the regulation of access and benefit sharing in relation to naturally occurring biological materials of actual or potential value commonly referred to as wild genetic resources. It concludes by highlighting some potential disputes raised by the creation of such regimes, especially around the disputed waters of Svalbard. This analysis suggests that a more coordinated regional response may be warranted in the Arctic in the future.  相似文献   
879.
880.
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