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   655篇
  免费   31篇
各国政治   28篇
工人农民   14篇
世界政治   42篇
外交国际关系   26篇
法律   342篇
中国政治   4篇
政治理论   226篇
综合类   4篇
  2021年   6篇
  2020年   13篇
  2019年   11篇
  2018年   18篇
  2017年   21篇
  2016年   20篇
  2015年   12篇
  2014年   18篇
  2013年   88篇
  2012年   29篇
  2011年   19篇
  2010年   10篇
  2009年   23篇
  2008年   21篇
  2007年   32篇
  2006年   20篇
  2005年   10篇
  2004年   23篇
  2003年   24篇
  2002年   16篇
  2001年   9篇
  2000年   22篇
  1999年   10篇
  1998年   9篇
  1997年   7篇
  1996年   8篇
  1995年   8篇
  1994年   9篇
  1993年   12篇
  1992年   11篇
  1991年   12篇
  1990年   17篇
  1989年   8篇
  1988年   13篇
  1987年   10篇
  1986年   7篇
  1985年   11篇
  1984年   8篇
  1983年   6篇
  1982年   4篇
  1981年   4篇
  1980年   6篇
  1979年   6篇
  1978年   9篇
  1977年   3篇
  1976年   4篇
  1975年   6篇
  1974年   2篇
  1973年   2篇
  1965年   3篇
排序方式: 共有686条查询结果,搜索用时 15 毫秒
71.
The general movement to joint stock enterprise could not take place until certain economic and legal changes had been effected … The legal change was the substitution of the law of corporations for the law of partnership in company affairs. Investors could then invest safely and full exploitation of the economic changes became possible … Out before the legal changes of 1844 and 1855. English law virtually prohibited joint-stock enterprise for ordinary trading and manufacturing purposes.1  相似文献   
72.
73.
74.
In response to lawyers' critiques of earlier staged-crime, mock-jury studies, 16 eyewitnesses to a staged crime were videotaped while being questioned by lawyers in a real courthouse. Accurate and inaccurate eyewitnesses were questioned by experienced or inexperienced lawyers for the prosecution and defense. Subsequently, 178 University of Alberta undergraduates served as mock-jurors and attempted to detect the accuracy of the witnesses based on their taped testimony. As in the previous research, the overall rate of belief was quite high (69%), and the subjects believed the testimony of accurate and inaccurate eyewitnesses at about the same rate (68% vs. 70%, respectively). Lawyers' experience failed to influence verdict. Confidence of the eyewitness was significantly related to belief of their testimony. The data replicate the previous findings and demonstrate that lack of expertise of the questioners does not account for the failure to detect eyewitness accuracy in this paradigm.The authors wish to thank 36 lawyers and senior law students from the Kingston area who donated their time. The research was supported by a grant to the first author from the Social Sciences and Humanities Research Council of Canada.  相似文献   
75.
76.
77.
78.
79.
Transnational Models for Regulation of Nanotechnology   总被引:4,自引:0,他引:4  
Like all technologies, nanotechnology will inevitably present risks, whether they result from unintentional effects of otherwise beneficial applications, or from the malevolent misuse of technology. Increasingly, risks from new and emerging technologies are being regulated at the international level, although governments and private experts are only beginning to consider the appropriate international responses to nanotechnology. In this paper, we explore both the potential risks posed by nanotechnology and potential regulatory frameworks that law may impose. In so doing, we also explore the various rationales for international regulation including the potential for cross-boundary harms, sharing of regulatory expertise and resources, controlling protectionism and trade conflicts, avoiding a "race to the bottom" in which governments seek economic advantage through lax regulation, and limiting the "nano divide" between North and South. Finally, we examine some models for international regulation and offer tentative thoughts on the prospects for each.  相似文献   
80.
The Scent Transfer Unit (STU-100) is a portable vacuum that uses airflow through a sterile gauze pad to capture a volatiles profile over evidentiary items for subsequent canine presentation to assist law enforcement personnel. This device was evaluated to determine its ability to trap and release organic compounds at ambient temperature under controlled laboratory conditions. Gas chromatography-mass spectrometry (GC-MS) analyses using a five-component volatiles mixture in methanol injected directly into a capture pad indicated that compound release could be detected initially and 3 days after the time of collection. Additionally, 15 compounds of a 39-component toxic organic gaseous mixture (10-1000 parts per billion by volume [p.p.b.(v)]) were trapped, released, and detected in the headspace of a volatiles capture pad after being exposed to this mixture using the STU-100 with analysis via GC-MS. Component release efficiencies at ambient temperature varied with the analyte; however, typical values of c. 10% were obtained. Desorption at elevated temperatures of reported human odor/scent chemicals and colognes trapped by the STU-100 pads was measured and indicated that the STU-100 has a significant trapping efficiency at ambient temperature. Multivariate statistical analysis of subsequent mass spectral patterns was also performed.  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