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   79214篇
  免费   3309篇
各国政治   4620篇
工人农民   3172篇
世界政治   6679篇
外交国际关系   3971篇
法律   40828篇
中国共产党   12篇
中国政治   776篇
政治理论   21514篇
综合类   951篇
  2021年   433篇
  2020年   1203篇
  2019年   1554篇
  2018年   1839篇
  2017年   2152篇
  2016年   2324篇
  2015年   1870篇
  2014年   2143篇
  2013年   10710篇
  2012年   1918篇
  2011年   2085篇
  2010年   2011篇
  2009年   2189篇
  2008年   2077篇
  2007年   2098篇
  2006年   2230篇
  2005年   2093篇
  2004年   1979篇
  2003年   1790篇
  2002年   1819篇
  2001年   2298篇
  2000年   2034篇
  1999年   1722篇
  1998年   1267篇
  1997年   1084篇
  1996年   1066篇
  1995年   1023篇
  1994年   1074篇
  1993年   1058篇
  1992年   1246篇
  1991年   1285篇
  1990年   1220篇
  1989年   1252篇
  1988年   1238篇
  1987年   1241篇
  1986年   1279篇
  1985年   1290篇
  1984年   1163篇
  1983年   1170篇
  1982年   1006篇
  1981年   956篇
  1980年   766篇
  1979年   871篇
  1978年   675篇
  1977年   611篇
  1976年   554篇
  1975年   503篇
  1974年   521篇
  1973年   509篇
  1972年   439篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
Technology transfer has generally had little impact on the assistive technology industries serving small, highly fragmented “disability markets.” Persons with disabilities often require specialized, relatively sophisticated technology. Third-party payer reimbursement rates and the low levels of disposable income among disability populations often cap product pricing. Transferring technology to these industry segments therefore poses special challenges. In October 1998, the Rehabilitation Engineering Research Center on Technology Transfer initiated the “Demand-Pull Project on Wheeled Mobility.” Successful transfers resulting from this project demonstrate that a systematic technology transfer process can be successfully applied to industries serving specialized and underserved niche markets.  相似文献   
63.
The EU has regulated chemicals since the late 1960s using both general and sectoral legislation, and exposure-based, hazard-based and risk-based decisions. A new proposal from the European Commission – on the Registration, Evaluation and Authorization of Chemicals (REACH) – will build on the experiences of the existing legislation and introduce some new concepts in the management of chemicals. This article is aimed at assessing the current chemical control mechanisms in the EU and those put forward in REACH to demonstrate how REACH is a new paradigm in chemicals management. REACH will carry forward today's experience and approach to the management of chemicals in the EU and introduces some novel aspects, such as utilizing market-based mechanisms and putting into operation the 'substitution principle'.  相似文献   
64.
65.
66.
In 1970, the Congress enacted the Organized Crime Control Act. Title IX of the 1970 Act is the Racketeer Influence and Corrupt Organization Act or RICO. This Act had its origins in legislation going back as far as 1934, but coming forward to 1961. The 1970 Act borrowed ideas from this earlier legislation, principally “enterprise,” but also the use predicate statutes to define “racketeering activity.” The ideas are not new, but their combination affects how prosecutors and law enforcement agents investigate, try, and sanction violations of the Act. RICO’s drafting also reflects organizational theory and economic analysis. The investigation and prosecution of a single crime committed by an individual on a single day and in a single place maybe done using one set of procedural and evidentiary rules. Nevertheless, the investigation and prosecution of patterns of diverse offenses committed by, through, and against licit and illicit enterprises require sophisticated procedures, evidentiary rules, and criminal sanctions. In addition, antisocial conduct is more than a challenge to the administration of criminal justice; it also requires the full panoply of civil sanctions, including public injunctions as well private enforcement of injunctive relief and treble damages. RICO has had a profound effect on the prosecution of organized crime, white-collar crime, and other forms of similar criminal behavior. William J. & Dorothy K. O’Neill Professor of Law, Notre Dame Law School; A.B. 1957, University of Notre Dame; J.D. 1960, Notre Dame Law School. Professor Blakey was the Chief Counsel of the Subcommittee on Criminal Laws and Procedures of the United States Senate Committee on the Judiciary in 1969-70 when the Organized Crime Control Act of 1970, Pub. L. No. 91-542, 84 Stat. 922 (1970) was processed, Title IX of which is the Racketeer Influence and Corrupt Organization Act or RICO. For a general treatment of the statute from a variety of perceptive, see the collection of law review literature in G. Robert Blakey & Kevin Roddy, “Reflections on Reves v. Ernst & Young: Its Meaning an Impact on Substantive, Accessory, Aiding, Abetting and Conspiracy Liability under RICO,” 33 Amer. Crim. L. Rev. 1345, 1348 n. 3(1996).  相似文献   
67.
68.
69.
70.
The present study measured the existence of traumatic stress symptomatology as reported by certified law enforcement officers within the State of Delaware. A questionnaire was devised which documented age, sex, race, education, years of service, marital status, children, rank, position, and shift work. The questionnaire was divided into parts which assessed the exposure and the frequency of specific traumatic incidents experienced in the line of duty, and the frequency of experienced traumatic symptomatology criteria: re-experiencing, numbing, and arousal.  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