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   22044篇
  免费   1461篇
各国政治   902篇
工人农民   740篇
世界政治   1552篇
外交国际关系   708篇
法律   15366篇
中国共产党   2篇
中国政治   122篇
政治理论   3932篇
综合类   181篇
  2020年   424篇
  2019年   477篇
  2018年   575篇
  2017年   633篇
  2016年   684篇
  2015年   573篇
  2014年   601篇
  2013年   2239篇
  2012年   555篇
  2011年   647篇
  2010年   725篇
  2009年   714篇
  2008年   551篇
  2007年   506篇
  2006年   619篇
  2005年   445篇
  2004年   449篇
  2003年   461篇
  2002年   421篇
  2001年   836篇
  2000年   754篇
  1999年   604篇
  1998年   273篇
  1997年   278篇
  1996年   222篇
  1995年   251篇
  1994年   278篇
  1993年   238篇
  1992年   443篇
  1991年   470篇
  1990年   455篇
  1989年   476篇
  1988年   439篇
  1987年   412篇
  1986年   429篇
  1985年   419篇
  1984年   394篇
  1983年   370篇
  1982年   261篇
  1981年   238篇
  1980年   213篇
  1979年   295篇
  1978年   182篇
  1977年   156篇
  1976年   151篇
  1975年   154篇
  1974年   180篇
  1973年   155篇
  1972年   133篇
  1971年   125篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
While the concepts of race and ethnicity have been abused historically, they are potentially invaluable in epidemiology and public health. Epidemiology relies upon variables that help differentiate populations by health status, thereby refining public health and health care policy, and offering insights for medical science. Race and ethnicity are powerful tools for doing this. The prerequisite for their responsible use is a society committed to reducing inequalities and inequities in health status. When this condition is met, it is irresponsible not to utilize these concepts.  相似文献   
12.
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   
13.
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   
14.
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   
15.
16.
17.
18.
19.
Acute myoglobinuria as a fatal complication of heroin addiction   总被引:3,自引:0,他引:3  
A fatal case of myoglobinuria complicating heroin addiction is described. Clinically the patient had no overt symptoms of rhabdomyolysis. Pathologists should be alerted to this rare complication in heroin addicts who die of no apparent cause. The antimyoglobin immunoperoxidase technique is useful in confirming the diagnosis.  相似文献   
20.
Stab wounds were made in parenchymatous organs (e.g. liver, spleen, kidneys, lungs) using a variety of instruments. The shape of the resulting canal was investigated by X-ray analysis after introduction of an X-ray contrast medium. The best contrast was obtained using a contrast medium containing barium. The shape of the canal gave a direct representation of the outline of the instrument used. The width of the canal was however, always several millimeters smaller than the corresponding blade of the instrument. The position of the blade back in single-edged blades could be demonstrated with stronger contrast.  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