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   10773篇
  免费   597篇
各国政治   452篇
工人农民   392篇
世界政治   839篇
外交国际关系   319篇
法律   7221篇
中国共产党   1篇
中国政治   61篇
政治理论   2042篇
综合类   43篇
  2021年   63篇
  2020年   196篇
  2019年   240篇
  2018年   241篇
  2017年   302篇
  2016年   308篇
  2015年   254篇
  2014年   275篇
  2013年   1036篇
  2012年   247篇
  2011年   312篇
  2010年   292篇
  2009年   309篇
  2008年   293篇
  2007年   273篇
  2006年   284篇
  2005年   257篇
  2004年   260篇
  2003年   244篇
  2002年   248篇
  2001年   472篇
  2000年   426篇
  1999年   296篇
  1998年   185篇
  1997年   156篇
  1996年   126篇
  1995年   119篇
  1994年   154篇
  1993年   132篇
  1992年   198篇
  1991年   218篇
  1990年   214篇
  1989年   215篇
  1988年   209篇
  1987年   194篇
  1986年   234篇
  1985年   210篇
  1984年   164篇
  1983年   176篇
  1982年   116篇
  1981年   125篇
  1980年   85篇
  1979年   136篇
  1978年   76篇
  1977年   75篇
  1976年   71篇
  1974年   75篇
  1973年   67篇
  1972年   66篇
  1970年   47篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
731.
Social security and private saving: theory and historical evidence   总被引:1,自引:0,他引:1  
This article is a nontechnical presentation of the debate that has gone on during the past decade over whether the U.S. social security system has depressed private saving in the economy. The heart of the article is an assessment of economist Martin Feldstein's original evidence, presentation of the alternative evidence that concluded that currently available historical data do not support the proposition that social security reduces private saving, and an evaluation of the contradictory evidence presented by Feldstein in response to the alternative evidence. The article concludes that, although the total body of evidence is inconclusive, the historical evidence fails to support the hypothesis that social security has reduced private saving. The Office of Research, Statistics, and International Policy, as part of its ongoing research mission, investigates the interrelationship between social security and the economy. This article presents an examination of one of several aspects of this relationship relevant to public policy considerations and is intended to make previously published technical papers available to a broader audience.  相似文献   
732.
733.
734.
This paper begins by assessing the current status of health care advertising and its potential for growth, arguing that this form of marketing is not just a passing fad among a few clinics and hospitals. It then describes the opposing schools of thought concerning the economics of advertising, and considers both theory and evidence on the effects of advertising on prices, profits, quality, utilization, and innovation.  相似文献   
735.
A new method for diatom detection is described. It includes an ultrasonic irradiation procedure with the use of a tissue solubilizer. The method is easy to carry out and is less time-consuming than previous techniques.  相似文献   
736.
737.
738.
The fields mainly covered by clinical forensic medicine are subject to time-related changes which are described on the basis of the German literature of the 20th century. Some fields of forensic sexual medicine (diagnosis of virginity, proof of criminal abortion, potentia coeundi, potentia generandi, potentia concipiendi) have become less important in the daily work of medicolegal institutes, whereas victims of rape and sexual abuse continue to form a major part of the forensic examination material in the German-speaking countries. The evaluation of suspected physical child abuse has grown in importance since the 60s, and it is essentially the merit of Elisabeth Trube-Becker that this problem is now dealt with also in scientific medicine. More recently, medicolegal experts are increasingly confronted with further groups of persons: victims of domestic violence, abused/neglected seniors, refugees from countries where torture is used. A new special field, which established itself only in the 90s, is the estimation of age with regard to the criminal responsibility of suspects who have no identity papers or pretend to have none. A phenomenon frequently observed in the last two decades is the non-accidental self-infliction of injuries. Whereas in the first half of the 20th century the motive for self-mutilation was typically to evade military service, this category of injury was later mainly seen in the context of insurance fraud; more recently most forensically relevant self-inflicted injuries refer to simulated offenses (fictitious sexual offenses and robbery, attacks allegedly having a political background). One of the traditional fields of clinical forensic medicine continues to be the evaluation of victims and suspects following bodily harm and attempted homicides. In the field of civil law medicolegal experts are particularly often concerned with controversial consequences of traffic accidents (e.g. alleged whiplash injuries after rear-end collisions at low velocities).  相似文献   
739.
Eight Y chromosome short tandem repeat (STR) polymorphisms (DYS19, DYS385, DYS389I, DYS389II, DYS390, DYS391, DYS392, and DYS393) were analyzed in the sample of 117 unrelated Albanian males living in Kosovo. A general STR allelic frequency pattern in the Albanian population from Kosovo corresponds to other European populations. Fourty six haplotypes were observed in single copy. The most frequent haplotypes were (DYS19-DYS385-DYS389I-DYS389II-DYS390-DYS391-DYS392-DYS393) 14-11/11-13-29-24-11-13-13 (10.26%), 14-14/17-12-28-24-10-11-12 (9.40%), 13-16/18-13-30-24-10-11-13 (9.40%), and 14-17/17-13-31-24-10-11-13 (9.40%).  相似文献   
740.
Spamming is a major threat to the formation of public trust in the Internet and discourages broader civil participation in the emerging information society. To the individual, spams are usually little more than a nuisance, but collectively they expose Internet users to a panoply of new risks while threatening the communications and commercial infrastructure. Spamming also raises important questions of criminological interest. On the one hand it is an example of a pure cybercrime – a harmful behaviour mediated by the Internet that is the subject of criminal law, while on the other hand, it is a behaviour that has in practice been most effectively contained technologically by the manipulation of ‘code’ – but at what cost? Because there is not an agreed meaning as to what constitutes ‘online order’ that renders it simply and uncritically reducible to a set of formulae and algorithms that can be subsequently imposed (surreptitiously) by technological processes. The imposition of order online, as it is offline, needs to be subject to critical discussion and also checks and balances that have their origins in the authority of law. This article deconstructs and analyses spamming behaviour, before exploring the boundaries between law and code (technology) as governance in order to inform and stimulate the debate over the embedding of cybercrime prevention policy within the code itself.  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