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   1770篇
  免费   23篇
各国政治   101篇
工人农民   33篇
世界政治   116篇
外交国际关系   86篇
法律   1101篇
中国政治   11篇
政治理论   336篇
综合类   9篇
  2023年   5篇
  2022年   3篇
  2020年   8篇
  2019年   17篇
  2018年   19篇
  2017年   17篇
  2016年   25篇
  2015年   69篇
  2014年   64篇
  2013年   307篇
  2012年   81篇
  2011年   69篇
  2010年   91篇
  2009年   85篇
  2008年   77篇
  2007年   88篇
  2006年   84篇
  2005年   83篇
  2004年   64篇
  2003年   25篇
  2002年   38篇
  2001年   92篇
  2000年   20篇
  1999年   26篇
  1998年   26篇
  1997年   17篇
  1996年   16篇
  1995年   9篇
  1994年   16篇
  1993年   14篇
  1992年   22篇
  1991年   11篇
  1990年   11篇
  1989年   16篇
  1988年   13篇
  1987年   14篇
  1986年   20篇
  1985年   12篇
  1984年   16篇
  1983年   7篇
  1982年   15篇
  1981年   12篇
  1980年   11篇
  1979年   11篇
  1978年   11篇
  1977年   11篇
  1975年   5篇
  1974年   5篇
  1967年   3篇
  1943年   2篇
排序方式: 共有1793条查询结果,搜索用时 15 毫秒
211.
The case of seven urine samples collected for anti-doping purposes during a cycling stage race with moderately elevated testosterone and epitestosterone ratio (T/E) is reported. The very low probability of having all seven urine samples with such similar elevated T/E ratio (from 3.2 to 4.7) was very suspicious. Different pattern classification tools were tested to categorize the most similar steroid profiles, but none of the models enabled a clear classification of the different urine samples. Subsequently, genetic profiling of all urine samples was performed and demonstrated that three of the seven samples were collected from the same cyclist. Finally, the International Federation confirmed DNA profiling results. This suggests that urinary steroid data using several methodologies are not appropriate for identification purposes and to an extent not unique to individuals.  相似文献   
212.
This paper presents a study of the concepts of transferring computer technology among city governments. A sample of cities from a domestic population and an international population are used as the basis of the research. Contrary to expectation, and for both populations, the survey indicated the level of computer applications transfer among cities was found to be low compared to the amount of total application development. It was determined that an important source of transfer information was from “centers” such as the federal government, vendors, and transfer agencies, rather than city to city. International cities that were studied seem to experience a propensity toward centralized control at the national level. These controls often include the transfer of technical information. Further, the types of transfer may vary widely between the domestic vs the international cities. That is, domestic city transfers tend to be operations-oriented, while transfers from national centers tend to be management oriented. In general the study supported prior conclusions concerning the difficulties of transfer. The problem of mismatch and difficulties in modification make transfers very risky. Even so, there are many persons willing to take the risks in order to try to achieve lower costs and to realize the opportunity to obtain sophisticated applications.  相似文献   
213.
A review of the literature was conducted to assess the extent and nature of the practice of requiring parents to transfer custody in order to receive public funding for intensive services needed by their child/adolescent who had a serious emotional disorder. The review focused on the legal and policy basis of this practice as well as its social and psychological impact on child and family. We conclude that the practice of transfer of custody as a requirement for receiving financial aid occurs in a majority of states, though the actual extent of this practice is not known. The major factor influencing the use of transfer of custody appears to be the absence of an appropriate and adequate system of services for children and adolescents with serious emotional disorders. We recommend that the practice of requiring custody transfer for the sole purpose of receiving services be abolished and offer several suggestions for improving acess to services.Preparation of this article was supported in part by the National Institute of Mental Health (NIMH) under contract no. 89MF761903. The authors are grateful to John Burke and Kelly Kelleher of the Division of Biometry and Applied Sciences, NIMH for their assistance on this project. Laurie Flynn, Executive Director for the National Alliance for the Mentally Ill, was very helpful during the informative stage of the project. Barbara Friesen, Director of the Research and Training Center at Portland State University, gave us useful guidance throughout the project. We thank Stephen Hill, Consultant to the National Governors' Association, for his help. We are grateful to Amy Hewitt and Carol Ishler for their assistance in preparing this report. We also would like to acknowledge several individuals who assisted us with research reported in this article. We are grateful to Governor Richard F. Celeste of Ohio for his letter of support for the state survey of custody transfer practices. We appreciate the efforts on behalf of this survey by staff from the State of Ohio, particularly Jean Ellen Stevens, Administrative Assistant to the Director of the Department of Mental Health. Margraret McNally assisted in the compilation of data for both surveys.  相似文献   
214.
215.
Policy Instrument Choice and Diffuse Source Pollution   总被引:2,自引:0,他引:2  
  相似文献   
216.
In addition to blunt and sharp trauma, animal-related fatalities may result from envenomation, poisoning, anaphylaxis, asphyxiation, and sepsis. Although the majority of envenomation deaths are caused by hornets, bees, and wasps, the mechanism of death is most often anaphylaxis. Envenomation resulting from the injection of a poison or toxin into a victim occurs with snakes, spiders, and scorpions on land. Marine animal envenomation may result from stings and bites from jellyfish, octopus, stonefish, cone fish, stingrays, and sea snakes. At autopsy, the findings may be extremely subtle, and so a history of exposure is required. Poisoning may also occur from ingesting certain fish, with three main forms of neurotoxin poisoning involving ciguatera, tetrodotoxin ingestion, and paralytic shellfish poisoning. Asphyxiation may follow upper airway occlusion or neck/chest compression by animals, and sepsis may follow bites. Autopsy analysis of cases requires extensive toxinological, toxicological, and biochemical analyses of body fluids.  相似文献   
217.
It is sometimes objected that we cannot adopt skepticism about moral responsibility, because the criminal justice system plays an indispensable social function. In this paper, I examine the implications of moral responsibility skepticism for the punishment of those convicted of crime, with special attention to recent arguments by Saul Smilansky. Smilansky claims that the skeptic is committed to fully compensating the incarcerated for their detention, and that this compensation would both be too costly to be practical and would remove the deterrent function from incarceration. I argue that the skeptic is not committed to full compensation of the offender, and that the costs of such compensation would in any case be far smaller than Smilansky thinks. In fact, I claim, the costs of the criminal justice system to which the skeptic is committed might be very much lower than the costs ?C economic, social and moral ?C we currently pay as a consequence of our system of punishment.  相似文献   
218.
219.
220.
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