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   2597篇
  免费   24篇
各国政治   177篇
工人农民   95篇
世界政治   163篇
外交国际关系   126篇
法律   1566篇
中国政治   16篇
政治理论   457篇
综合类   21篇
  2023年   18篇
  2022年   13篇
  2021年   13篇
  2020年   46篇
  2019年   54篇
  2018年   61篇
  2017年   84篇
  2016年   77篇
  2015年   51篇
  2014年   68篇
  2013年   288篇
  2012年   66篇
  2011年   96篇
  2010年   64篇
  2009年   64篇
  2008年   84篇
  2007年   81篇
  2006年   72篇
  2005年   74篇
  2004年   73篇
  2003年   77篇
  2002年   60篇
  2001年   74篇
  2000年   65篇
  1999年   66篇
  1998年   36篇
  1997年   29篇
  1996年   29篇
  1995年   21篇
  1994年   23篇
  1993年   24篇
  1992年   44篇
  1991年   43篇
  1990年   50篇
  1989年   45篇
  1988年   43篇
  1987年   32篇
  1986年   46篇
  1985年   34篇
  1984年   27篇
  1983年   21篇
  1982年   15篇
  1981年   23篇
  1979年   22篇
  1978年   24篇
  1977年   20篇
  1974年   13篇
  1971年   19篇
  1970年   17篇
  1968年   17篇
排序方式: 共有2621条查询结果,搜索用时 15 毫秒
171.
It is shown that for verification of human sperm presence on the spots on material evidence it is feasible to apply solid phase enzyme immunoassay (EIA) with the kit "PSA-EIA-BEST T-8458" which is used in clinical practice for diagnosis of prostatic cancer and some other diseases. The method is specific and highly sensitive, convenient for objective registration and computer processing. It is also cost-effective and provides not only significant identification of sperm on the exhibits but also its human origin in complete absence of spermatozoa on the spot.  相似文献   
172.
The international law of state responsibility determines whenstates are liable for international law violations. States aregenerally liable when they have control over the actions ofwrongdoers; thus, the actions of state officials can implicatestate responsibility whereas the acts of private citizens usuallydo not. We argue that the rules of state responsibility havean economic logic similar to that of vicarious liability indomestic law: the law in both cases provides third parties withincentives to control the behavior of wrongdoers whom they canmonitor and influence. We also discuss international legal remediesand individual liability under international criminal law.  相似文献   
173.
Observations of high velocity bloodspatter on adjacent objects   总被引:1,自引:0,他引:1  
In a recent homicide investigation, high velocity backspatter was observed on the sleeve cuff of the accused. These minute droplets were discovered only after microscopic examination and were limited in number. A study was initiated to determine if these were truly backspatter droplets or transferred blood produced from light contact with a bloody item. It was observed that the backspattered blood was primarily limited to contact or near contact shots. An exception was a shot into an already bloody surface. It was found that backspattered blood would deposit on the shooter's shirt sleeve irrespective of the weave pattern. Transferred blood was observed only on the fiber tops. This information was found to be useful in reconstruction of events in suicides as well as possible homicides.  相似文献   
174.
In 1991 the FCC implemented a price cap plan for local exchange carriers' interstate access service designed to deal with the regulatory boundaries problem arising from the breakup of AT&T in 1984. The experience with the price cap plan demonstrates the difficulty of predicting productivity growth accurately and makes clear that regulators cannot depend upon a pure price cap plan to keep prices within a reasonable range of costs. With periodic reviews to readjust plan parameters, however, a price cap plan can maintain the rate-of-return close to the target rate-of-return without diminishing the price cap plan's incentives for efficient production. A simple method of recalculating the X-factor based on the rate-of-return over the previous three years worked well in simulations. If this procedure had been used over the price cap period 1991 to 2000, prices would have been 20 percent lower and expenditures on LECs' telecommunications service subject to a price cap would have been $3.8 billion lower.  相似文献   
175.
176.
177.
178.
This is a study of the exercise of police discretion as indicated by the responses of police recruits to a series of ambiguous, but common incidents. The situations are ambiguous in that they do not call for a clear course of action. The study measures the influence on the use of discretion of certain factors characterizing the police officers and the incidents themselves. The key finding is that the recruits most often seem to impose their own brand of justice based upon their judgement of what the community's expectations of the appropriate police response are. This judgement is most influenced by the accumulation of experience or “street wisdom”.  相似文献   
179.
The photographic identification of a skull through the well-known superprojection technique can be modified and decisively improved by the use of a video-tape system. The identification method based on electronic photo composition is methodically simple to use. It offers the examiner the possibility to recognize the relationship between bone and soft part proportions, and the structure of the bone surface and the details of the soft part shape, as a concrete, tangible characteristic of identity to a substantially greater extent. The large number of controllable characteristics inherent in the ihgh degree of individuality of the skull offers not just an either/or "The skull fits"/ "It does not fit" into a photograph, but achieves proof of disproof of identity.  相似文献   
180.
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