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   949篇
  免费   40篇
各国政治   33篇
工人农民   124篇
世界政治   102篇
外交国际关系   39篇
法律   453篇
中国政治   5篇
政治理论   228篇
综合类   5篇
  2023年   11篇
  2022年   3篇
  2021年   9篇
  2020年   20篇
  2019年   33篇
  2018年   39篇
  2017年   33篇
  2016年   40篇
  2015年   28篇
  2014年   22篇
  2013年   138篇
  2012年   35篇
  2011年   28篇
  2010年   25篇
  2009年   41篇
  2008年   25篇
  2007年   22篇
  2006年   25篇
  2005年   35篇
  2004年   28篇
  2003年   33篇
  2002年   27篇
  2001年   27篇
  2000年   15篇
  1999年   20篇
  1998年   14篇
  1997年   15篇
  1996年   12篇
  1995年   13篇
  1994年   13篇
  1993年   10篇
  1992年   13篇
  1991年   12篇
  1990年   10篇
  1989年   9篇
  1988年   7篇
  1987年   13篇
  1986年   13篇
  1985年   5篇
  1984年   15篇
  1983年   9篇
  1982年   15篇
  1981年   3篇
  1980年   3篇
  1979年   5篇
  1978年   5篇
  1977年   6篇
  1975年   2篇
  1973年   2篇
  1966年   1篇
排序方式: 共有989条查询结果,搜索用时 593 毫秒
241.
Contextual factors that contribute to race differences in reporting crime to the police are an important element in Donald Black??s theory of the behavior of the law, yet few studies have investigated whether these differences vary depending on social context. The present study investigates whether the relationships between victim and offender race and the reporting of crime are moderated by the level of racial stratification in a given place as Black??s stratification hypothesis would predict. Using victim survey data from 40 metropolitan areas, as well as data from other sources, we find results that are consistent with Black??s stratification hypothesis, namely, that victim and offender race are more strongly associated with the reporting of crime in those metropolitan areas where the gap in economic status between blacks and whites is larger and the groups are more residentially segregated. The theory, however, is unable to account for the high rates of reporting of black-on-black assaults found across the 40 metropolitan areas. The question of how the needs of black victims may outweigh their reluctance to call the police is an important issue for future research.  相似文献   
242.
243.
244.
Local authorities in the UK have come under renewed pressure from central government both to adopt Local Agenda 21 and to advance participative democracy. In late 1996/early 1997, the (then) new unitary authority of Bath and North‐East Somerset Council set up a Local Agenda 21 Issue Commission to review its ‘sustainability’ performance and policy development practice with the direct involvement of the community. The way in which the commission was conceived and conducted resulted in difficulties in identifying and carrying out its task. Nonetheless, it kick‐started significant steps towards LA 21 within the council, and provided valuable insights into LA 21 implementation, and the nature of meaningful consultation.  相似文献   
245.
246.
247.
248.
249.
250.
There is currently a debate in the literature on chemical drug analysis concerning the contribution of biophysical attributes associated with specimens and specimen donors to assay outcome. In recent years this debate has focused on hair analysis, but has in the past also been raised in urinalysis interpretation. In this article we examine several aspects of that controversy. First, we present data regarding the effects of hair color on the distribution of positive hair testing results for three drug classes. We compare these results to negative hair samples from comparable donors. This data is derived from head hair from preemployment donors that was classified according to seven visual color categories. We determined the distribution of colors for hair samples devoid of any of three assayed drugs (amphetamines, cocaine, and cannabinoids). Subsequently, this distribution was compared with the distributions for hairs that had tested positive for amphetamines, cocaine or cannabinoids. We examined a total of 2000 randomly selected samples; 500 negative hair samples and 500 positive samples for each of three drugs: cannabinoids, cocaine, and amphetamine. We also evaluated ethnic/racial factors in relation to positive urinalyses for various ethnic/racial groups. We examined approximately 4000 urine specimens from two different groups, each constituting around 2000 specimens. In addition to ethnicity/race and urinalysis outcome, we also examined the relationship between the hair color distributions of urine donors and the corresponding urinalysis results for the three drug classes. We also compared them to drug-negative samples. Our summary impression is that the observed outcome patterns were largely consistent with differences in drug preferences among the various societal groups. There was little evidence of a pattern attributable to hair color bias alone or selective binding of drugs to hair of a particular color. Likewise, there was no discernible pattern associated with race or ethnicity that would lend support to a "race effect" in drug analysis.  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