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   18082篇
  免费   1360篇
各国政治   802篇
工人农民   659篇
世界政治   1259篇
外交国际关系   557篇
法律   12689篇
中国共产党   1篇
中国政治   172篇
政治理论   3179篇
综合类   124篇
  2020年   393篇
  2019年   414篇
  2018年   488篇
  2017年   567篇
  2016年   590篇
  2015年   516篇
  2014年   526篇
  2013年   1899篇
  2012年   425篇
  2011年   514篇
  2010年   661篇
  2009年   599篇
  2008年   442篇
  2007年   426篇
  2006年   520篇
  2005年   383篇
  2004年   367篇
  2003年   372篇
  2002年   322篇
  2001年   666篇
  2000年   554篇
  1999年   486篇
  1998年   235篇
  1997年   207篇
  1996年   173篇
  1995年   191篇
  1994年   216篇
  1993年   177篇
  1992年   320篇
  1991年   366篇
  1990年   355篇
  1989年   351篇
  1988年   342篇
  1987年   329篇
  1986年   354篇
  1985年   342篇
  1984年   335篇
  1983年   290篇
  1982年   222篇
  1981年   212篇
  1980年   188篇
  1979年   256篇
  1978年   170篇
  1977年   142篇
  1976年   117篇
  1975年   142篇
  1974年   155篇
  1973年   139篇
  1972年   112篇
  1971年   106篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
The purpose of this investigation was to identify inmate personal and demographic data that may be used to further define or profile persons with a greater likelihood of being at risk for serving a jail sentence. This study was explorative. The survey administration was similar in format to that conducted by the U.S. Department of Justice. Chaplains were used as survey proctors. Pilot studies were conducted to determine the suitability of survey content. Surveys consisted of 172 items. Subjects included four hundred inmates: males comprised 88.75 percent of the sample, Caucasians 58.25 percent, Blacks 37 percent, Hispanics 3.25 percent and other 1.5 percent of the sample. Respondents ranged in age from 15 to 64 years with an average age of 30.3 years. Less than two percent of the contacted inmates refused participation in the survey. Results are presented for demographic data, select legal/criminal data, select drug and alcohol use data, employment data, health, parent/family data, education data, social data, and “other”.  相似文献   
102.
A growing body of evidence shows that minorities are disproportionately the targets of police brutality, but important theoretical questions about the causes of that inequity remain unanswered. One promising line of research involves structural‐level analyses of the incidence of police brutality complaints; however, existing studies do not incorporate variables from alternative theoretical explanations. Drawing on the community accountability hypothesis and the threat hypothesis, we tested the predictions of two prominent structural‐level explanations of police brutality in a study of civil rights criminal complaints. The study included cities of 150,000+ population (n = 114). The findings reveal that two community accountability variables—ratio percent Hispanic citizens to percent Hispanic police officers and the presence of citizen review—were related positively to police brutality complaints, partially supporting that perspective. Two threat hypothesis measures of threatening people—percent black and percent Hispanic (in the Southwest)—were related positively to complaints, as predicted. The relative degree of support for the two hypotheses is assessed.  相似文献   
103.
104.
Some features of early child care are more prominent in Norway than in other countries, such as emphasis on the outdoor environment. Of general relevance and interest is the form of day care provided by forest day-care centers. Three ideas form the development of these centers placed in wild areas. First, throughout history, Norwegians have had a close attachment to nature and some parents want to provide their children with outdoor experiences at an early age. Second, urging children to play outdoors characterizes the image many parents have of a happy, healthy childhood. Third, provision of day care for children has always been restricted in western countries, forcing parents to invent types of service that can become part of an ecological system that promotes healthy development.The forest day-care centers developed recently represent a supplement to the wide typology of child care in the 21st century. The article outlines the connections between these ideas in general European and western history and Norwegian history and presents debate and decisions about a question dating from the last half of the 1980s. It concludes that the forest day-care centers are perhaps only a modern form of the original kindergarten concept, which started in Europe and America as gardens for children not gardens of children.  相似文献   
105.
Ethanol was determined by gas chromatography in a variety of tissues and body fluids secured at autopsy in 61 cases. The specimens tested included right and left heart blood, femoral blood, pericardial fluid, cerebrospinal fluid, vitreous humor, urine, stomach contents, and brain. Statistical analysis of the cases revealed no significant differences among the various blood sites tested. However, the variations in blood ethanol concentrations among the various sampling sites within each case were as follows: 40 cases showed differences of less than 25%; 16 cases revealed variability between 25% and 50%, 4 cases had differences exceeding 50%. In one case, satisfactory blood analyses could not be accomplished. The larger variances occurred especially in those instances in which stomach alcohol concentration was 0.50% or greater. In one case, the variability amongst the different blood sites exceeded 400% (femoral blood--0.043%, right atrium--0.070%, root of aorta--0.156%); the brain was 0.050%, and the stomach contents was 1.2%. For all 61 cases, variances in blood alcohol content among the different sampling sites in a single cadaver ranged from 1.8 to 428%.  相似文献   
106.
Within the context of legal reform, the Battered Wife Movement has divided feminists on the question of criminal justice as a desirable component of a feminist agenda. Thus it provides a good example of the dilemmas of developing a feminist theory about the state as the basis for informed practice. In this paper, Currie overviews the way in which the BWM has been transformed from a radical demand for the redistribution of social power into an expansion of current patriarchal institutions. As an example of the institutionalization of feminist issues, however, she rejects explanations of this transformation as simply ideological revision by the state. Rather, Currie notes that it occurs through and not against feminist discourse, meaning that we must acknowledge theory as practice if we are to develop a truly subversive and liberatory discourse within feminist scholarship.  相似文献   
107.
108.
109.
110.
Deoxyribonucleic acid (DNA) typing of ribosomal ribonucleic acid (rRNA) genes was performed with a polymerase chain reaction (PCR) assay for species identification. A variable region of the 28S ribosomal RNA gene was amplified with primers complementary to flanking sequences phylogenetically well conserved. The products of twelve animal DNAs (human, Japanese monkey, dog, cattle, pig, cat, rabbit, mouse, rat, chicken, frog, and fish) were separated by polyacrylamide gel electrophoresis, each revealing a few bands ranging from 150 to 100 base pairs. The band patterns obtained from each DNA sample differed in number and size, which indicates the applicability of the method to species identification. Samples containing either as little as 1 pg of DNA or degraded DNA of 0.2 to 0.5 kb in length were able to give detectable bands. Postmortem human tissue DNAs were tested as an example. They showed a pattern identical to the human control one, which was distinct from those of the other animals examined.  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