全文获取类型
收费全文 | 951篇 |
免费 | 40篇 |
专业分类
各国政治 | 36篇 |
工人农民 | 32篇 |
世界政治 | 81篇 |
外交国际关系 | 52篇 |
法律 | 565篇 |
中国共产党 | 3篇 |
中国政治 | 12篇 |
政治理论 | 169篇 |
综合类 | 41篇 |
出版年
2023年 | 8篇 |
2022年 | 8篇 |
2021年 | 8篇 |
2020年 | 27篇 |
2019年 | 30篇 |
2018年 | 33篇 |
2017年 | 28篇 |
2016年 | 36篇 |
2015年 | 26篇 |
2014年 | 40篇 |
2013年 | 107篇 |
2012年 | 43篇 |
2011年 | 40篇 |
2010年 | 41篇 |
2009年 | 38篇 |
2008年 | 41篇 |
2007年 | 29篇 |
2006年 | 34篇 |
2005年 | 44篇 |
2004年 | 37篇 |
2003年 | 35篇 |
2002年 | 35篇 |
2001年 | 29篇 |
2000年 | 29篇 |
1999年 | 15篇 |
1998年 | 18篇 |
1997年 | 4篇 |
1996年 | 8篇 |
1995年 | 10篇 |
1994年 | 7篇 |
1993年 | 3篇 |
1992年 | 5篇 |
1991年 | 5篇 |
1990年 | 5篇 |
1989年 | 8篇 |
1988年 | 10篇 |
1987年 | 8篇 |
1986年 | 14篇 |
1985年 | 6篇 |
1983年 | 7篇 |
1982年 | 3篇 |
1981年 | 2篇 |
1978年 | 2篇 |
1977年 | 2篇 |
1976年 | 4篇 |
1974年 | 4篇 |
1972年 | 3篇 |
1969年 | 2篇 |
1967年 | 4篇 |
1963年 | 1篇 |
排序方式: 共有991条查询结果,搜索用时 15 毫秒
71.
Animal Scavenging and Scattering and the Implications for Documenting the Deaths of Undocumented Border Crossers in the Sonoran Desert, 下载免费PDF全文
Jess Beck M.A. Ian Ostericher M.A. Gregory Sollish B.A. Jason De León Ph.D. 《Journal of forensic sciences》2015,60(Z1):S11-S20
Since 1998, over 5500 people have died while attempting to cross the U.S.–Mexico border without authorization. These deaths have primarily occured in the Arizona desert. Despite the high volume of deaths, little experimental work has been conducted on Sonoran Desert taphonomy. In this study, pig carcasses were used as proxies for human remains and placed in different depositional contexts (i.e., direct sunlight and shade) that replicate typical sites of migrant death. Decomposition was documented through daily site visits, motion-sensitive cameras and GIS mapping, while skeletal preservation was investigated through the collection of the remains and subsequent faunal analysis. Our results suggest that vultures and domestic dogs are underappreciated members of the Sonoran scavenging guild and may disperse skeletal remains and migrant possessions over 25 m from the site of death. The impact of scavengers and the desert environment on the decomposition process has significant implications for estimating death rates and identifying human remains along the Arizona/Mexico border. 相似文献
72.
Journal of Quantitative Criminology - The current study develops a methodology to identify spatially relevant buffer sizes for micro-place evaluation research. It applies this methodology in an... 相似文献
73.
74.
75.
76.
当前大学生恋爱中不良倾向的分析与思考 总被引:5,自引:0,他引:5
当前在大学生恋爱中存在的低龄化、休闲化、时尚化、体验化、实用化、“快餐化”和放纵化等不良倾向,对大学生的成长和成才构成了很大威胁。学校必须加强对大学生恋爱的教育、管理和指导。 相似文献
77.
Accurate age estimation has always been a problem for forensic scientists, and apposition of secondary dentine is often used as an indicator of age. Cameriere et al. studied the pulp/tooth area ratio by peri-apical X-ray images of the canines, to observe the apposition of secondary dentine. The present study examines the application of this technique in a Mexican identified sample coming from the Department of Physical Anthropology of the INAH, at Mexico City. The main aim of this work is to test the reliability of this method in a skeletal sample of a specific population, different from the samples used for its development. The obtained regression model explained 96.2% of total variance (R(2) = 0.962) with a standard error of estimate of 1.909 and a standard deviation of 1.947. These results demonstrate great reliability and that the age/secondary dentine relationship is not variable in this specific population. 相似文献
78.
79.
Chris Lewis Gordon Barclay Bruno Aubusson De Cavarlay Maria JoĀo Morgado Costa Paul Smit 《European Journal on Criminal Policy and Research》2004,10(2-3):187-223
The paper’s aim is to show to EU policy makers, academics, journalists and the general public what the available information tells us about crime levels, trends in crime and public opinion about crime among Member States. The paper centres on an analysis of current trends on crime levels and trends based on the data available both from victimisation surveys and police statistics. The victimisation survey source is the published data collected in the International Crime Victimisation Survey. A separate analysis based on the Eurobarometer was also carried out. Data on police statistics present two separate sources i.e. the Council of Europe Sourcebook and the crime data published annually by the UK Home Office. These two sources both add considerable value to the raw police statistics by their choice of data, their commentary and their technical explanations and definitions. The paper compares data on three crime types (robbery, domestic burglary and theft of a motor vehicle) across the 15 Member States of the European Union (as in 2003). These three types were selected in line with the priorities of the EU Commission and as types of crime that are a major concern for EU-citizens. The paper has been modified from a report produced by the European Crime prevention network for the EU Directorate of Justice and Home Affairs with the permission of the EU. The members of the network are listed in the appendix. 相似文献
80.
The present research examined the extent to which feeling respected, versus feeling disrespected, influences people's willingness to contribute to the public good. Further, it was investigated why such a positive effect of respect should occur. The findings showed that respect indeed had a positive influence on contributions. In addition, it was shown that respect also positively influenced people's feelings of belongingness and that this feeling was found to mediate the effect of respect on contributions. These findings thus indicate that research on social decision-making, and more specifically social dilemmas, has to start devoting more attention to people's noneconomic motives that are independent of outcome concerns when explaining the act of cooperation. 相似文献