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   12765篇
  免费   440篇
各国政治   746篇
工人农民   484篇
世界政治   964篇
外交国际关系   504篇
法律   7789篇
中国共产党   2篇
中国政治   173篇
政治理论   2441篇
综合类   102篇
  2020年   175篇
  2019年   191篇
  2018年   275篇
  2017年   307篇
  2016年   318篇
  2015年   271篇
  2014年   285篇
  2013年   1412篇
  2012年   331篇
  2011年   426篇
  2010年   303篇
  2009年   335篇
  2008年   351篇
  2007年   310篇
  2006年   320篇
  2005年   283篇
  2004年   321篇
  2003年   339篇
  2002年   254篇
  2001年   519篇
  2000年   437篇
  1999年   386篇
  1998年   184篇
  1997年   151篇
  1996年   145篇
  1995年   149篇
  1994年   149篇
  1993年   156篇
  1992年   240篇
  1991年   235篇
  1990年   222篇
  1989年   197篇
  1988年   239篇
  1987年   231篇
  1986年   250篇
  1985年   248篇
  1984年   227篇
  1983年   233篇
  1982年   127篇
  1981年   102篇
  1980年   98篇
  1979年   129篇
  1978年   108篇
  1977年   88篇
  1976年   83篇
  1975年   88篇
  1974年   94篇
  1972年   76篇
  1971年   80篇
  1968年   75篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
83.
In the forensic science laboratory, the recovery of spermatozoa from vaginal swabs, or vaginal cells from penile swabs, can help determine if sexual intercourse may have taken place. There are several methods used to recover spermatozoa and cells from the swabs before visualisation on a microscope slide and most of these methods use water. Phosphate buffered saline (PBS) is a non-toxic solution used in many biological laboratories. Unlike water, PBS prevents cells rupturing or shrivelling up due to osmosis. This study demonstrates that PBS can be used for the extraction of spermatozoa and cells from swabs and that PBS does not affect subsequent DNA profiling.  相似文献   
84.
Can participatory programs in transitioning countries increase the involvement of citizens beyond the level expected from individual-level characteristics, such as demographic traits, socioeconomic resources, and civic orientations? To answer this question, I examine the causes of participation in the Ugandan constitution-making process. Statistical analysis of a random sample survey of 820 citizens demonstrates that although individual-level factors play a role, many Ugandans participated because mobilizing agents pulled them into the process. I argue that programs to encourage active and equal participation will be most successful if they supplement weak indigenous institutions of mobilization and help all types of citizens to participate early on in the transition to democracy.  相似文献   
85.
Sixteen major evaluations of programs to prevent school bullying, conducted in 11 different countries, are reviewed in detail. Of these 16 evaluations, 8 produced desirable results, 2 produced mixed results, 4 produced small or negligible effects, and 2 produced undesirable results. These varying findings may reflect variations in programs, in implementation, in assessment methods, or in evaluation designs. It is concluded that high-quality evaluations are needed in the future, with randomized designs, theoretically grounded interventions, multiple measures of bullying, and attempts to disentangle the effectiveness of different program components.  相似文献   
86.
Recent studies point to the potential theoretical and practical benefits of focusing police resources on crime hot spots. However, many scholars have noted that such approaches risk displacing crime or disorder to other places where programs are not in place. Although much attention has been paid to the idea of displacement, methodological problems associated with measuring it have often been overlooked. We try to fill these gaps in measurement and understanding of displacement and the related phenomenon of diffusion of crime control benefits. Our main focus is on immediate spatial displacement or diffusion of crime to areas near the targeted sites of an intervention. Do focused crime prevention efforts at places simply result in a movement of offenders to areas nearby targeted sites—“do they simply move crime around the corner”? Or, conversely, will a crime prevention effort focusing on specific places lead to improvement in areas nearby—what has come to be termed a diffusion of crime control benefits? Our data are drawn from a controlled study of displacement and diffusion in Jersey City, New Jersey. Two sites with substantial street‐level crime and disorder were targeted and carefully monitored during an experimental period. Two neighboring areas were selected as “catchment areas” from which to assess immediate spatial displacement or diffusion. Intensive police interventions were applied to each target site but not to the catchment areas. More than 6,000 20‐minute social observations were conducted in the target and catchment areas. They were supplemented by interviews and ethnographic field observations. Our findings indicate that, at least for crime markets involving drugs and prostitution, crime does not simply move around the corner. Indeed, this study supports the position that the most likely outcome of such focused crime prevention efforts is a diffusion of crime control benefits to nearby areas.  相似文献   
87.
In December 2001, Argentina experienced a decisive crisis. A financial collapse accelerated by the massive flight of capital and the IMF denial of a new loan was followed by a popular insurrection which, by putting forward the slogan ¡ que se vayan todos, que no quede ni uno solo ! forced the resignation of national authorities. Whilst Duhalde's provisional government is negotiating the conditions for international financial support, faced with inflation and the rise of the dollar exchange rate, social mobilisation is expanding in new forms. This paper argues that the popular insurrection of December 2001 opened a space for the reinvention of the political as negative politics, the asambleas barriales constituting one example of this.  相似文献   
88.
Toxicologic findings in the USS Iowa disaster.   总被引:5,自引:0,他引:5  
The toxicologic results from the 47 victims of the explosion on the USS Iowa are presented. Good correlation between carboxyhemoglobin saturations and cause of death was found. There were no correlations between blood cyanide concentrations and causes of death. Volatile analysis suggested postmortem ethanol production rather than antemortem ethanol ingestion. No drugs except nicotine were detected in any of the victims.  相似文献   
89.
90.
Presents forensic medical characteristics of the specific features of stabbed and cut injuries of human skin and jersey. Suggests a complex of signs that will help determine some structural parameters of a knife blade and the conditions of its interaction with the injured site of human body.  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