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   1802篇
  免费   465篇
各国政治   385篇
工人农民   50篇
世界政治   218篇
外交国际关系   98篇
法律   766篇
中国政治   37篇
政治理论   679篇
综合类   34篇
  2024年   1篇
  2022年   1篇
  2021年   33篇
  2020年   39篇
  2019年   160篇
  2018年   97篇
  2017年   144篇
  2016年   153篇
  2015年   140篇
  2014年   124篇
  2013年   546篇
  2012年   91篇
  2011年   94篇
  2010年   107篇
  2009年   45篇
  2008年   74篇
  2007年   44篇
  2006年   43篇
  2005年   33篇
  2004年   35篇
  2003年   25篇
  2002年   21篇
  2001年   11篇
  2000年   20篇
  1999年   15篇
  1998年   12篇
  1997年   15篇
  1996年   13篇
  1995年   12篇
  1994年   12篇
  1993年   13篇
  1992年   8篇
  1991年   5篇
  1990年   8篇
  1989年   4篇
  1988年   8篇
  1987年   3篇
  1986年   6篇
  1985年   5篇
  1984年   8篇
  1983年   6篇
  1982年   2篇
  1981年   6篇
  1980年   7篇
  1979年   5篇
  1978年   6篇
  1977年   4篇
  1976年   1篇
  1974年   2篇
排序方式: 共有2267条查询结果,搜索用时 0 毫秒
891.
Abstract: A reconstruction of an incident of a fatal wounding of a football fan with a parachute flare was performed. Physical and chemical examinations of the victim’s trousers and parts of a flare removed from the wound in his leg were performed by means of an optical microscope and a scanning electron microscope coupled with an energy dispersive X‐ray spectrometer. Signs of burning were seen on the front upper part of the trousers, including a 35–40 mm circular hole with melted and charred edges. Postblast residue present on the surface of the trousers contained strontium, magnesium, potassium, and chlorine. Also the case files—the medical reports and the witnesses’ testimonies—were thoroughly studied. It has been found that the evidence collected in the case supported the version of the victim being shot by another person from a distance.  相似文献   
892.
Abstract: Meticulous recovery of victims in the Daegu subway disaster was possible, because charred and fragmented victims were left in situ. Because bodies were piled one over another within the train, appropriate methodology during the recovery was critical to identifying the victims. The disaster area was thoroughly documented with notes, photographs, and schematic drawings of the various locations. The recovery team, comprising two medical examiners and one forensic anthropologist, decided when charred body parts and cremated bones were linked to the same individual based on the anatomy and forensic anthropological examination. Without these recovery procedures, it would not have been possible to efficiently harvest representative DNA sample from most of the victims’ body parts. After the entire process of identification, 136 victims were positively identified, and six victims remained unidentified. This study supports the crucial role of forensic anthropologists in the recovery of victims, especially in fire scenes.  相似文献   
893.
Abstract: The purpose of this study was to develop age‐predicting equations from the anterior cortex of the femur of Korean adults. Seventy‐two femoral samples (44 male and 28 female) were obtained from Korean cadavers and used to develop the equations. The thin sections (<100‐μm thick) were prepared by manual grinding; the sections were not decalcified and were stained with Villanueva bone stain reagent. Analysis of covariance showed no significant differences in age‐adjusted histomorphological variables between sexes. In stepwise regression analysis, osteon population density, average osteon area, and the most anterior cortical width were selected for an age‐predicting equation which produced a high regression correlation (R2 = 0.789). The average Haversian canal area was not significantly related to age for any specimen.  相似文献   
894.
Recent studies have documented substantial penalties associated with motherhood and suggest that discrimination plays an important role in producing them. In this article, I argue that the degree to which motherhood is conceptualized as a choice affects the penalties associated with making this choice. Two methods are employed to evaluate this argument. The first method is an analysis of state differences in the wage penalties for motherhood, in which hierarchical linear modeling is used with data from the 1988–2004 Current Population Survey. The second method is a hiring experiment in a highly controlled setting. The wage analysis shows that, net of the usual individual and state‐level factors that affect wages, mothers are penalized more in states where motherhood is perceived to be a woman's choice. The hiring experiment distinguishes between productivity‐based and discrimination‐based explanations for the penalty and provides strong evidence for a causal relationship between perceptions of choice and discrimination against mothers.  相似文献   
895.
896.
897.
THE ILLUSION     
  相似文献   
898.
899.
A national labor market has emerged as one of the most fundamental institutional changes in the PRC. Foreign direct investment has played a direct role. The Chinese national labor market, albeit with noticeable distortions, has provided a stable and abundant supply of cheap unskilled or low‐skilled labor and subsidized skilled labor and professionals, and enhanced labor mobility and autonomy in general. The national labor market has been strongly blessed by Beijing, as it feels it can effectively rely on the hukou (household registration) system to stabilize the massive underemployment at a time of comprehensive dislocations caused by the advancing market economy. The sociopolitical impact of the national labor market, however, is mounting as urban unemployment rises, the numbers of floating laborers grow and become increasingly restless, and the PRC government has become more apparently pro‐employer at the expense of labor.  相似文献   
900.
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