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   330篇
  免费   16篇
各国政治   17篇
工人农民   12篇
世界政治   42篇
外交国际关系   12篇
法律   173篇
中国政治   2篇
政治理论   80篇
综合类   8篇
  2022年   3篇
  2021年   4篇
  2020年   9篇
  2019年   7篇
  2018年   7篇
  2017年   5篇
  2016年   13篇
  2015年   7篇
  2014年   6篇
  2013年   56篇
  2012年   12篇
  2011年   14篇
  2010年   14篇
  2009年   12篇
  2008年   21篇
  2007年   6篇
  2006年   16篇
  2005年   9篇
  2004年   10篇
  2003年   6篇
  2002年   5篇
  2001年   7篇
  2000年   2篇
  1999年   4篇
  1998年   6篇
  1997年   9篇
  1996年   5篇
  1995年   2篇
  1994年   3篇
  1993年   3篇
  1992年   8篇
  1991年   3篇
  1990年   2篇
  1989年   2篇
  1988年   4篇
  1987年   4篇
  1986年   4篇
  1984年   5篇
  1983年   3篇
  1981年   5篇
  1980年   3篇
  1979年   2篇
  1977年   3篇
  1973年   2篇
  1970年   1篇
  1969年   1篇
  1968年   1篇
  1967年   2篇
  1966年   2篇
  1956年   1篇
排序方式: 共有346条查询结果,搜索用时 0 毫秒
261.
This article briefly traces the history of the placement of children out of their homes because of parental abuse or neglect. The preference for relative placement is a recent occurrence. The advantages of relative placement instead of foster or group care are summarized as well as the disadvantages. Relative placement rates across the country are about 32%. Several jurisdictions have much higher placement rates including Allegheny County, Pennsylvania. Los Angeles, California, is experimenting with social work practices that have produced over 80% relative placement rates during the past year. How both of these jurisdictions accomplish high relative placement rates is described in detail. Judges should persuade their own social service agencies to adopt these practices.  相似文献   
262.
A custom-made voxel counting software for calculating the ratio between pulp canal versus tooth volume based on cone-beam CT tooth images was developed and evaluated. The aim of this study was to attempt establishing a correlation between the chronological age of a certain individual and the pulp/tooth volume ratio of one of the teeth. Twenty-eight single rooted teeth of 19 individuals with well-known chronological age were scanned by the cone-beam CT (3D Accuitomo, J. Morita, Kyoto, Japan). Next the images were analyzed using the custom-made software. Linear regression analysis was performed. The results of the analysis showed a moderate correlation between the pulp/tooth volume ratio and biological age with a coefficient of determination (R2) of 0.29. Although the present work was limited to a pilot study, the developed technique showed promising results for dental age estimation in a non-invasive manner using cone-beam CT images in living individuals.  相似文献   
263.
Patent ductus arteriosus (PDA) is a recognized risk factor for massive pulmonary hemorrhage (MPH) in the newborn and is generally seen in association with other MPH risk factors such as prematurity. We report 6 cases of sudden and unexpected death of infants older than 4 days with MPH and PDA at autopsy. The cases were reviewed for other factors that could contribute to MPH to ascertain whether PDA is directly linked to MPH. Histology samples were examined for distribution of hemorrhage in the lungs and iron stained for hemosiderin evaluation. All of the cases had clinical histories and scene examinations which raised the differential diagnosis of mechanical asphyxia in the form of so-called overlayings. The diagnostic dilemma of attributing the MPH to the PDA as the sole cause, dual cause, or incidental finding is discussed. These cases illustrate the medicolegal dilemma faced by the pathologist, as well as the need for further research into the potential association of PDA with MPH.  相似文献   
264.
Cognitive developmental theory suggests that mature-level sociomoral reasoning (Stages 3 and 4) can provide a protective factor, or buffer, against antisocial and violent criminal behavior. This study explored whether the influence of internalised criminal sentiments could undermine this buffer. The sample was high-risk men and women offenders (n = 99) convicted of serious violent index offences, and men and women nonoffender university students (n = 101). Moral reasoning was measured using the Sociomoral Reflection Measure-Short Form, whereas criminal sentiments were assessed using the Criminal Sentiments Scale. Based on moral reasoning development level the sample was classified into groups: mature- or immature-level moral reasoners. The results suggested that mature-level sociomoral development might not protect a person from identifying with criminal others, and that law violation could be rationalized regardless of sociomoral level. Gender differences were neither expected nor found. The applied implications of the findings are considered.  相似文献   
265.
266.
267.
268.
269.
Editors' Note     

Introduction

Editors' Note  相似文献   
270.
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