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   32473篇
  免费   1184篇
各国政治   1401篇
工人农民   1266篇
世界政治   2556篇
外交国际关系   1101篇
法律   19919篇
中国共产党   5篇
中国政治   173篇
政治理论   6974篇
综合类   262篇
  2020年   448篇
  2019年   547篇
  2018年   670篇
  2017年   801篇
  2016年   848篇
  2015年   614篇
  2014年   697篇
  2013年   3323篇
  2012年   772篇
  2011年   857篇
  2010年   738篇
  2009年   781篇
  2008年   870篇
  2007年   834篇
  2006年   857篇
  2005年   783篇
  2004年   785篇
  2003年   784篇
  2002年   744篇
  2001年   1201篇
  2000年   1113篇
  1999年   852篇
  1998年   543篇
  1997年   474篇
  1996年   405篇
  1995年   393篇
  1994年   452篇
  1993年   421篇
  1992年   631篇
  1991年   690篇
  1990年   611篇
  1989年   630篇
  1988年   605篇
  1987年   615篇
  1986年   643篇
  1985年   620篇
  1984年   534篇
  1983年   558篇
  1982年   422篇
  1981年   404篇
  1980年   319篇
  1979年   435篇
  1978年   291篇
  1977年   256篇
  1976年   238篇
  1975年   206篇
  1974年   253篇
  1973年   241篇
  1972年   217篇
  1970年   174篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
93.
The remains of an unidentified female neonate were discovered in a field in central Missouri. Examination revealed bilateral absence of the parietal bones. A search of the literature describing similar defects suggests that the present case represents a unique condition, described here for the first time.  相似文献   
94.
95.
96.
97.
Prior studies of recidivism have focused almost exclusively on individual‐level characteristics of offenders and their offenses to explore the correlates of reoffending. Notably absent from these studies are measures reflecting the neighborhood contexts in which individuals live. The current research addresses this shortcoming. Using data on a sample of ex‐offenders in Multnomah County, Oregon (Portland and surrounding area) in conjunction with 2000 census data, we answer two questions. First, which individual‐level factors influence rates of recidivism? Second, to what extent does neighborhood socioeconomic status account for variation in the reoffending behavior of ex‐prisoners that is not explained by their individual‐level characteristics? We find that those who return to disadvantaged neighborhoods recidivate at a greater rate while those who return to resource rich or affluent communities recidivate at a lesser rate, controlling for individual‐level factors.  相似文献   
98.
Offender assessment and classification is becoming an increasingly important part of correctional supervision and intervention. Over the last several decades, several different methods and “generations” of offender classification have emerged. Of most value appear to be third-generation, actuarial, dynamic risk/need assessments. With any new correctional strategy, however, there is a need to investigate the use of these risk/need assessments on offender subgroups in order to inform issues, such as reliability and prevalence of criminogenic risk factors. The present study utilized data that were gathered using the Level of Service Inventory-Revised (LSI-R). Results and comparisons of these assessments were investigated and presented for Native American and non-Native American offenders as well as male and female offenders. Discussion of the results, implications, and recommendations for further research are presented.  相似文献   
99.
Esophageal and tracheal fistulas, which occur in 0.05% of medicolegal autopsies, were demonstrated in three cases by a postmortem radiographic technique using silicone rubber/lead oxide as a contrasting medium that vulcanizes at room temperature. In one 83-year-old male, a tracheoesophageal fistula was detected, which had developed after surgical repair of an esophageal rupture caused by a flexible fiberoptic endoscope. In a second case, carcinoma of the esophagus in a 78-year-old male had eroded the trachea and arcus of the aorta creating a fatal tracheoesophagoaortic fistula. In a third case, 55-year-old female developed a tracheobrachicephalic artery fistula as a result of an infiltrating cystic adenocarcinoma of the trachea, resulting in a fatal hemorrhage into the trachea. The results of this study indicate that diagnostic radiologic methods using a vulcanized contrasting medium are useful in supplementing normal dissection in autopsy cases with suspected fistulas of the esophagus or trachea.  相似文献   
100.
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