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   25771篇
  免费   993篇
各国政治   1076篇
工人农民   964篇
世界政治   2116篇
外交国际关系   857篇
法律   15963篇
中国共产党   2篇
中国政治   124篇
政治理论   5455篇
综合类   207篇
  2021年   140篇
  2020年   375篇
  2019年   448篇
  2018年   514篇
  2017年   625篇
  2016年   675篇
  2015年   501篇
  2014年   572篇
  2013年   2546篇
  2012年   600篇
  2011年   686篇
  2010年   586篇
  2009年   637篇
  2008年   677篇
  2007年   669篇
  2006年   661篇
  2005年   600篇
  2004年   598篇
  2003年   619篇
  2002年   582篇
  2001年   1037篇
  2000年   931篇
  1999年   719篇
  1998年   448篇
  1997年   374篇
  1996年   313篇
  1995年   309篇
  1994年   377篇
  1993年   330篇
  1992年   499篇
  1991年   547篇
  1990年   490篇
  1989年   510篇
  1988年   484篇
  1987年   488篇
  1986年   512篇
  1985年   497篇
  1984年   416篇
  1983年   447篇
  1982年   343篇
  1981年   339篇
  1980年   255篇
  1979年   349篇
  1978年   231篇
  1977年   198篇
  1976年   188篇
  1975年   155篇
  1974年   200篇
  1973年   175篇
  1972年   171篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
Although there has been speculation regarding the pervasiveness and nature of judicial decisions regarding life-sustaining medical treatment (LSMT), no attempt has been made to empirically assess their prevalence or the issues they address. An exploratory study utilizing a mail survey of a nationwide random sample (N = 905) of state trial court judges was conducted to provide initial information regarding this decision-making process. Twenty-two percent of the responding judges had heard at least one LSMT case, and judicial review did not appear endemic to particular states. The number of judges hearing LSMT cases dropped from 1975 to 1981 but has increased since then. Three major issues predominate: patient competency, appointment of a surrogate decisionmaker, and resolution of the ultimate issue of forgoing LSMT. Relatively few cases either contested a prior directive's validity or involved imposing sanctions for instituting or forgoing LSMT. Although subject to different interpretations, the results suggest the courts are having a significant impact on certain aspects of the LSMT decision-making process. However, the infrequency with which any one judge is called upon to make an LSMT decision causes concern about the judiciary's ability to respond in a timely and appropriate manner. With their potential for a profound effect on the actions of health care providers, greater attention to this decision-making process is warranted.  相似文献   
62.
63.
64.
65.
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   
66.
67.
68.
69.
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   
70.
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   
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