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   13644篇
  免费   627篇
各国政治   721篇
工人农民   515篇
世界政治   873篇
外交国际关系   500篇
法律   8954篇
中国政治   71篇
政治理论   2554篇
综合类   83篇
  2020年   214篇
  2019年   242篇
  2018年   284篇
  2017年   343篇
  2016年   350篇
  2015年   287篇
  2014年   300篇
  2013年   1450篇
  2012年   287篇
  2011年   312篇
  2010年   344篇
  2009年   352篇
  2008年   320篇
  2007年   333篇
  2006年   334篇
  2005年   288篇
  2004年   302篇
  2003年   307篇
  2002年   258篇
  2001年   550篇
  2000年   459篇
  1999年   419篇
  1998年   188篇
  1997年   138篇
  1996年   134篇
  1995年   140篇
  1994年   157篇
  1993年   151篇
  1992年   263篇
  1991年   303篇
  1990年   282篇
  1989年   280篇
  1988年   257篇
  1987年   289篇
  1986年   271篇
  1985年   265篇
  1984年   224篇
  1983年   226篇
  1982年   158篇
  1981年   162篇
  1980年   118篇
  1979年   223篇
  1978年   151篇
  1977年   126篇
  1976年   104篇
  1975年   124篇
  1974年   134篇
  1973年   133篇
  1972年   99篇
  1971年   91篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
151.
Discharge of a shotgun with a shotgun casing in its muzzle as a "dust cover" produced a pattern of injuries suggestive of combined intermediate- and distant-range wounds.  相似文献   
152.
Much attention has been given of late to the erosion of the "employment-at-will" doctrine. Exceptions to this doctrine began to emerge when courts held that at-will employees could sue if their termination violated public policy. The at-will doctrine was further eroded by court rulings that a contract requiring good cause in order to terminate could be inferred from employee handbooks, company personnel policies, and circumstances of employment. As the initial flood of wrongful termination lawsuits now reaches the appellate level, some guidance on the standards employers must observe can be drawn from court decisions. The authors examine these decisions as well as the legislative reform being proposed in response to them.  相似文献   
153.
Physicians who defraud and abuse medical benefit programs provide a unique group of lawbreakers for scientific study. They could be considered to epitomize white collar criminals given their exceedingly high socioeconomic status and power as a professional group. Using official reports and documents, as well as interviews with enforcement and program personnel at both state and federal levels, this study examines the problem of physician fraud and abuse in Medicare and Medicaid. Major areas relevant to understanding this phenomenon and its control are presented and policy implications of present knowledge in the area are discussed.  相似文献   
154.
Spleen and portal lymphnode sections from 86 drug addicts submitted for medico-legal autopsy at the Institute of Forensic Medicine in Copenhagen in the year 1979 were studied together with tissue sections from 24 "normal" persons. In 70% of the drug addicts the spleen weight was more than 200 g, and in 71% portal lymphnode hyperplasia was found. Birefringent foreign material was found in spleen tissue of drug addicts in 72% and in portal lymphnode tissue in 44%. Signs of antigen stimulation in both spleen and portal lymphnode tissue evaluated by the number of germinal centre and plasma cells were found in more than 80% of the drug addicts compared with about 20% of the "normal" persons. The results were related to anamnestic information of duration of drug abuse, to the spleen weight, to the occurrence of birefringent material and to the liver changes. Examination of lysozyme and immunoglobulin containing cells using the indirect preoxidase technique was performed in a total of 72 cases of spleen tissue, 59 cases of portal lymphnode tissue from drug addicts, 24 cases of spleen tissue and 18 of portal lymphnode tissue from "normal" persons. Lysozyme, IgM and IgG containing cells were found significantly more often among drug addicts than "normal" persons. The results indicate that the splenomegalia and the portal lymphnode hyperplasia often found in drug addicts are caused by continuous antigen stimulation due to repeated injections of various antigens.  相似文献   
155.
156.
157.
158.
Studies were carried out systematically in both corpses and the hands of corpses in order to find out when " washerwoman 's skin" begins. The temperatures ranged between 10 degrees and 18 degrees C and the time of the experiments did not exceed 300 min. The initial formation of washerwoman 's skin could be observed after 20-30 min at the fingertips and after 50-60 min in the entire finger. The longest intervals observed were 100 or 150 min, respectively. These long intervals were interpreted as being exceptions from the norm, probably due to either extraordinarily heavy strips of fat on the fingers or abnormally hard skin on the hands. The course of washerwoman 's skin obviously depends on the water temperature, and afterwards it disappears rather slowly--even after a short immersion--in the open air. We will carry out additional experiments in the future.  相似文献   
159.
160.
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