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   10930篇
  免费   371篇
各国政治   359篇
工人农民   565篇
世界政治   658篇
外交国际关系   365篇
法律   6932篇
中国共产党   35篇
中国政治   130篇
政治理论   2108篇
综合类   149篇
  2021年   70篇
  2020年   165篇
  2019年   162篇
  2018年   237篇
  2017年   284篇
  2016年   309篇
  2015年   251篇
  2014年   253篇
  2013年   960篇
  2012年   267篇
  2011年   307篇
  2010年   245篇
  2009年   310篇
  2008年   376篇
  2007年   367篇
  2006年   355篇
  2005年   321篇
  2004年   325篇
  2003年   256篇
  2002年   245篇
  2001年   362篇
  2000年   340篇
  1999年   264篇
  1998年   173篇
  1997年   121篇
  1996年   147篇
  1995年   121篇
  1994年   138篇
  1993年   134篇
  1992年   204篇
  1991年   255篇
  1990年   217篇
  1989年   201篇
  1988年   226篇
  1987年   206篇
  1986年   225篇
  1985年   197篇
  1984年   169篇
  1983年   166篇
  1982年   103篇
  1981年   125篇
  1980年   103篇
  1979年   105篇
  1978年   91篇
  1977年   78篇
  1976年   66篇
  1975年   65篇
  1974年   67篇
  1973年   78篇
  1971年   53篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
This decision of the Regional High Court of Düsseldorfhighlights the strict rules applicable to the rights ownersburden of proof under section 71 Urheberrechtsgesetz (GermanAuthors' Act).  相似文献   
32.
The results of additional validation studies of a sensitive microplate hemagglutination assay for ABO reverse grouping of bloodstains are presented. The results of the validation study demonstrate the reliability of the microplate assay for use in routine serological casework. Based on these studies, the microplate assay has now replaced the Lattes crust test for ABO reverse grouping of bloodstains in the FBI Laboratory.  相似文献   
33.
Attributions of blame for the first and latest episodes of violence were assessed in a sample of 139 couples who were referred to a mandatory domestic violence treatment program in the military. Use of a methodology which allows for reports of nonmutually exclusive categories of attribution from both members of the dyad revealed more complex patterns of attributions than reflected in the existing literature. In addition, there were low rates of agreement within couples as to who was to blame for the violence. Although both men and women exhibited a high frequency of blaming their partner for both episodes of violence, men were significantly more likely to blame themselves for the latest than for the first episode. Attributions of blame were related to contextual variables in both men and women. Sex specific relationships emerged. These results were discussed with specific reference to predictions derived from attribution theory and their clinical implications.  相似文献   
34.
35.
36.
37.
Correlation between plasma and bone marrow tricyclic antidepressants has not been studied before. Two groups of rabbits were given 10 and 20 mg of desipramine/kg body weight, respectively. Desipramine was administered to the animals once daily by mouth for 5 days. On the fifth day the animals were sacrificed and blood and bone marrow samples were collected and analyzed using a high performance liquid chromatographic (HPLC) method. Data showed that a correlation exists between bone marrow and blood desipramine. The bone marrow desipramine concentration increased as its blood levels increased. The average ratio of bone marrow to blood desipramine +/- S.D. (standard deviation) in both dosage groups was 37.2 +/- 4.46 with a range of 30.99-44.82. This investigation is promising and shows that bone marrow could be used as an alternative tissue in the absence of a suitable blood sample.  相似文献   
38.
The formation of adequate mental health systems within prisons has accelerated as a result of successful class action lawsuits. Our recent national survey questioned all state correctional departments about the existence of standards in each system, compliance with such standards, prevalence of class action lawsuits involving the issue of providing adequate mental health services for inmates, issues related to consent decrees, available mental health resources within the correctional system, and the administrative structure of the mental health system. Our purpose was to identify those factors correlated with certified class action lawsuits involving issues related to mental health services. Twenty-one states were involved in such litigation. Only the presence of psychiatric hospitals operated by the department of corrections correlated with the presence of certified class action lawsuits involving mental health services. Prison systems larger than 15,000 inmates were at higher risk for such litigation. Smaller systems having psychiatric hospitals run by the state mental health agency appeared to be at less risk for such litigation.  相似文献   
39.
40.
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