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   26808篇
  免费   1441篇
各国政治   1157篇
工人农民   1144篇
世界政治   1833篇
外交国际关系   845篇
法律   17727篇
中国共产党   3篇
中国政治   167篇
政治理论   5198篇
综合类   175篇
  2021年   127篇
  2020年   505篇
  2019年   570篇
  2018年   731篇
  2017年   772篇
  2016年   846篇
  2015年   651篇
  2014年   704篇
  2013年   2726篇
  2012年   671篇
  2011年   744篇
  2010年   715篇
  2009年   755篇
  2008年   747篇
  2007年   741篇
  2006年   768篇
  2005年   672篇
  2004年   647篇
  2003年   583篇
  2002年   633篇
  2001年   1004篇
  2000年   898篇
  1999年   712篇
  1998年   396篇
  1997年   294篇
  1996年   321篇
  1995年   309篇
  1994年   304篇
  1993年   309篇
  1992年   497篇
  1991年   520篇
  1990年   493篇
  1989年   498篇
  1988年   509篇
  1987年   457篇
  1986年   545篇
  1985年   538篇
  1984年   444篇
  1983年   414篇
  1982年   306篇
  1981年   273篇
  1980年   241篇
  1979年   345篇
  1978年   197篇
  1977年   193篇
  1976年   164篇
  1975年   161篇
  1974年   203篇
  1973年   158篇
  1972年   153篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
93.
Bone fragments were stored in water for 2 years at room temperature and investigated serologically using the following methods: Absorption-elution, extraction of blood group substances and immunohistochemistry (PAP). All 3 methods gave essentially specific results for fresh bone tissue but with putrid bone tissue unspecific reactions were found predominantly with the absorption-elution and PAP techniques. In contrast, more specific reactions were obtained from the extracts although they were much weaker. From this it can be concluded that pure physical binding plays a substantial role in the unspecific reaction between antibodies and bone material. It is suggested that the relevant physical properties are altered by putrification.  相似文献   
94.
95.
This paper addresses two neglected areas in the research on the relationship between family violence and violence outside the home: violence other than parent-child abuse and the effect of gender. Specifically, we consider both parental and sibling violence as independent variables, nonfamily violence as the dependent variable, and gender as the specification variable. The data were collected from a sample of 306 students in Introductory Sociology and Social Problems classes. The finding of particular importance is that the interaction between the gender of both the aggressor and the victim has a significant effect on the relationship between violence within the home and nonfamily violence.  相似文献   
96.
This paper explores the capacity of alternative theoretical perspectives to explain the self-reported criminality of black and white young adult females. When criminal involvement is regressed on the theory operation-alizations separately by race, a key difference emerges: For white women, significant effects are clustered in the social-psychological theory groups (bonding, attitudes, and maturation), but for the black women the social-psychological variables have only scattered and inconsistent eflects. Instead, for black women structural indicators emerge as the important predictors of criminal involvement.  相似文献   
97.
98.
Comparison of a suspected biter's dental arches with the patterned injury of a bite mark is especially difficult when the bite occurs in an anatomic location with a small radius of curvature or with complex or compound curves. The authors present two case reports in which human skin was used as a template for the reproduction of a bite. In one case the victim's skin was used; in the other, the skin of a anatomically similar person was used. The use of inked dental casts, photography, and transparent overlays significantly reduced the errors common to analysis of bite marks in these highly curved areas.  相似文献   
99.
100.
Retention of offender DNA samples serves an important quality assurance role for forensic DNA laboratories. Consistent with the principles of confidentiality underlying the establishment of the state and national DNA databases, safeguards are in place to protect the DNA samples from unauthorized use.  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