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   26713篇
  免费   554篇
各国政治   1070篇
工人农民   1651篇
世界政治   1719篇
外交国际关系   923篇
法律   15827篇
中国共产党   2篇
中国政治   104篇
政治理论   5783篇
综合类   188篇
  2020年   252篇
  2019年   291篇
  2018年   1585篇
  2017年   1574篇
  2016年   1433篇
  2015年   376篇
  2014年   383篇
  2013年   1937篇
  2012年   622篇
  2011年   1338篇
  2010年   1319篇
  2009年   960篇
  2008年   1176篇
  2007年   1155篇
  2006年   490篇
  2005年   504篇
  2004年   618篇
  2003年   608篇
  2002年   447篇
  2001年   739篇
  2000年   669篇
  1999年   555篇
  1998年   320篇
  1997年   266篇
  1996年   239篇
  1995年   248篇
  1994年   284篇
  1993年   232篇
  1992年   369篇
  1991年   401篇
  1990年   364篇
  1989年   378篇
  1988年   357篇
  1987年   359篇
  1986年   380篇
  1985年   357篇
  1984年   317篇
  1983年   344篇
  1982年   269篇
  1981年   262篇
  1980年   192篇
  1979年   270篇
  1978年   195篇
  1977年   170篇
  1976年   143篇
  1975年   131篇
  1974年   145篇
  1973年   128篇
  1972年   125篇
  1971年   113篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
North American research on the policing of ‘domestic violence’ has been very influential among policy makers in Great Britain. In particular, research which purports to verify the deterrence value of arrest has prompted the establishment of over thirty domestic violence units in London and similar initiatives elsewhere in Britain. The paper will outline the nature of the traditional police response to ‘family violence’ in London and the nature of the experimental innovations. Changes in police practice with regard to this type of violence will be put in the context of the organizational constraints and possibilities of policing. Finally, changing police responses to domestic violence will be evaluated in terms of the debate over the possibility of using the state or its organs to achieve social change.  相似文献   
73.
74.
In recent years, legislators in all fifty states have given grandparents rights to petition for visitation privileges with grandchildren that can be enforced over parental objections. Grandparent visitation rights reflect an effort to protect meaningful relationships children enjoy with nonparental caregivers, enlist the assistance of extended family when the child's nuclear family is disrupted, and defend the interests of grandparents themselves. This psycholegal analysis explores the direct and indirect consequences of grandparent visitation statutes for family functioning. Statutory provisions are summarized, and the effects of these statutes are evaluated in light of what is known about the role of grandparents in child development, how courts evaluate children's "best interests" in grandparent visitation disputes, and how these statutes can alter family functioning in informal ways. The authors conclude that there are risks as well as benefits to children and families in grandparent visitation statutes, and suggest directions for procedural and statutory reform.  相似文献   
75.
A simple and sensitive method is described for quantitative analysis of chlorpromazine in blood, serum, urine and tissue homogenate. The chlorpromazine cation radical produced by adding perchloric acid and 2,3-dichloro-5,6-dicyano-p-benzoquinone to the sample can be detected by the ESR method at room temperature. The sensitivity limit is 10 ng, that is, 20 μl of the solution containing 0.5 μg chlorpromazine/ml. The time needed for the measurement is within 10 min. The chlorpromazine radical thus produced is very stable; for example, 95% of the radical was observed after 24 h. The advantage of this method is discussed by comparing with the ordinary spectrophotometry which requires the purification of the sample.  相似文献   
76.
77.
78.
79.
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   
80.
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