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   69170篇
  免费   3281篇
各国政治   4468篇
工人农民   2955篇
世界政治   6001篇
外交国际关系   3869篇
法律   32505篇
中国共产党   43篇
中国政治   799篇
政治理论   20774篇
综合类   1037篇
  2021年   407篇
  2020年   1174篇
  2019年   1525篇
  2018年   1694篇
  2017年   1987篇
  2016年   2208篇
  2015年   1851篇
  2014年   2112篇
  2013年   10566篇
  2012年   1646篇
  2011年   1754篇
  2010年   1857篇
  2009年   2110篇
  2008年   1827篇
  2007年   1815篇
  2006年   1962篇
  2005年   1858篇
  2004年   1723篇
  2003年   1498篇
  2002年   1549篇
  2001年   1528篇
  2000年   1347篇
  1999年   1201篇
  1998年   1112篇
  1997年   988篇
  1996年   957篇
  1995年   920篇
  1994年   927篇
  1993年   949篇
  1992年   960篇
  1991年   1025篇
  1990年   945篇
  1989年   984篇
  1988年   1007篇
  1987年   1002篇
  1986年   979篇
  1985年   1038篇
  1984年   939篇
  1983年   984篇
  1982年   884篇
  1981年   853篇
  1980年   657篇
  1979年   683篇
  1978年   592篇
  1977年   537篇
  1976年   488篇
  1975年   403篇
  1974年   419篇
  1973年   432篇
  1972年   364篇
排序方式: 共有10000条查询结果,搜索用时 258 毫秒
241.
This article is the result of a master's thesis about children and their universal right to be included in a family environment. This is not only protected under international law, but also intuitive to human beings. HIV‐AIDS continues to threaten lives of children, particularly in sub‐Saharan Africa in the form of orphaning. Looking at a case study from Kenya, it is revealed that, while legal protection is yet to be fully realized in the state, strong cultural norms of value are alive. Currently, the extended family system is the greatest protection to children orphaned or at risk of being orphaned. However, this system was made invisible in the domestic laws of Kenya under the Children Act 2001. This neglect calls for questions not only regarding the protection cultural norms may offer, according to the best interests of children, but also as to the cultural environment being created with the new law.  相似文献   
242.
The Rehabilitation Engineering Research Center on Technology Transfer (T2RERC) hosted a “State of the Science” conference in November, 2001. The conference reviewed technology transfer work within the field of assistive technology, and summarized related work in public, private and academic sectors. Invited speakers prepared papers on various topics concerning technology transfer, and related their findings to the field of assistive technology during the ensuing discussion sessions. This paper provides an overview of the material presented by the participants, and explores the implications of their findings for one particular field of application—assistive technology for people with disabilities.  相似文献   
243.
244.
245.
In their article, Tippins and Wittmann articulate a strong position against custody evaluators making specific custody recommendations to the court. This response will focus on my thoughts about their concepts and my belief that recommendations can be useful and appropriate some of the time, even though there may be significant problems with certain types of recommendations and problems with some evaluators.  相似文献   
246.
247.
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   
248.
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   
249.
Kornai's thesis that shortage results from demand expansions bred by the soft budget constraint, derives from his implicit assumption that price regimes of input and output firms are different. Since any firm is both an input and an output firm, which discards the assumption as logically untenable, excess demand can only turn up because of lower than contracted inputs of labor and management that are not offset by an adequate downward adjustment of earnings. Expansions of demand that appear to be autonomous, are incited by uncertain deliveries of inputs, that is, by inefficiency (of output firms) as well. A by far the largest part of excess demand can be explained by state preferences for fast growth. As planners are more successful in generating investment, and the ensuing consumer, demand than in expanding production, shortage is inevitable regardless of the character of the firms' budget constraints.  相似文献   
250.
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   
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