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   3524篇
  免费   605篇
各国政治   542篇
工人农民   115篇
世界政治   403篇
外交国际关系   254篇
法律   1465篇
中国政治   57篇
政治理论   1238篇
综合类   55篇
  2023年   10篇
  2022年   6篇
  2021年   45篇
  2020年   69篇
  2019年   215篇
  2018年   146篇
  2017年   213篇
  2016年   247篇
  2015年   190篇
  2014年   192篇
  2013年   868篇
  2012年   148篇
  2011年   144篇
  2010年   164篇
  2009年   108篇
  2008年   135篇
  2007年   116篇
  2006年   114篇
  2005年   90篇
  2004年   81篇
  2003年   86篇
  2002年   84篇
  2001年   40篇
  2000年   64篇
  1999年   45篇
  1998年   58篇
  1997年   41篇
  1996年   45篇
  1995年   43篇
  1994年   34篇
  1993年   29篇
  1992年   28篇
  1991年   12篇
  1990年   28篇
  1989年   10篇
  1988年   30篇
  1987年   18篇
  1986年   11篇
  1985年   7篇
  1984年   16篇
  1983年   13篇
  1982年   9篇
  1981年   13篇
  1980年   11篇
  1979年   13篇
  1978年   8篇
  1977年   11篇
  1975年   3篇
  1974年   4篇
  1970年   3篇
排序方式: 共有4129条查询结果,搜索用时 15 毫秒
1.
Fatal fall from a height initiated with a swinging motion on the sagittal plane of the victim's body is examined. Method of analytical mechanics is adopted to establish the functional relations between the swinging angle of the body and the force needed to sustain the body until release, and the amount of the horizontal displacement that would occur after release. The analysis is applied to support an expert opinion presented in a criminal court in which two accused were convicted of murder for dropping a female victim from a bridge. The results indicate that it is unlikely for the body to locate as recorded by the police investigation report in the case. This study demonstrates that a straightforward mechanical analysis can be utilized to examine uncommon falling scenarios.  相似文献   
2.
One important aspect of the economic theory of criminal court delay is to understand how the prosecutor and the defendant make their decisions, and how these respond to changes in trial delay. If both parties jointly maximise expected utility, trial delay may increase or decrease the number of trials, depending upon the decision makers' attitudes towards risk. The main policy implication is that providing the criminal courts with more resources in the form of additional judges and court capacity may lengthen the trial queue rather than shorten it. This is a counterintuitive result contrary to popular belief.  相似文献   
3.
4.
5.
6.
7.
The ECJ reiterates its support for the comparative advertiserby indicating that common sense is needed to comply with theMisleading Advertising and Comparative Advertising Directive(Directive 97/55).  相似文献   
8.
Past research has largely ignored the developmental changes within the child that account for the association between parenting and risk for delinquency. We used structural equation modeling and data from a longitudinal study of several hundred African‐American families to test the contentions of various theories regarding the sociocognitive and emotional factors that mediate the impact of parental behavior on a youth's risk for delinquency. Our findings largely supported the theories. The impact of monitoring/discipline was indirect through low self‐control and acceptance of deviant norms, whereas the effect of hostility/ rejection was indirect through low self‐control, hostile view of relationships, and acceptance of deviant norms. These two dimensions of parenting were no longer related either to affiliation with deviant peers or to conduct problems once the effects of these psychological characteristics were taken into account; the impact of these parenting practices was completely mediated by these four cognitive/affective variables. Contrary to expectation, however, these psychological factors did not mediate any of the relationship between caretaker involvement in antisocial behavior and child conduct problems.  相似文献   
9.
The concern driving current debate on agricultural extension is increasingly that of how to help farmers learn how to deal with the complex world around them responsibly and profitably, in such a way that the extension worker is ancillary. This article seeks to deconstruct and provide a more reasoned assessment of agricultural extension services through a reflection on development paradigms, adult education, individual empowerment, and institutional pluralism. By calling into question the underlying ethical dimensions of agricultural extension, it is possible to develop an alternative paradigm and thereby generate new insights into it. The article concludes that the raison d'être of agricultural extension today must be to create an ethical basis which ensures that extension practices are more inclusive and thus responsive to the needs of farmers and other rural populations, integrating individual expectations into the wider socio-economic, cultural, political, and geographical environment.  相似文献   
10.
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