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   70962篇
  免费   3393篇
各国政治   4769篇
工人农民   2926篇
世界政治   6382篇
外交国际关系   4063篇
法律   32830篇
中国共产党   11篇
中国政治   792篇
政治理论   21603篇
综合类   979篇
  2023年   377篇
  2021年   440篇
  2020年   1215篇
  2019年   1594篇
  2018年   1764篇
  2017年   2059篇
  2016年   2290篇
  2015年   1877篇
  2014年   2167篇
  2013年   11076篇
  2012年   1698篇
  2011年   1814篇
  2010年   1905篇
  2009年   2154篇
  2008年   1822篇
  2007年   1839篇
  2006年   1965篇
  2005年   1915篇
  2004年   1801篇
  2003年   1618篇
  2002年   1641篇
  2001年   1608篇
  2000年   1410篇
  1999年   1287篇
  1998年   1154篇
  1997年   1016篇
  1996年   997篇
  1995年   962篇
  1994年   952篇
  1993年   963篇
  1992年   980篇
  1991年   997篇
  1990年   935篇
  1989年   967篇
  1988年   966篇
  1987年   1005篇
  1986年   972篇
  1985年   1038篇
  1984年   929篇
  1983年   999篇
  1982年   890篇
  1981年   844篇
  1980年   666篇
  1979年   687篇
  1978年   604篇
  1977年   533篇
  1976年   496篇
  1975年   410篇
  1974年   401篇
  1973年   414篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
141.
This article explores the influence that state finance has had on the Romanian party system by examining the entry and exit of parties throughout the period of 1990 – 2004 and focusing on the number of parties that gained representation in the parliament as well as the party incumbency rate. I find that state finance has had a limited influence on the party system as a whole but has been influential for specific parties. I argue that the influence of state finance partly depends on when the system was introduced. In developing party systems, the influence of state finance on individual parties is more differential.  相似文献   
142.
本文介绍了最近20年来国内外有关生物检材中百草枯的提取、净化及定性定量分析检测方法的研究进展,从而为进一步研究百草枯中毒的分析检验方法提供参考。  相似文献   
143.
144.
Having found that a deep hyperlink on Davis' website to livestreaming of a motorcycle race owned by Live Nation constitutescopying, the court granted Live Nation's Motion for summaryjudgment in its copyright infringement claim and enjoined Davisfrom maintaining the link.  相似文献   
145.
146.
In this commentary, the call for clinical humility and judicial vigilance in custody recommendations is confirmed as valid and the Australian experience, where the child custody report writer has for some years been permitted to express an opinion on the ultimate issue, is considered. The inherent risks are briefly discussed, and the question of who of the judge and the social scientist might be better placed to decide the exquisitely difficult children's issues after family breakdown is touched upon. It suggests that a combination of the expert's opinion and judicial fact finding probably produces a result that is as good as it gets. But a greater danger is highlighted. It is the impact of the adversary system, and whether it is suitable in any event to these sensitive court decisions.  相似文献   
147.
The economics of the Holocaust is a many‐facetted subject that is an integral part of the Holocaust's history. This paper describes some of the results of the new research since 1990 and discusses the economic rationalities employed by the perpetrators in despoiling the Jews. Economic considerations accompanied the timing and pace of the expropriation of Jewish assets and their “Aryanization.” The new research also shows that there was widespread collaboration in the expropriation of the Jews by private interests both inside Germany and in German‐controlled Europe and that networks of bureaucrats and private interests joined to achieve Nazi goals. The combination of expropriation and mass murder was one of the aspects of the Holocaust that made it unique.  相似文献   
148.
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   
149.
150.
Von naturschutzfachlicher Seite wird seit einiger Zeit die Forderung erhoben, dass für Begrünungsmaßnahmen nur noch autochthones Saat- und Pflanzgut eingesetzt werden sollte, weil die Verwendung von Saat- und Pflanzgut aus gebietsfremden Herkünften Risiken für die Erhaltung der genetischen Vielfalt bergen könnte. Der folgende Beitrag zeichnet die Diskussion nach und befasst sich mit den rechtlichen Regelungen zum Schutz der genetischen Vielfalt, insbesondere mit den Anforderungen an die Länder, die sich aus § 41 Abs. 2 Bundesnaturschutzgesetz (BNatSchG) ergeben. * Für wertvolle Anregungen und Kritik danke ich Herrn Dr. Herwig Unnerstall und Herrn Prof. Dr. Wolfgang Köck.  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