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   1272篇
  免费   82篇
各国政治   112篇
工人农民   62篇
世界政治   187篇
外交国际关系   91篇
法律   674篇
中国政治   9篇
政治理论   219篇
  2023年   18篇
  2022年   13篇
  2021年   29篇
  2020年   50篇
  2019年   54篇
  2018年   78篇
  2017年   72篇
  2016年   64篇
  2015年   43篇
  2014年   67篇
  2013年   215篇
  2012年   54篇
  2011年   45篇
  2010年   33篇
  2009年   26篇
  2008年   39篇
  2007年   43篇
  2006年   46篇
  2005年   38篇
  2004年   39篇
  2003年   37篇
  2002年   23篇
  2001年   26篇
  2000年   39篇
  1999年   12篇
  1998年   8篇
  1997年   9篇
  1996年   4篇
  1995年   7篇
  1994年   10篇
  1993年   8篇
  1992年   9篇
  1991年   8篇
  1990年   5篇
  1989年   4篇
  1988年   7篇
  1987年   8篇
  1986年   5篇
  1985年   3篇
  1983年   2篇
  1982年   4篇
  1980年   4篇
  1979年   6篇
  1978年   6篇
  1977年   2篇
  1973年   8篇
  1972年   2篇
  1971年   7篇
  1965年   5篇
  1963年   2篇
排序方式: 共有1354条查询结果,搜索用时 15 毫秒
51.
DNA is one of the fastest growing tools in forensic sciences, increasing reliability in forensic reports and judgments. The use of DNA has increased in different areas of the forensic sciences, such as investigation of plant species, where plastid DNA has been used to elucidate and generate evidence in cases of traceability of genetically modified and controlled plants. Even with several advances and the practice of using DNA in forensic investigations, there are just few studies related to the identification of genetic tools for the characterization of drug and nondrug-types of Cannabis. Herein, the whole plastomes of two drug-type Cannabis are presented and have their structures compared with other Cannabis plastomes deposited in the GenBank, focusing in the forensic use of plastome sequences. The plastomes of Cannabis sativa “Brazuka” and of the hybrid Cannabis AK Royal Automatic presented general structure that does not differs from the reported for other C. sativa cultivars. A phylogenomic analyses grouped C. sativa “Brazuka” with the nondrug C. sativa cultivars, while the hybrid Cannabis AK Royal Automatic placed isolated, basal to this group. This suggests that the analysis of plastomes is useful toward genetic identification of hybrids in relation to C. sativa.  相似文献   
52.

The aim of this paper is to examine the influence of the right to information laws on sustainability transparency in European local governments. This goal is novel, in that previous studies have examined the effects of various factors on the dissemination of government information (demographic, socioeconomic, political and financial) but not the contribution of legal factors to online transparency on environmental, social and economic sustainability. Our research question is this: Do information laws contribute to transparency on sustainability? Using the Global Reporting Initiative guidelines and a statistical regression analysis, we studied the websites of 106 local governments in ten European countries. The results obtained show that when transparency laws clearly stipulate the rules applicable and the procedures established for appeals, exceptions, refusals and requests, this can favour transparency on environmental, social and economic sustainability. Our findings advance understanding of this field and reinforce the basis for legal reforms to enhance sustainability transparency.

  相似文献   
53.
This article argues that Donald Trump’s Asian strategy hardly marks a radical transformation from Barack Obama’s ‘pivot to Asia’. This is because the ‘pivot to Asia’ never really existed. Although Obama was successful in building legitimacy for the strategy through international norms, he failed to translate his lofty rhetoric into practice. Much of his original pivot components (building a constructive relationship with China, coordinating with Asian allies and multilateralism in the Association of South East Asian Nations and the Trans-Pacific Partnership) has either failed or did not live up to expectations. Donald Trump was adamant that the Asian pivot was a bad strategy and that he would not follow it. But although he completely discarded Obama’s legitimization of the rebalance (as Trump speaks pragmatically and does not care about international norms), in actuality he has followed many of Obama’s policies, and even improved on some of them. That being said, Trump’s ‘pivot actions’ appear to be erratic, pragmatic short-term actions rather than a meticulously planned long-term strategy similar to Obama’s rebalance (which did not materialize). Thus, while Obama failed to transform the pivot into an effective strategy, neither is Trump’s effectiveness backed by a coherent Asian strategy.  相似文献   
54.
Journal of Youth and Adolescence - Chronotype, or morningness/eveningness, has been associated with adjustment in both children and adolescents. Specifically, eveningness has been linked to...  相似文献   
55.
56.
This paper aims to analyse whether illegal (corruption) and legal rent extraction (high politicians’ wages) affect electoral outcomes at municipal level. We use an initial sample of 145 Spanish municipalities over 50,000 for two electoral periods: 2004–2007 (before the crisis) and 2008–2011 (during the crisis). Our findings show that neither illegal nor legal rent extraction impact on re-election in non-crisis times. However, we observe that citizens penalize legal rent extraction in the ballots during the crisis. Regarding the economic performance of the local governments, we find that its effect on re-election is important in non-crisis period. Nevertheless, in time of crisis, given that the economic situation is bad in general in the country, voters pay less attention to economic factors and focus on politicians’ behaviour.  相似文献   
57.
In recent years, Spanish local governments have come under increasing pressure to accommodate severe economic restrictions while maintaining their provision of local public services. We analyse overall cost efficiency in Spanish local governments during the period of the economic crisis (2008–2013), under four different non-parametric methodologies. Moreover, given how problematic it is to precisely define what municipalities do, we compare three different output models with various measures of quantity as well as quality. Results suggest that Spanish local government efficiency improved over the period 2008–2013 since budget expenditures (inputs) fell while local public services and facilities (outputs) were maintained. We also find evidence of the possible implications of service quality when measuring municipalities’ efficiency, and of structural differences in the average efficiency between municipalities located in different Spanish regions. Finally, our results confirm that the level and variation of efficiency scores are affected by the approach taken.  相似文献   
58.
In Europe, it is relatively uncommon to find studies that investigate the criminal profiles of violent offenders, especially infrequent are those that pay special attention to offenders’ mental health/substance use disorders and histories of violence during childhood. The current research explores whether inmates who are incarcerated for violent offenses (n = 536) in Spain are different in terms of the aforementioned factors as compared to inmates incarcerated for non-violent offenses (n = 536). Multivariate logistic regression analysis revealed that violent offenders, as compared to their non-violent counterparts, were more likely to be younger, younger at the time of their first arrest, single, use alcohol, receive treatment in prison for anxiety or schizophrenia, and report physical abuse during childhood.  相似文献   
59.
60.
On the Move     
正Moving house is traumatic at the best of times.I recently decided to look for a new apartment on the eastern side of Beijing and seek greener pastures compared with my present abode in the back of beyond.Previously,colleagues had always helped me to hunt down that elusive place to hang my hat.With little time at my disposal to physically hunt down apartments on my own,I searched for that most persuasive of  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