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   1649篇
  免费   74篇
各国政治   93篇
工人农民   80篇
世界政治   129篇
外交国际关系   129篇
法律   848篇
中国政治   14篇
政治理论   416篇
综合类   14篇
  2023年   18篇
  2022年   18篇
  2021年   14篇
  2020年   36篇
  2019年   49篇
  2018年   53篇
  2017年   62篇
  2016年   74篇
  2015年   41篇
  2014年   61篇
  2013年   239篇
  2012年   60篇
  2011年   51篇
  2010年   47篇
  2009年   50篇
  2008年   68篇
  2007年   76篇
  2006年   56篇
  2005年   66篇
  2004年   57篇
  2003年   50篇
  2002年   53篇
  2001年   26篇
  2000年   25篇
  1999年   29篇
  1998年   29篇
  1997年   16篇
  1996年   11篇
  1995年   26篇
  1994年   16篇
  1993年   11篇
  1992年   24篇
  1991年   14篇
  1990年   12篇
  1989年   17篇
  1988年   15篇
  1987年   12篇
  1986年   12篇
  1985年   12篇
  1984年   9篇
  1983年   14篇
  1982年   9篇
  1981年   6篇
  1980年   12篇
  1979年   6篇
  1978年   6篇
  1977年   8篇
  1973年   6篇
  1972年   7篇
  1969年   5篇
排序方式: 共有1723条查询结果,搜索用时 15 毫秒
61.
62.
The pandemic of Covid-19 has exposed the veins of inequality in Latin America. With a socioeconomic disaster looming, social emergency policies seemed inevitable. Yet while governments argue over the continuity of such policies and whether the fiscal rules in place should be respected, no sustainable response has come out. This essay problematises whether the pandemic could represent a critical juncture to forge ahead with political narratives that highlight tax exemptions and privileges enjoyed by the rich. We analyse the mitigation measures adopted by Argentina, Brazil, Chile and Uruguay and their repercussions on the debate surrounding progressive tax reforms to fund social schemes.  相似文献   
63.
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   
64.
65.

Empathy, which is the ability to feel concern for and to understand others’ feelings, is thought to develop in high quality relationships with parent and peers, but also to facilitate the quality of these relationships. While a wide literature has addressed this aspect, the heterogeneity of primary studies, in which different indicators of relationship quality (e.g., support, conflict) and empathy (i.e., affective and cognitive) have been examined, makes it difficult to draw conclusive answers. Therefore, it remained ambiguous how parent–child and peer relationship quality are associated with adolescents’ empathy. In order to increase the understanding of these associations, a multilevel meta-analysis was performed, which allowed for including multiple effect sizes from each study. By a systematic literate search, 70 eligible studies were found that provided 390 effect sizes from 75 independent samples. The results showed a small positive correlation between parent–child relationship quality and empathy, and a small-to-moderate positive correlation between peer relationship quality and empathy, which was significantly stronger than the correlation with parent–child relationship quality. Hence, the meta-analytic results indicate that adolescents with higher quality relationships, especially with peers, indeed tend to show more concern for and understanding of others’ emotions than adolescents with lower quality relationships. Moreover, the moderation analyses showed stronger correlations for the positive dimension of relationship quality than for the negative dimension, and stronger correlations for composite scores of affective and cognitive empathy than for separate scores of the empathy dimensions. However, no differences in correlations were found between the affective and cognitive empathy dimension, and no moderation effects were found for gender and age. Thus, this meta-analysis demonstrates robust positive associations between parent–child and peer relationship quality and empathy in adolescence, implying that good empathic abilities may be a protective factor for experiencing poor relationships.

  相似文献   
66.
In response to ongoing plant genetic enclosures, the Open Source Seed Initiative (OSSI) is creating a ‘protected commons’ for seed. It is a project, I argue, that reflects characteristics of a growing transnational commoning movement. From the Zapatistas to seed wars, such movements draw attention to commons not simply as a resource, but as a dynamic and evolving social activity: commoning. In the US, OSSI includes 38 plant breeders, 48 seed companies and 377 crop varieties. Yet challenges remain for OSSI to gain wider legitimacy for ‘freed seed’, to build trust in a moral pledge, and to establish fair guidelines for which people and which seed can participate in making the commons. Using the metaphor of ‘beating the bounds’ – a feudal practice of contesting enclosures – I ask how OSSI defends the commons in intersecting arenas. The first way is legal, as OSSI negotiates a move from contract law toward moral economy law. Next is epistemic, as an informal breeder network revitalizes farmer knowledge, while proving more structurally able and culturally equipped to lead commoning efforts. Finally, I reflect on the nature of boundary beating itself, aided by Global South movements. Seed sovereignty perspectives suggest room for a pluriverse of commons to grow.  相似文献   
67.
Local Institutions and the Politics of Urban Growth   总被引:2,自引:0,他引:2  
This article uses a political market framework to analyze how the structure of local political institutions affects the relative political influence of development and environmental interests in the context of urban growth. Using panel data from 406 Florida cities from 1998 to 2003, the empirical analysis finds important interaction effects between the structure of city executive branch institutions and interest group variables. The economic and political forces driving urban growth do not operate identically in all cities—they vary as a function of institutional context. Institutional structure helps determine which interest groups have their preferences reflected in local land-use changes and development patterns. The resulting patterns suggest a "sustainability paradox" wherein richer, environmental interests push for the preservation of environmental amenities while at the same time accelerating the number of residential units built in a community.  相似文献   
68.
在这里要感谢我的朋友罗国祥教授,让我有机会来到武汉大学讲学。首先我想列举五个重要的人物来引出要讲的主题:亚伯拉罕,耶稣,马克思,弗洛伊德和爱因斯坦!摩西的名字也应该加进去。  相似文献   
69.
This article takes the form of a content analysis of the propaganda of Lehi ‐ the smallest and most extreme of the underground movements that fought against the British in Palestine. It suggests that the propaganda was based on a number of projective narratives, namely, stories that are not only designed to recall the past, but also to show how to behave in the present. Particular emphasis was placed on the lessons to be learnt from Jewish history in general and past examples of Jewish valor in particular. Attention was also paid, however, to other struggles for national liberation. In both cases, the struggle for legitimacy took place on two fronts ‐ the reconstruction of the past and its reenactment in the present. Only Lehi, it was argued, understood history and acted in accordance with it. And therein lay the terrorists’ claim to legitimacy. They, and they alone, are the true heirs of the past.  相似文献   
70.
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