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   11669篇
  免费   1186篇
各国政治   408篇
工人农民   376篇
世界政治   839篇
外交国际关系   282篇
法律   8989篇
中国共产党   1篇
中国政治   82篇
政治理论   1805篇
综合类   73篇
  2020年   338篇
  2019年   339篇
  2018年   385篇
  2017年   446篇
  2016年   460篇
  2015年   427篇
  2014年   417篇
  2013年   1165篇
  2012年   268篇
  2011年   358篇
  2010年   531篇
  2009年   484篇
  2008年   275篇
  2007年   246篇
  2006年   355篇
  2005年   239篇
  2004年   228篇
  2003年   223篇
  2002年   201篇
  2001年   439篇
  2000年   345篇
  1999年   296篇
  1998年   143篇
  1997年   128篇
  1996年   103篇
  1995年   131篇
  1994年   141篇
  1993年   115篇
  1992年   216篇
  1991年   235篇
  1990年   217篇
  1989年   230篇
  1988年   208篇
  1987年   178篇
  1986年   207篇
  1985年   225篇
  1984年   220篇
  1983年   185篇
  1982年   147篇
  1981年   131篇
  1980年   129篇
  1979年   150篇
  1978年   92篇
  1977年   79篇
  1976年   67篇
  1975年   71篇
  1974年   77篇
  1973年   64篇
  1972年   55篇
  1971年   56篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
251.
ABSTRACT

Assessing the risk for animal cruelty is imperative, yet understudied and problematic due to the sensitivity of the topic. Early prevention is critical, yet very little research examines cruelty when it first appears in childhood. The aim of this study was to explore children’s attitudes towards types of animal cruelty, to investigate potential demographic differences, and to examine potential associations between acceptance of cruelty and cognitive and affective factors that place children ‘at-risk’ for cruelty perpetration. Questionnaire data was collected from 1127 children in schools. The results indicate that cruelty attitudes are predicted by some demographic variables such as urban living, being male, younger age and not having pets, but depend on the type of animal cruelty. Acceptance of cruelty predicted low compassion and low reported humane behaviour towards animals. Acceptance of cruelty was predicted by negative attitudes towards animals, lower beliefs in animal minds and low attachment to pets, signifying the importance of targeting such variables in future prevention programmes. This study is an original contribution to research into childhood animal cruelty in the general population, with implications for designing and implementing early prevention programmes that tackle problematic attitudes to cruelty.  相似文献   
252.
High‐throughput sequencing (HTS) of large panels of single nucleotide polymorphisms (SNPs) provides an alternative or complimentary approach to short tandem repeats (STRs) panels for the analysis of complex DNA mixture forensic samples. For STRs, methods to estimate individual contribution concentrations compare capillary electrophoresis peak heights, peak areas, or HTS allele read counts within a mixture. This article introduces three approaches (mean, median, and slope methods) for estimating individual DNA contributions to forensic mixtures for HTS/massively parallel sequencing (MPS) SNP panels. For SNPs, the major:minor allele ratios or counts, unique to each contributor, were compared to estimate contributor proportion within the mixture using the mean, median, and slope intercept for these alleles. The estimates for these three methods were typically within 5% of planned experimental contributions for defined mixtures.  相似文献   
253.
Fluoxetine is a selective serotonin reuptake inhibitor, commonly used for the treatment of a variety of psychopathological conditions. As such, fluoxetine may be expected to appear in clinical and forensic cases. Dermestes maculatus De Geer (Coleoptera: Dermestidae) has been recognized as a relevant component of the insect fauna associated with decomposing human and animal remains. Experiments were conducted to study the effect of fluoxetine on developing D. maculatus using two‐drug administration models: a non‐living animal model (pork muscle) and a living one (Sus scrofa L. pigs). We assessed the duration of immature stages and total life cycle, as well as morphological parameters (body length, cephalic width, and weight). The effect of fluoxetine was studied at an overdose concentration: In the non‐living animal model the drug was mixed with macerated pork muscle (2000 mg/kg) and in the living animal model, pigs were given the drug orally (833 mg/kg). A control was used for each model. Daily observations were performed from the beginning to the end of the experiments. GC‐MS was used for drug detection and quantification. There were no statistically significant differences in the duration of immature stages, life cycle, larval mortality, morphological parameters, or sex ratio, between treatment and control, regardless of the drug administration model. Given that fluoxetine had no detectable effect on the development of D. maculatus, detection of this drug in forensic situations would not compromise the accuracy of PMI estimations.  相似文献   
254.
255.
This article investigates political opportunities and constraints associated with incorporating the concept of universal citizenship into migration debates. Analyzing the speeches of Ecuador's president Rafael Correa over eight years, the article argues that Correa strategically crafted a narrative of universal citizenship to undergird politically beneficial policies. Political constraints from constituents and rivals, and the populist nature of his governing style, hollowed out progressive migration policy innovations to the point that universal citizenship became a rhetorical device more than a substantive policy agenda. Through this empirical case, the article develops a more nuanced critical understanding of universal citizenship discourses as sites for negotiating the relationship between states and migrants.  相似文献   
256.
Public sector reform in both Latin American and Caribbean countries has become a high priority for governments in their search for a new role for the state. Common principles have included the objective to privatize, or contract out services or responsibilities where the private sector has a comparative advantage while at the same time improving government efficiency in areas that are considered core government functions at different levels of government. These include integrated government financial management, social security and social safety nets, tax administration, provision of basic services (education and health), legal/regulatory reform, and judicial enforcement. Guiding principles in all countries have been predictability, transparency and accountability. While the degree of reform has varied amongst countries, there are a number of distinguishing features of the Commonwealth Caribbean that set its public sector reform experience apart from that of Latin America. These include the legacy of a professional civil service, long-standing democratic institutions and an active civil society, the relatively small size of the countries, and the emphasis on rule of law that can help explain some of the differences in the reform paths taken. Nevertheless, government ownership and commitment to public sector reform has been shown to be the most important element in determining results within the Latin American and Caribbean region.  相似文献   
257.
Journal of Youth and Adolescence - Adolescents are spending considerable time on social media, yet it is unclear whether motivations for social media use drive different forms of social media...  相似文献   
258.
This article explores the role of Queensland voters in the 2019 Australian federal election. The article identifies five key elements of a Queensland political culture before offering evidence that the Liberal-National Coalition's exceedingly strong performance in Queensland in 2019 was not a single aberration, but one of a long and continuing pattern of electoral nonconformity. The article also argues Queensland's complex regional diversity necessitates analysis across not one or two constituencies but via six geographically, economically and demographically diverse regions. Third, the article argues the unexpectedly large swing against the Australian Labor Party in Queensland in 2019 was fuelled, overwhelmingly, by five factors, each consistent with the five core elements of a Queensland political culture.  相似文献   
259.
Williams  Paul D. 《African affairs》2007,106(423):253-279
This article employs the concepts of security culture and normlocalization to explore some of the cultural dimensions of theAfrican Union's (AU) security policies. After providing an overviewof constructivist accounts of norm socialization in internationalrelations, I use these insights to analyse the origins and developmentof the AU's security culture. The final two sections explorethe ongoing process of norm localization in relation to thetwo most recent tenets of the AU's security culture: intoleranceof unconstitutional changes of government and the responsibilityto protect principle. An awareness of the uneven and contestednature of this process helps account for the fact that althoughthese two transnational norms have been institutionalized inthe AU Charter and endorsed by the United Nations, they havebeen internalized unevenly by the AU's member states. Externaladvocates of these two norms would thus do well to help thecontinent's norm entrepreneurs build congruence between thesenorms and the AU's security culture.  相似文献   
260.
Cooper  Allan D. 《African affairs》2007,106(422):113-126
The Herero were the first ethnic group to be subjected to genocidein the twentieth century. In 2001, the Herero became the firstethnic group to seek reparations for colonial policies thatfit the definition of genocide. The Herero are the latest plaintiffto use the procedures of the Alien Torts Claim Act of 1789 toseek reparations in a US federal court for war crimes committedoverseas. This article analyzes the legal arguments by Hererosagainst Germany within the context of current understandingsof international law and identifies the challenges that lieahead for this claim. The article also explores the implicationsof the Herero claim for other ethnic groups victimized by colonization.  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