全文获取类型
收费全文 | 6161篇 |
免费 | 280篇 |
专业分类
各国政治 | 415篇 |
工人农民 | 228篇 |
世界政治 | 656篇 |
外交国际关系 | 467篇 |
法律 | 2709篇 |
中国政治 | 56篇 |
政治理论 | 1841篇 |
综合类 | 69篇 |
出版年
2023年 | 42篇 |
2022年 | 21篇 |
2021年 | 48篇 |
2020年 | 103篇 |
2019年 | 143篇 |
2018年 | 221篇 |
2017年 | 217篇 |
2016年 | 278篇 |
2015年 | 159篇 |
2014年 | 172篇 |
2013年 | 1037篇 |
2012年 | 201篇 |
2011年 | 188篇 |
2010年 | 165篇 |
2009年 | 168篇 |
2008年 | 228篇 |
2007年 | 263篇 |
2006年 | 236篇 |
2005年 | 208篇 |
2004年 | 208篇 |
2003年 | 182篇 |
2002年 | 181篇 |
2001年 | 120篇 |
2000年 | 109篇 |
1999年 | 124篇 |
1998年 | 91篇 |
1997年 | 93篇 |
1996年 | 79篇 |
1995年 | 72篇 |
1994年 | 81篇 |
1993年 | 88篇 |
1992年 | 77篇 |
1991年 | 76篇 |
1990年 | 69篇 |
1989年 | 64篇 |
1988年 | 68篇 |
1987年 | 46篇 |
1986年 | 63篇 |
1985年 | 45篇 |
1984年 | 53篇 |
1983年 | 38篇 |
1982年 | 37篇 |
1981年 | 35篇 |
1980年 | 23篇 |
1979年 | 28篇 |
1978年 | 27篇 |
1977年 | 20篇 |
1976年 | 17篇 |
1975年 | 16篇 |
1974年 | 31篇 |
排序方式: 共有6441条查询结果,搜索用时 15 毫秒
191.
192.
Michael Ellman 《欧亚研究》2007,59(4):663-693
This article contributes to the debate about the role of Stalin in the Soviet famine of 1932 – 33. It provides data on Stalin's statements and actions in 1932 – 33, judicial and extra-judicial repression, and the process by which the 1933 deportation targets were drastically reduced. It is suggested that starvation was a cheap substitute for the cancelled deportations. It is argued that in 1932 – 33 Stalin pursued a multi-pronged policy of state terror against the population of the USSR. Some general issues of interpretation are also considered, such as Bolshevik perceptions, the characterisation of Soviet industrialisation, and approaches to Soviet history. Extensive attention is given to the classification of Stalin's actions according to national and international criminal law. In particular, the question of whether or not in 1932 – 33 the Ukrainian people were victims of genocide, is analysed.
Attentively studying the author's text, not only do [specialists] not stint their compliments, but they also make some critical remarks. Because (is it necessary to prove the obvious?) any really good book invites discussion (Ivanov 2006, p. 120). The Stalinist leadership was only able to retain power then [in 1932] by using the most savage repression (Khlevnyuk 1992, p. 11). 相似文献
193.
194.
In September 2019, the U.K. House of Commons Environmental Audit Committee warned that the United Kingdom's food supply was vulnerable to climate change. Within the U.K. food retailing is highly concentrated with the four leading food retailers accounting for almost 70% of all food sales. In the face of the threat of climate change to food supplies, a focus on resilience might be seen to have much to offer retailers. However, little work has been published in the academic literature on if, and how, retailers are employing the concept of resilience in their business plans. With these thoughts in mind, this commentary paper provides an exploratory review of how the United Kingdom's four leading food retailers, namely Tesco, Sainsbury's, Asda, and Morrisons, have publicly acknowledged the importance of resilience in the face of climate change. The paper outlines definitions of resilience and retail resilience, draws out four general themes within the U.K. food retailers' resilience plans, and offers some wider reflections on the retailers' resilience plans in the face of climate change. 相似文献
195.
As relationships between people and nature are being reassessed, not least as concerns about climate change gather increasing momentum, so a range of environmental and conservation themes are moving up public and political agendas. Rewilding, simply defined as increasing the role of natural processes within landscapes, is one such theme. This commentary paper outlines the variety of definitions and origins of the concept of rewilding, illustrates some of the elements of rewilding within Europe, and offers some general reflections on the rewilding process. The paper suggests that although many benefits have been claimed for moves to increase the role of natural processes within landscapes and environments, rewilding faces several challenges, in that it means different things to different people, public perceptions of rewilding can generate unease, hostility, and concern and it has only limited scientific support. At the same time, there is no clear statutory policies to guide the rewilding process. As such, rewilding organisations may increasingly look to communication and public relations to garner public and financial support for their cause. 相似文献
196.
J. Michael Angstadt 《政策研究评论》2020,37(2):244-259
As the emergence of nongovernmental conservation efforts generates conflict among various stakeholders, the causal story that each party articulates regarding conservation and the causes of land degradation reflects their unique interests. This study uses existing literature to evaluate causal stories surrounding a contemporary conservation effort: Montana's American Prairie Reserve. Through qualitative review of web‐based documents and newspaper articles, it generates a preliminary account of key stakeholders' causal stories. The case study suggests that parties who might be disadvantaged by ascribing responsibility for environmental harms in an adversarial fashion may instead elect to articulate causal stories that are more neutral than existing approaches might forecast. The study concludes by suggesting that further development of causal story literature may enable it to better address contemporary conservation efforts. 相似文献
197.
How large a benefit is partisan control of the redistricting process? Do legal constraints on redistricting—such as the preclearance requirement of the Voting Rights Act—alter this benefit? Are institutions designed to reduce the benefit to partisan control—such as redistricting commissions—effective? To measure the effects of partisan districting on the electoral fortunes of the parties, we collect data on the partisan composition of state government, House election outcomes, and moderating institutions over an 80-year period. Our results suggest that over time, both parties have benefited from unified control, with the effects largest in states where voters were evenly divided among the parties and smallest in states where the controlling party had a large advantage in the electorate. The effects have changed over time, with both parties having equally benefited from control during the middle of the 20th century, the benefit largely disappearing in the late part of the century, and the Republican Party seeing a moderate advantage from control in the current century. The benefits of partisan control were not diminished in states with redistricting commissions. The preclearance requirement appears to have hurt the Democratic Party except when its vote share was very low. The aggregate effects of partisan redistricting are moderate in magnitude—in the modern period, this effect has typically been less than 10 House seats, with the last election where control of the House would have flipped in expectation occurring in 1954. 相似文献
198.
Allegations of child maltreatment and neglect, including child sexual abuse, in the context of child custody disputes pose particular challenges for child protection services, family law professionals and the courts to identify children at risk of harm, as well as children impacted and exposed to other risk factors. Accurately identifying child maltreatment requires assessing the background, the history and the context of the allegations in order to differentiate confirmed, unfounded, and fabricated allegations. The paper provides a review of the history and current understanding of allegations within the context of child custody disputes by considering the connections of fabricated allegations to the theory of alienation and the role of gatekeeping. The paper then examines the social science literature regarding allegations within child protection investigations (the prevalence, types of maltreatment, reporter of allegations, and case outcomes) and explores the factors that have contributed to the challenges faced by child protection services to investigate and make determinations regarding allegations within the context of child custody disputes. We argue for early assessment protocols for child protection services to screen child custody cases, to differentiate allegations of alienation from other types of harm, to enhance role clarity in these volatile situations, to refrain from “taking sides” and to work collaboratively with the family law community. Lastly, we offer legal implications to improve collaboration between child protection services and the family law field to better respond to these complex cases. 相似文献
199.
200.
Adam Lanzarotta Ph.D. Michael D. Thatcher B.S. Lisa M. Lorenz B.S. JaCinta S. Batson M.S. 《Journal of forensic sciences》2020,65(5):1443-1449
A simple, quick, selective, sensitive, and effective field-friendly method capable of being used by nonexperts has been developed for detecting mitragynine in Mitragyna speciosa (kratom) using surface-enhanced Raman spectroscopy (SERS). Over 100 samples and blanks (known to be either positive or negative for the presence of mitragynine) were examined in duplicate using five identical handheld Raman spectrometers, which provided a data set of over 1,000 examinations. Based on the results of these analyses, the method yielded a true-positive rate of 99.3%, a true-negative rate of 97.9%, a false-positive rate of 2.1%, and a false-negative rate of 0.7%. The average minimum detectable concentration (Cm) of mitragynine that reproducibly yielded a match for one of the library spectra on all five instruments was determined to be 342 ng/mL (ppb). This Cm value is a conservative estimate considering that the extraction process was not fully optimized by this study, which was not necessary since the Cm value achieved was well below typical mitragynine concentrations in kratom (1.3–2.3%). The method is ideal (i) for prioritizing samples for additional testing using other more time-consuming laboratory-based techniques needed to detect and quantify mitragynine and (ii) for field use at international mail facility (IMF) satellite laboratories to help interdict kratom and prevent this dangerous product from reaching the U.S. supply chain. 相似文献