全文获取类型
收费全文 | 8553篇 |
免费 | 250篇 |
专业分类
各国政治 | 491篇 |
工人农民 | 389篇 |
世界政治 | 625篇 |
外交国际关系 | 362篇 |
法律 | 5006篇 |
中国政治 | 47篇 |
政治理论 | 1829篇 |
综合类 | 54篇 |
出版年
2020年 | 109篇 |
2019年 | 137篇 |
2018年 | 178篇 |
2017年 | 205篇 |
2016年 | 224篇 |
2015年 | 148篇 |
2014年 | 188篇 |
2013年 | 1006篇 |
2012年 | 180篇 |
2011年 | 205篇 |
2010年 | 183篇 |
2009年 | 185篇 |
2008年 | 221篇 |
2007年 | 252篇 |
2006年 | 235篇 |
2005年 | 188篇 |
2004年 | 180篇 |
2003年 | 193篇 |
2002年 | 169篇 |
2001年 | 311篇 |
2000年 | 253篇 |
1999年 | 239篇 |
1998年 | 115篇 |
1997年 | 96篇 |
1996年 | 89篇 |
1995年 | 80篇 |
1994年 | 93篇 |
1993年 | 84篇 |
1992年 | 133篇 |
1991年 | 174篇 |
1990年 | 164篇 |
1989年 | 156篇 |
1988年 | 166篇 |
1987年 | 178篇 |
1986年 | 173篇 |
1985年 | 157篇 |
1984年 | 153篇 |
1983年 | 128篇 |
1982年 | 95篇 |
1981年 | 108篇 |
1980年 | 76篇 |
1979年 | 130篇 |
1978年 | 94篇 |
1977年 | 78篇 |
1976年 | 58篇 |
1975年 | 85篇 |
1974年 | 90篇 |
1973年 | 84篇 |
1972年 | 56篇 |
1971年 | 57篇 |
排序方式: 共有8803条查询结果,搜索用时 203 毫秒
1.
ABSTRACTCopyright is inherently intertwined with the development of technology and none more so than the advent of the Internet and sharing technologies. More recently, social media platforms have become the latest challenge for copyright law and policy. This article builds on the literature that recognises the underlying conflict between copyright and social networking sites (SNSs); namely that the basic implication of copyright is the restriction of copying, whereas the ethos of social networking is the promotion of sharing. In particular, this article focuses on the disparity between the restricted acts of copying and communication to the public under copyright law and the encouragement of sharing on SNS Instagram. In doing so, it contextualises the debate surrounding copyright and social media and provides an understanding of the legal implications of using Instagram. As such this paper analyses (1) the infringement of copyright protected work on Instagram, and (2) the user-agreement and licensing of copyright material on Instagram. This study concludes that the disparity between the principles of copyright and social media lead to confusion and vulnerability of users. Therefore, it is suggested that Instagram should better inform its users of the implications of sharing third-party content as well as the terms of its user agreement. This could be done by implementing a copyright strategy, which includes a notice and takedown system as well as investing in producing educational content for users. Perhaps SNSs, such as Instagram might be more motivated to take steps to recognise intellectual property rights if they were considered Internet Services Provides such as YouTube. 相似文献
2.
Marloes E. M. Vester M.D. Ph.D. Kurt B. Nolte M.D. Ph.D. Gary M. Hatch M.D. Chandra Y. Gerrard M.P.H. B.S. Reinoud D. Stoel Ph.D. Rick R. van Rijn M.D. Ph.D. 《Journal of forensic sciences》2020,65(5):1568-1573
Postmortem computed tomography (PMCT) is integrated into the evaluation of decedents in several American medical examiner offices and medicolegal death investigative centers in many other countries. We retrospectively investigated the value of PMCT in a series of firearm homicide cases from a statewide centralized medical examiner’s office that occurred during 2016. Autopsies were performed or supervised by board-certified forensic pathologists who reviewed the PMCT scans prior to autopsy. PMCT scans were re-evaluated by a forensic radiologist blinded to the autopsy findings and scored by body region (head–neck, thoracoabdominal, and extremities). Injury discrepancies were scored using a modified Goldman classification and analyzed with McNemar’s test. We included 60 males and 20 females (median age 31 years, range 3–73). Based on PMCT, 56 (79.1%) cases had injuries relevant to the cause of death in a single body region (24 head–neck region, 32 thoracoabdominal region). Out of these 56 cases, 9 had a missed major diagnosis by PMCT outside that region, including 6 extremity injuries visible during standard external examination. Yet all had evident lethal firearm injury. We showed that PMCT identifies major firearm injuries in homicide victims and excludes injuries related to the cause of death in other regions when a single body region is injured. Although PMCT has a known limited sensitivity for soft tissue and vascular pathology, it can be combined with external examination to potentially reduce or focus dissections in some of these cases depending on the circumstances and medicolegal needs. 相似文献
3.
Astrid H. M. Nordin Graham M. Smith Raoul Bunskoek Chiung-chiu Huang Yih-jye Hwang Patrick Thaddeus Jackson 《Cambridge Review of International Affairs》2019,32(5):570-581
AbstractWhat is ‘relational theorizing’ in International Relations and what can it offer? This article introduces a thematic section that responds to these questions by showing two things. First, relational theorizing is not a doctrine or a method, but a set of analyses that begin with relations rather than the putative essences of constitutively autonomous actors. Second, relational theorizing has emerged from different geo-linguistic traditions, and a relational approach to International Relations (IR) can offer the language and space for increased and productive engagement beyond Anglophone scholarship. This thematic section takes a significant step in this direction by staging a dialogue between Sinophone and Anglophone scholarship on relational IR theorizing. Such an engagement shows points of comparison and contrast, convergence and divergence. In this way, the essays presented here contribute to developing a more ‘global’ IR. 相似文献
4.
This article presents the findings of the first research study of the Institutional Hearing Program (IHP), a prison-based immigration court system run by the U.S. Department of Justice. Although the IHP has existed for four decades, little is publicly known about the program's origin, development, or significance. Based on original analysis of archival records, this study makes three central contributions. First, it traces the origin and growth of the IHP within federal, state, and municipal correctional facilities. Notably, although the IHP began in 1980 as a program to deport Cuban asylum seekers held in civil detention in an Atlanta prison, it now operates to deport noncitizens serving prison sentences in twenty-three federal prisons, nineteen state prison systems, and a few municipal jails. Second, this article uncovers the crucial role that prison-based immigration courts have played in shaping the design of carceral institutions around the priorities of an immigration system that primarily targets Latinos for deportation. Third, this article shows how immigration courts embedded in carceral spaces have served as influential, yet overlooked, incubators of changes to immigration law and practice that today apply to all immigration courts, not just the IHP. These findings have important implications for contemporary understandings of the relationship between immigration detention, racialized control of migration, and penal punishment. 相似文献
5.
This article examines the relationship between leadership and public value, which is particularly challenging in a context of explicit contest and conflict. The theoretical framework is illustrated through a case study of policing rural crime. The study reveals that the police worked with multiple and competing publics rather than a single homogeneous public, and that part of their leadership role was to create and convene a public space in which different voices and divergent views could be expressed. The study notes that research needs to pay attention to the loss and displacement of public value, not solely its creation and recognition. The need to convene multiple publics required the police to lead, as part of a leadership constellation, and with political astuteness. The findings have wider relevance for other public services, and for studies of leadership and public value at the intersection between the state and civil society. 相似文献
6.
Sabrina Zorbo M.S. Patrick P. J. M. H. Jeuniaux Ph.D. 《Journal of forensic sciences》2020,65(2):641-648
In the case of suspicious deaths, the technique of 1:1 taping is often used in Belgium. It consists of affixing a large number of adhesive tapes to the body of the victim. It is conventionally aimed at obtaining microtraces (e.g., fibers, hair) and is usually not used for DNA analysis. However, in some cases, DNA analysis of certain areas of interest identified on the 1:1 taping material can offer a last resort solution. The four-step method that is described in this article involves the selection of areas of interest on the body (Step 1), the selection of the corresponding tapes (Step 2), the decontamination of the tapes (Step 3), the selection of areas of interest on the tapes, for DNA sampling (Step 4). The method is illustrated by its successful application in four murder cases. In each case, DNA profiles of good quality could be identified, including profiles of persons different from the victim. 相似文献
7.
While the concepts of race and ethnicity have been abused historically, they are potentially invaluable in epidemiology and public health. Epidemiology relies upon variables that help differentiate populations by health status, thereby refining public health and health care policy, and offering insights for medical science. Race and ethnicity are powerful tools for doing this. The prerequisite for their responsible use is a society committed to reducing inequalities and inequities in health status. When this condition is met, it is irresponsible not to utilize these concepts. 相似文献
8.
Ernst-Rainer Hönes 《Natur und Recht》2006,28(5):279-285
Die von Deutschland nach Art. 59 Abs. 2 GG ratifizierten europ?ischen und internationalen übereinkommen zum Denkmal- und Kulturgüterschutz
müssen in nationales Recht transformiert werden. W?hrend die L?nder im Rahmen ihrer Kompetenz (Art. 30, 70, 83 GG) Denkmalschutzgesetze
erlassen haben, hat der Bund in einschl?gigen Gesetzen wie dem Bundeswaldgesetz den Denkmalschutz bisher nicht berücksichtigt.
Dabei ist bei einem Waldanteil von 30% der Wald mit seinen historischen Kulturlandschaften und seinem Waldboden als Archiv
der Natur- und Kulturgeschichte von besonderer Bedeutung. Da Deutschland 60 Jahre nach Kriegsende endlich auch ausdrücklich
ein Kulturstaat werden soll, ist es an der Zeit, dass die Belange des Denkmalschutzes auch im Bundeswaldgesetz (z.B. §§ 1,
2, 9 oder 11 BWaldG) berücksichtigt werden. Einige Verpflichtungen zum Denkmal- und Kulturgüterschutz sind heute ohnehin bereits
V?lkergewohnheitsrecht (Art. 25 GG). 相似文献
9.
10.
Stab wounds were made in parenchymatous organs (e.g. liver, spleen, kidneys, lungs) using a variety of instruments. The shape of the resulting canal was investigated by X-ray analysis after introduction of an X-ray contrast medium. The best contrast was obtained using a contrast medium containing barium. The shape of the canal gave a direct representation of the outline of the instrument used. The width of the canal was however, always several millimeters smaller than the corresponding blade of the instrument. The position of the blade back in single-edged blades could be demonstrated with stronger contrast. 相似文献