全文获取类型
收费全文 | 10662篇 |
免费 | 295篇 |
专业分类
各国政治 | 420篇 |
工人农民 | 382篇 |
世界政治 | 716篇 |
外交国际关系 | 292篇 |
法律 | 6748篇 |
中国政治 | 69篇 |
政治理论 | 2240篇 |
综合类 | 90篇 |
出版年
2020年 | 105篇 |
2019年 | 157篇 |
2018年 | 192篇 |
2017年 | 221篇 |
2016年 | 216篇 |
2015年 | 162篇 |
2014年 | 187篇 |
2013年 | 951篇 |
2012年 | 220篇 |
2011年 | 269篇 |
2010年 | 213篇 |
2009年 | 271篇 |
2008年 | 270篇 |
2007年 | 271篇 |
2006年 | 263篇 |
2005年 | 241篇 |
2004年 | 239篇 |
2003年 | 244篇 |
2002年 | 238篇 |
2001年 | 424篇 |
2000年 | 367篇 |
1999年 | 297篇 |
1998年 | 162篇 |
1997年 | 125篇 |
1996年 | 138篇 |
1995年 | 133篇 |
1994年 | 137篇 |
1993年 | 137篇 |
1992年 | 234篇 |
1991年 | 252篇 |
1990年 | 242篇 |
1989年 | 249篇 |
1988年 | 227篇 |
1987年 | 224篇 |
1986年 | 263篇 |
1985年 | 257篇 |
1984年 | 230篇 |
1983年 | 214篇 |
1982年 | 153篇 |
1981年 | 127篇 |
1980年 | 114篇 |
1979年 | 151篇 |
1978年 | 86篇 |
1977年 | 111篇 |
1976年 | 95篇 |
1975年 | 74篇 |
1974年 | 90篇 |
1973年 | 84篇 |
1972年 | 78篇 |
1971年 | 69篇 |
排序方式: 共有10000条查询结果,搜索用时 78 毫秒
991.
992.
R. T. Naylor 《Crime, Law and Social Change》2008,50(4-5):263-291
Although crime in the market for fine arts has a long historical pedigree, the explosive growth of the market, and the conversion of art (along with collectible goods of all sorts) into speculative assets, that began or at least accelerated in the mid 1970s, focused increasing attention on the phenomenon. At the same time the issue of protecting cultural patrimony became a subject of greater contention between source and market countries, while common law and civil code jurisdictions struggled over how to reconcile approaches to regulation and enforcement. This paper highlights these issues with specific reference to the market for high-end paintings although its lessons are germane to all subdivisions of the collectibles market. It attempts to elucidate the main criminogenic factors—speculative shifts in demand, fraudulent supply, and illegal activity by various intermediary institutions ranging from dealers to appraisers to auction houses, while highlighting the role of collectors, museums, and financial institutions both as victims and active participants. Despite enduring myths about “organized crime,” illegal operations in the art market are the work overwhelmingly of insiders who alone have the technical knowledge and circle of intimates necessary to link an illicit supply with a demand that can range from the strictly legitimate, the legal but dubious, and the explicitly criminal. The critical lesson is that stolen, forged or smuggled material makes its way through much the same circles of intermediaries and ends up for the most part in the same locations and the same hands as artwork of legal origin. 相似文献
993.
The Limits of Disclosure: What Research Subjects Want to Know about Investigator Financial Interests
Christine Grady R.N. Ph.D. F. A.A.N. Elizabeth Horstmann Jeffrey S. Sussman M.P.H. Sara Chandros Hull Ph.D. 《The Journal of law, medicine & ethics》2006,34(3):592-599
Research participants' views about investigator financial interests were explored. Reactions ranged from concern to acceptance, indifference, and even encouragement. Although most wanted such information, some said it did not matter, was private, or was burdensome, and other factors were more important to research decisions. Very few said it would affect their research decisions, and many assumed that institutions managed potential conflicts of interest. Although disclosure of investigator financial interest information to research participants is often recommended, its usefulness is limited, especially when participation is desired because of illness. 相似文献
994.
995.
996.
997.
Susan A. Bollinger D.D.S. Paula C. Brumit D.D.S. Bruce A. Schrader D.D.S. David R. Senn D.D.S. 《Journal of forensic sciences》2009,54(2):422-427
Abstract: The purpose of this study was to outline a method by which an antemortem photograph of a victim can be critically compared with a postmortem photograph in an effort to facilitate the identification process. Ten subjects, between 27 and 55 years old provided historical pictures of themselves exhibiting a broad smile showing anterior teeth to some extent (a grin). These photos were termed “antemortem” for the purpose of the study. A digital camera was used to take a current photo of each subject’s grin. These photos represented the “postmortem” images. A single subject’s “postmortem” photo set was randomly selected to be the “unknown victim.” These combined data of the unknown and the 10 antemortem subjects were digitally stored and, using Adobe Photoshop software, the images were sized and oriented for comparative analysis. The goal was to devise a technique that could facilitate the accurate determination of which “antemortem” subject was the “unknown.” The generation of antemortem digital overlays of the teeth visible in a grin and the comparison of those overlays to the images of the postmortem dentition is the foundation of the technique. The comparisons made using the GrinLine Identification Technique may assist medical examiners and coroners in making identifications or exclusions. 相似文献
998.
999.
1000.
E R Sarvesvaran 《The American journal of forensic medicine and pathology》1992,13(3):264-267
Homicide by starvation is a very rare occurrence, especially when the victim is ambulant. This paper presents a case where the death of the individual went undiscovered for more than 3 weeks. A successful conviction for murder ensued. The paper also discusses social and pathological problems associated with this crime. 相似文献