全文获取类型
收费全文 | 6990篇 |
免费 | 280篇 |
出版年
2020年 | 104篇 |
2019年 | 123篇 |
2018年 | 165篇 |
2017年 | 212篇 |
2016年 | 203篇 |
2015年 | 141篇 |
2014年 | 117篇 |
2013年 | 2133篇 |
2012年 | 138篇 |
2011年 | 164篇 |
2010年 | 176篇 |
2009年 | 168篇 |
2008年 | 168篇 |
2007年 | 140篇 |
2006年 | 123篇 |
2005年 | 95篇 |
2004年 | 96篇 |
2003年 | 92篇 |
2002年 | 95篇 |
2001年 | 83篇 |
2000年 | 90篇 |
1999年 | 108篇 |
1998年 | 85篇 |
1997年 | 67篇 |
1996年 | 70篇 |
1995年 | 66篇 |
1994年 | 61篇 |
1993年 | 84篇 |
1992年 | 71篇 |
1991年 | 48篇 |
1990年 | 49篇 |
1989年 | 73篇 |
1988年 | 59篇 |
1987年 | 69篇 |
1986年 | 64篇 |
1985年 | 89篇 |
1984年 | 111篇 |
1983年 | 93篇 |
1982年 | 74篇 |
1981年 | 86篇 |
1980年 | 97篇 |
1979年 | 81篇 |
1978年 | 86篇 |
1977年 | 78篇 |
1976年 | 104篇 |
1975年 | 89篇 |
1974年 | 55篇 |
1973年 | 51篇 |
1972年 | 42篇 |
1971年 | 40篇 |
排序方式: 共有7270条查询结果,搜索用时 15 毫秒
991.
992.
993.
994.
Windle J 《Journal of Asian and African studies》2011,46(6):663-677
This study examines India and Turkey as case studies relevant to the Senlis Council’s ‘poppies for medicine’ proposal. The proposal is that Afghan farmers are licensed to produce opium for medical and scientific purposes. Here it is posited that the Senlis proposal neglects at least three key lessons from the Turkish and Indian experiences. First, not enough weight has been given to diversion from licit markets, as experienced in India. Second, both India and Turkey had significantly more efficient state institutions with authority over the licensed growing areas. Third, the proposal appears to overlook the fact that Turkey’s successful transition was largely due to the use of the poppy straw method of opium production. It is concluded that, while innovative and creative policy proposals such as that of the Senlis proposal are required if Afghanistan is to move beyond its present problems, ‘poppies for medicine’ does not withstand evidence-based scrutiny. 相似文献
995.
Ward Alexander Penfold 《History of European Ideas》2011,37(4):475-482
During the first few decades of the twentieth century, legal theory on both sides of the Atlantic was characterized by a tremendous amount of skepticism toward the private law concepts of property and contract. In the United States and France, Oliver Wendell Holmes and François Gény led the charge with withering critiques of the abuse of deduction, exposing their forebears’ supposedly gapless system of private law rules for what it was, a house of cards built on the ideological foundations of laissez faire capitalism. The goal was to make the United States Constitution and the French civil code more responsive to the realities of industrialization. Unlike the other participants in this transatlantic critique, François Gény simultaneously insisted on the immutability of justice and social utility. His “ineluctable minimum of natural law” would guide judges and jurists toward the proper social ends, replacing deduction with teleology. The problem was that nearly all of Gény's contemporaries were perplexed by his conception of natural law, which lacked the substance of the natural rights tradition of the eighteenth and nineteenth centuries and the historicist impulse of the early twentieth. No one was more perplexed than Oliver Wendell Holmes, whose more thoroughgoing skepticism led him to see judicial restraint as the only solution to the abuse of deduction. The ultimate framework for this debate was World War I, in which both Holmes and Gény thought they had found vindication for their views. Events on the battlefield reaffirmed Gény's commitment to justice just as they reignited Holmes’ existential embrace of the unknown. In a sense, the limits of their skepticism would be forged in the trenches of the Great War. 相似文献
996.
James H. Barrett David Orton Cluny Johnstone Jennifer Harland Wim Van Neer Anton Ervynck Callum Roberts Alison Locker Colin Amundsen Inge Bødker Enghoff Sheila Hamilton-Dyer Dirk Heinrich Anne Karin Hufthammer Andrew K.G. Jones Leif Jonsson Daniel Makowiecki Peter Pope Tamsin C. O’Connell Tessa de Roo Michael Richards 《Journal of archaeological science》2011
Archaeological fish bones reveal increases in marine fish utilisation in Northern and Western Europe beginning in the 10th and 11th centuries AD. We use stable isotope signatures from 300 archaeological cod (Gadus morhua) bones to determine whether this sea fishing revolution resulted from increased local fishing or the introduction of preserved fish transported from distant waters such as Arctic Norway, Iceland and/or the Northern Isles of Scotland (Orkney and Shetland). Results from 12 settlements in England and Flanders (Belgium) indicate that catches were initially local. Between the 9th and 12th centuries most bones represented fish from the southern North Sea. Conversely, by the 13th to 14th centuries demand was increasingly met through long distance transport – signalling the onset of the globalisation of commercial fisheries and suggesting that cities such as London quickly outgrew the capacity of local fish supplies. 相似文献
997.
998.
Torben C. Rick Brendan J. Culleton Carley B. Smith John R. Johnson Douglas J. Kennett 《Journal of archaeological science》2011
Stable carbon (δ13C) and nitrogen (δ15N) isotope analyses of dog (Canis familiaris), island fox (Urocyon littoralis), and human bone collagen from CA-SRI-2 (AD 130–1830) on Santa Rosa Island, California provide a proxy of diet and the relationships between humans and these animals. Carbon isotopic signatures indicate that Native Americans and their dogs at CA-SRI-2 subsisted almost exclusively on marine resources, while the island fox ate primarily terrestrial foods. Nitrogen isotopes and archaeofaunal remains indicate that humans and dogs also ate higher trophic level foods, including finfishes, marine mammals, and seabirds with smaller amounts of shellfish. The CA-SRI-2 island foxes appear to have eaten higher amounts of terrestrial foods, similar to the diets observed in modern fox populations. These data generally confirm the commensal relationship assumed to exist between domesticated dogs and people, but the carbon isotopic composition of dogs is enriched ∼2‰ compared to humans. We hypothesize that the difference in carbon isotopes between dogs and humans may have resulted from a higher consumption of C3 plants with lower δ13C values by humans, or less likely from the ingestion by dogs of significant amounts of bone collagen, which is enriched by ∼4‰ over associated muscle. 相似文献
999.
博物馆策展人的素质与能力是博物馆陈列展览特别是专题展览成功的关键因素之一.美国大都会艺术博物馆亚洲艺术部主任、国际著名博物馆策展人屈志仁先生以"忽必烈的时代"展为例指出:博物馆策展人应同时具备学者、艺术鉴赏家与展览组织者的素质与能力,通晓与展览有关的历史学、艺术史、文化史及文物与博物馆学等学科知识,组织、协调从研究策划... 相似文献
1000.