全文获取类型
收费全文 | 6875篇 |
免费 | 183篇 |
出版年
2020年 | 66篇 |
2019年 | 82篇 |
2018年 | 418篇 |
2017年 | 333篇 |
2016年 | 371篇 |
2015年 | 125篇 |
2014年 | 112篇 |
2013年 | 1625篇 |
2012年 | 159篇 |
2011年 | 315篇 |
2010年 | 309篇 |
2009年 | 155篇 |
2008年 | 199篇 |
2007年 | 211篇 |
2006年 | 91篇 |
2005年 | 119篇 |
2004年 | 93篇 |
2003年 | 45篇 |
2002年 | 63篇 |
2001年 | 82篇 |
2000年 | 72篇 |
1999年 | 70篇 |
1998年 | 62篇 |
1997年 | 63篇 |
1996年 | 57篇 |
1995年 | 51篇 |
1994年 | 59篇 |
1993年 | 64篇 |
1992年 | 63篇 |
1991年 | 48篇 |
1990年 | 47篇 |
1989年 | 51篇 |
1988年 | 57篇 |
1987年 | 62篇 |
1986年 | 53篇 |
1985年 | 77篇 |
1984年 | 62篇 |
1983年 | 86篇 |
1982年 | 78篇 |
1981年 | 71篇 |
1980年 | 75篇 |
1979年 | 63篇 |
1978年 | 58篇 |
1977年 | 84篇 |
1976年 | 50篇 |
1975年 | 67篇 |
1974年 | 51篇 |
1973年 | 40篇 |
1971年 | 36篇 |
1969年 | 36篇 |
排序方式: 共有7058条查询结果,搜索用时 31 毫秒
971.
Jochen Hoock 《Revue de synthèse / Centre international de synthèse》2011,132(2):277-291
The activities of jurists, they may be judges, lawyers or university teachers, occupy a central role in the maintenance of the political and social order of modern societies. In Germany the confrontation of the recent past provoked in the early 1960’s a large debate about the real foundations of the modern state and his role in the crisis of the modernity which have been pursuit in the course of the eighties issuing in the beginning of the century in the discussions about integration and a general order of values to be recognized by everybody. 相似文献
972.
973.
Gebremeskel H. Gebremariam Tesfa G. Gebremedhin Peter V. Schaeffer 《Journal of regional science》2011,51(1):102-120
ABSTRACT Appalachia remains a symbol of poverty in the midst of prosperity. During the 1990s it fell further behind the rest of the nation. Persistent poverty during a period of strong growth is a serious as well as an interesting subject to study. We examine determinants of growth in Appalachia between 1990 and 2000. We show that employment, migration, and median household income were jointly determined by regional covariates and that county economic conditions were conditional on the performance in neighboring counties. One conclusion is that regional cooperation and geographically focused programs may yield the greatest returns to policy investments. 相似文献
974.
975.
976.
Bertram Mapunda 《African Archaeological Review》2011,28(3):161-175
Pre-colonial African ironworking was much more than just a technology; it encompassed economic, social, political, symbolic,
and even healing components. It is only unfortunate that archaeometallurgical research has not availed equal weight to each
aspect, hence the apparent obscurity of some of them. Revealing the multiple facets of healing as manifested in ironworking
technology, this paper attempts to rectify this imbalance. Essentially, the paper examines pros and cons of combining ironworking
with healing of humans, a phenomenon common among ironworking communities in pre-colonial Africa. It is revealed that by combining
the two, iron smelters ensured themselves of gains beyond technology and economy; they also became socially and politically
influential. In addition, the paper notes that there existed a very close connection between healing and ritualism not only
among smelter–healers but also conventional healers. After a thorough examination, it is found that the connection between
the two was also pragmatic and deliberately instituted by the practitioners in order to enhance monopoly of their trade and
protect their inventions against interlopers. 相似文献
977.
Víctor M. Fernández 《African Archaeological Review》2011,28(4):279-300
Two sites with schematic rock paintings in Western Ethiopia, where Islamic ceremonies connected with rain-making are performed
and miraculous events are said to occur regularly, are interpreted in the light of such factors as the beliefs of local informants,
the Islamic appropriation of prehistoric rituals in Northern Africa, the characteristics of similar sites linked to rain-making
rituals throughout Eastern Africa and the apotropaic meaning of schematic marks in many traditional cultures. Probably painted
by the ancestors of the current Koman language speakers during the Later Stone Age or shortly afterwards, the rock art contextual
analysis reveals the complexity of interregional relationships and processes affecting the multi-ethnic frontier regions in
pre-colonial times and shows how the local groups have recombined prehistoric and historic religions and ideologies into an
original mix that bears witness to the region’s multifaceted history. 相似文献
978.
979.
Moore PG 《Archives of natural history》2011,38(2):287-299
Food shortages, particularly of proteins, in Britain during the Second World War led to the suggestion re-surfacing that marine plankton might be harvested on an industrial scale first as human food, then turning to its potential use as a supplement to stock and poultry feed. The notion emanated in the United Kingdom from Sir John Graham Kerr, at Glasgow University. He encouraged Alister Hardy, at Hull, to develop the idea and the natural testing ground was the Clyde Sea Area (given the extensive history of plankton research at Millport). Unpublished documents from the archives of the Scottish Association for Marine Science shed new light on the interactions behind the scenes of this project between Kerr, Hardy and the Millport Marine Station's then director, Richard Elmhirst. Elmhirst, who was sceptical about the feasibility of the plan from the outset, went along with it; not least as a way of attracting welcome research funding during lean times but also, doubtless, regarding it as his patriotic duty in case the proposal proved worthwhile. 相似文献
980.
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