首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   4931篇
  免费   456篇
  2023年   39篇
  2021年   33篇
  2020年   95篇
  2019年   186篇
  2018年   240篇
  2017年   232篇
  2016年   268篇
  2015年   186篇
  2014年   209篇
  2013年   1345篇
  2012年   181篇
  2011年   211篇
  2010年   165篇
  2009年   121篇
  2008年   142篇
  2007年   134篇
  2006年   95篇
  2005年   50篇
  2004年   69篇
  2003年   57篇
  2002年   52篇
  2001年   59篇
  2000年   79篇
  1999年   48篇
  1998年   47篇
  1997年   51篇
  1996年   48篇
  1995年   46篇
  1994年   28篇
  1992年   23篇
  1991年   30篇
  1989年   34篇
  1988年   24篇
  1987年   29篇
  1986年   33篇
  1985年   44篇
  1984年   29篇
  1983年   37篇
  1982年   30篇
  1981年   37篇
  1980年   39篇
  1979年   36篇
  1978年   37篇
  1977年   33篇
  1976年   34篇
  1975年   25篇
  1974年   21篇
  1973年   27篇
  1972年   22篇
  1969年   23篇
排序方式: 共有5387条查询结果,搜索用时 15 毫秒
1.
This paper explores the role of Hispania in the Atlantic route in Roman times. We analyse the different Atlantic Iberian territories along this route, based on recent archaeological advances and discoveries related to trade as well as the shipping infrastructure. The aim is to explain the origin and evolution of a new maritime area that was completely integrated with the political and commercial structure of the Empire, with trade routes that followed the coastal areas of the Iberian Peninsula all the way to the Mediterranean.  相似文献   
2.
3.
4.
5.
China has officially become a predominantly urban country, with over 50% of the population now registered as urban residents. Its urbanization process has been described as the most managed in human history. The Chinese government manages the building of new cities, regulates the housing of displaced people and controls squatters. As an historically poorer area, the west of China has been the target of ongoing efforts at infrastructural development. Describing urbanization as managed however masks the conflicts and contradictions involved in a process which is far from smooth. Although villagers are usually seen to be largely the powerless victims of these initiatives, it is clear that many try to take advantage of the situation, while others are unable to do so. Based on recent fieldwork and eight years of visits to one village undergoing urbanization, this article looks at the complex dynamics involved and at the moral battleground which they lay bare.  相似文献   
6.
The Late Neolithic of southeast Hungary is known almost exclusively from excavations of large settlement mounds, or tells. Geochemical analyses of sediments collected from boreholes at small, flat Late Neolithic and Early Copper Age settlements in Hungary's Körös River basin provide data necessary to interpret the spatial organization of small settlements for the first time in this region. Principal Components Analysis of multi-element data produced a workable number of variables. Spatial analyses of these components via interpolation in ArcGIS 9 identified specific task areas, and when combined with sediment characterizations, phosphate ‘spot-tests’ and pH, suggest long-term cultural traditions in the location of activity zones within small farmsteads. The results demonstrate the usefulness of multi-element geochemistry as an intra-site prospection method.  相似文献   
7.
8.
ABSTRACT. This paper uses a large data base to study metropolitan labor demand functions. The data are disaggregated by two-digit SICs in manufacturing for SMS As, and are corrected for changing SMSA boundaries. Labor demand elasticities are estimated for factor and commodity prices, transportation costs, state and local taxes and expenditures, and production-function shifters. Estimates from different years allow one to test Le Chatelier's principle in the context of interregional change.  相似文献   
9.
10.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号