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   42421篇
  免费   1702篇
  2020年   538篇
  2019年   857篇
  2018年   950篇
  2017年   1183篇
  2016年   1271篇
  2015年   967篇
  2014年   953篇
  2013年   14499篇
  2012年   1075篇
  2011年   1095篇
  2010年   1089篇
  2009年   1096篇
  2008年   1026篇
  2007年   942篇
  2006年   845篇
  2005年   590篇
  2004年   582篇
  2003年   539篇
  2002年   526篇
  2001年   496篇
  2000年   446篇
  1999年   496篇
  1998年   467篇
  1997年   440篇
  1996年   403篇
  1995年   419篇
  1994年   361篇
  1993年   410篇
  1992年   390篇
  1991年   295篇
  1990年   293篇
  1989年   297篇
  1988年   311篇
  1987年   330篇
  1986年   296篇
  1985年   421篇
  1984年   449篇
  1983年   451篇
  1982年   399篇
  1981年   389篇
  1980年   431篇
  1979年   421篇
  1978年   407篇
  1977年   437篇
  1976年   388篇
  1975年   387篇
  1974年   294篇
  1973年   268篇
  1972年   248篇
  1970年   216篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
941.
Recent fieldwork has considerably increased our knowledge of early Holocene settlement in Southwest Arabia. Neolithic settlement occurred within an environmental context of increased monsoonal moisture that continued during the mid-Holocene. A now well-attested Bronze Age exemplified by village- and town-scale settlements occupied by sedentary farmers developed toward the end of the mid-Holocene moist interval. The high plateau of Yemen was an early focus for the development of Bronze Age complex society, the economy of which relied upon terraced rain-fed and runoff agriculture. On the fringes of the Arabian desert, the precursors of the Sabaean literate civilization have been traced back to between 3600 and 2800 B.P., and even earlier, so that a virtually continuous archaeological record can now be described for parts of Yemen. In contrast to the highlands these societies relied upon food production from large-scale irrigation systems dependent upon capricious wadi floods. Bronze Age settlement, while showing some links with the southern Levant, now shows equal or stronger linkages with the Horn of Africa across the Red Sea. Although some regions of Yemen show breaks in occupation, others show continuity into the Sabaean period when a series of major towns grew up in response to the incense trade with the north. It is now clear that these civilizations grew up on the foundations of earlier Bronze Age complex societies.  相似文献   
942.
I summarize recent archaeological work in Oaxaca, Mexico, with a focus on questions central to world prehistory: the origin and collapse of complex societies. Monte Albán was the capital of an emerging civilization in the southern highlands of Mexico during the second half of the first millennium B.C. Soon after the foundation of the ancient city, there is evidence for state formation and a political expansion into regions outside the Valley of Oaxaca. Centuries later, Monte Albán went into decline, giving way to the competing small polities found throughout Oaxaca at the time of the Spanish conquest. Since the late 1960s, our knowledge of these changes has been transformed by study of Oaxaca's pre–Monte Albán past, regional settlement surveys, and processual model building. Evolutionary and historical perspectives allow for significant refinement of current debates surrounding the rise and fall of complex societies in Oaxaca.  相似文献   
943.
944.
945.
The Early Historic Period in the Mun Valley occupies a critical three centuries, from A.D. 500 to A.D. 800, a period often known as that of Zhenla, a name derived from early Chinese accounts. This article first describes early findings of fieldwork designed to illuminate the prehistory of the upper Mun Valley, a period which covers approximately two millennia, with initial settlement now dated between 1500 and 1000 B.C. It then considers the nature of the transition to the complex polities of Zhenla. This involves a combination of archaeological and documentary evidence. Sources for the latter are rare for the Mun Valley, but by broadening the area considered, it is possible to integrate archaeological and historical sources in order to portray the intensifying social changes which characterize the Early Historic Period. It is suggested that most of the Mun Valley was occupied by Khmer speakers during the Iron Age, people responsible for the transition to increasingly centralized polities of the Early Historic Period. In the upper reaches of the Mun catchment, and in the Chi Valley to the north, the late prehistoric inhabitants spoke Mon. They had close affinities with the Dvaravati polities of Central Thailand. If confirmed, this hypothesis would indicate a series of local trends towards increasing social complexity which we can recognize in the early epigraphic record.  相似文献   
946.
Concepts of unemployment or of the labour market are not abstract, but develop from each society's own particular logic. Taking the examples of Germany and France at the end of the nineteenth century, it is possible to see how these concepts were constructed in specific national contexts, and how they were then used in practice. This analysis leads us to rethink current ideas about work and unemployment, and to ask what their future will be in a united Europe.  相似文献   
947.
A comparison of testamentary practice in medieval Genoa with that in Douai, France, reveals how differing social orientations resulted in profoundly contrasting social practices. Genoese society was chiefly privately orientated, and patrimony in Genoa was correspondingly transmitted along a vertical dimension. The public nature of the process in Douai, meanwhile, was correlated with a wide distribution of legacies on a horizontal axis. Women in Douai, therefore, enjoyed a scope of action not experienced by their Genoese counterparts. These circumstances, in turn, require a re‐evaluation of the so‐called ‘Frauenfrage‘ — the supposed problem of too many unmarried women.  相似文献   
948.
949.
950.
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