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   7300篇
  免费   329篇
  2023年   36篇
  2020年   108篇
  2019年   161篇
  2018年   197篇
  2017年   243篇
  2016年   268篇
  2015年   178篇
  2014年   174篇
  2013年   2165篇
  2012年   211篇
  2011年   240篇
  2010年   250篇
  2009年   206篇
  2008年   168篇
  2007年   160篇
  2006年   155篇
  2005年   171篇
  2004年   124篇
  2003年   117篇
  2002年   111篇
  2001年   111篇
  2000年   107篇
  1999年   108篇
  1998年   80篇
  1997年   80篇
  1996年   51篇
  1995年   70篇
  1994年   57篇
  1993年   69篇
  1992年   58篇
  1991年   64篇
  1990年   59篇
  1989年   49篇
  1988年   49篇
  1987年   59篇
  1986年   56篇
  1985年   76篇
  1984年   83篇
  1983年   86篇
  1982年   65篇
  1981年   72篇
  1980年   62篇
  1979年   67篇
  1978年   60篇
  1977年   54篇
  1976年   47篇
  1975年   44篇
  1974年   47篇
  1973年   41篇
  1972年   35篇
排序方式: 共有7629条查询结果,搜索用时 15 毫秒
991.
992.
993.
ABSTRACT We analyze the impact of fiscal decentralization on U.S. county population, employment, and real income growth. Our findings suggest that government organization matters for local economic growth, but that the impacts vary by government unit and by economic indicator. We find that single‐purpose governments per square mile have a positive impact on metropolitan population and employment growth, but no significant impact on nonmetropolitan counties. In contrast, the fragmentation of general‐purpose governments per capita has a negative impact on employment and population growth in nonmetropolitan counties. Our results suggest that local government decentralization matters differently for metropolitan and nonmetropolitan counties.  相似文献   
994.
995.
996.
The aim of this paper is to present and discuss empirical evidence on the dynamics of occupation and site formation processes from contemporary mobile campsites in Northwest Siberia. The questions posed are derived generally from archaeological studies of Upper Paleolithic record in Europe. We document the active Nenets summer camps at lakes and the abandoned winter and spring camps in the open tundra and the forest tundra. Analysis of the floral and zoological resources shows that plant resources and fish are available predominantly in the summer while reindeer are abundant in these regions in fall and winter when they return from summer pastures further north. When natural resources are not available, groups supplement with food purchased at shops. Within these living camps, “structures évidentes” and “structures latentes” of classical French paleoethnology cannot be distinguished as clearly as at Upper Paleolithic sites: and architectural remains, ash from hearths, and other objects may be removed from the central areas towards the site peripheries. However the investigated camps preserve a discrete structure with interior living areas (including children’s playgrounds), exterior areas with evidence of reindeer carcass processing, woodworking, and other activities, peripheral toss zones, and dispersed activity remains in the surrounding landscape.  相似文献   
997.
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   
998.
999.
This article examines the bipartisan nuclear ‘grand bargain’, namely that Australia would only export uranium to states signatory to the Non-Proliferation Treaty (NPT), in framing Australian policy and debate towards India. India has not signed the NPT, and shows no willingness to do so. Since 2006 the domestic political and media debate regarding uranium sales to India shows that this grand bargain is fraying. This article explores the major arguments that have been elucidated by Australian political party leaders either for or against uranium sales to India and concludes with a discussion of the opportunities and challenges presented to Australia if it were to make an exception for India.  相似文献   
1000.
The idea that governance has replaced government, and that networks have replaced hierarchy as the dominant mode of governance, have become mainstream views in the public policy literature. In this article, we consider a key initiative of the Rudd government in Australia, the 2020 Summit, which, at first sight, seems like an example of network governance in action. Having considered the operation and outcomes of the Summit, however, we argue that it more accurately illustrates how governments, perhaps particularly in Westminster systems, attempt to preserve hierarchy, through a process of metagovernance.  相似文献   
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