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   243篇
  免费   16篇
  2023年   4篇
  2022年   1篇
  2021年   1篇
  2020年   10篇
  2019年   15篇
  2018年   11篇
  2017年   11篇
  2016年   10篇
  2015年   8篇
  2014年   9篇
  2013年   57篇
  2012年   6篇
  2011年   17篇
  2010年   12篇
  2009年   9篇
  2008年   5篇
  2007年   3篇
  2006年   3篇
  2005年   7篇
  2004年   2篇
  2003年   6篇
  2002年   5篇
  2001年   2篇
  2000年   4篇
  1999年   4篇
  1997年   2篇
  1995年   3篇
  1994年   2篇
  1992年   1篇
  1991年   2篇
  1990年   1篇
  1989年   2篇
  1987年   1篇
  1986年   1篇
  1985年   1篇
  1984年   3篇
  1983年   1篇
  1982年   3篇
  1980年   1篇
  1979年   1篇
  1978年   3篇
  1977年   2篇
  1976年   2篇
  1975年   1篇
  1970年   3篇
  1969年   1篇
排序方式: 共有259条查询结果,搜索用时 15 毫秒
91.
92.
93.
94.
The negotiations between Iran and the P5+11 over Tehran's nuclear enrichment activities have not only failed to reach an agreement but have brought Iran much closer to the threshold of mastering the technology to produce nuclear weapons. There are many factors that precipitated this breakdown, including the West's inability to understand and deal with the Iranian psychological disposition, the failure to present to Iran the severity of the punitive measures that could be inflicted as a consequence of their defiance, and the US administration's misleading policy that gave Iran the room to maneuver. There is an urgent need to adopt a distinctively new strategy toward Iran consisting of three tracks of separate but interconnected negotiations: The first should focus on the current negotiations on Iran's enrichment program and the economic incentive package; the second should concentrate on regional security and the consequences of continued Iranian defiance; and the third track should address Iran's and the United States' grievances against each other. The United States must initiate all three tracks without which future talks will be as elusive as the previous negotiations, except this time the West and Israel will be facing the unsettling prospect of a nuclear Iran.  相似文献   
95.
Phrygian Gordion was the political center of an influential Iron Age polity that extended across west central Anatolia during the first half of the 1st millennium BC. Though the borders of this polity remain vague a characteristic of the Phrygian “footprint” is the distribution of highly distinctive ceramics. The extent to which Gordion potters were the originators of these wares remains uncertain. In this paper we use Neutron Activation Analysis (NAA) to establish the local signature of predominantly Iron Age ceramics for this site by combining samples from several decades of excavation with an extensive regional sediment sequence. We also compare previous NAA work at Gordion to suggest that the formative stages of the Phrygian state appears to have involved a more extensive network of non-local specialist producers than previously thought.  相似文献   
96.
At the same time that the World Bank appears to be going through a process of replacing the Washington consensus with the Post-Washington consensus, the notion of social capital is coming to the fore both in development studies and social science more generally. These developments are closely connected to one another analytically: they are liable to stake out a new development agenda based on new Keynesianism and social capital in place of state versus the market; and they reflect more generally the growing influence of mainstream economics over other social sciences.  相似文献   
97.
采用矿山考古、模拟实验等方法,对中国古代采矿技术的起源与发展进行系统论证后,得出三个论点:一是关于中国古代采矿工程技术的历史进程,可分为萌芽期(史前时期)、形成期(商代中期)、初步发展期(西周时期)、创新期(春秋至战国中期)、充实提高期(秦汉至元代)、全面发展期(明清时期)这六个发展阶段。二是中国古代采矿工程技术有着浓重的中国特色并具独特的发展体系,其多种技术的配合,在很大程度上基于中国古代各种社会要素的综合。三是中国古代采矿技术观是一种有机的、整体和综合的“和”的技术观,“和”明白地表述了采矿技术观的本质特征。  相似文献   
98.
99.
100.
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