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   41059篇
  免费   1621篇
  2020年   526篇
  2019年   819篇
  2018年   907篇
  2017年   1114篇
  2016年   1191篇
  2015年   923篇
  2014年   899篇
  2013年   14041篇
  2012年   1039篇
  2011年   1056篇
  2010年   1063篇
  2009年   1061篇
  2008年   998篇
  2007年   910篇
  2006年   815篇
  2005年   567篇
  2004年   563篇
  2003年   522篇
  2002年   499篇
  2001年   493篇
  2000年   431篇
  1999年   488篇
  1998年   451篇
  1997年   412篇
  1996年   397篇
  1995年   408篇
  1994年   354篇
  1993年   399篇
  1992年   383篇
  1991年   289篇
  1990年   280篇
  1989年   299篇
  1988年   300篇
  1987年   318篇
  1986年   289篇
  1985年   405篇
  1984年   440篇
  1983年   439篇
  1982年   387篇
  1981年   374篇
  1980年   412篇
  1979年   408篇
  1978年   403篇
  1977年   422篇
  1976年   372篇
  1975年   378篇
  1974年   283篇
  1973年   256篇
  1972年   243篇
  1970年   218篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
871.
Current theoretical understanding of compliance with international law is based on an assumption that international law consists of a finite set of objective, compulsory rules. This image does not match reality but the two can be reconciled through theorising international law as ideology. Such an approach subsumes questions as to why states do or do not obey law and what influence international law has on foreign policy decision making. By placing the relationship of state behaviour to international law in a broader perspective it can account for previously identified determinants of compliance and provide a basis on which to assess their relative significance. At the same time, the research agenda regarding compliance is broadened by the introduction of fresh questions.  相似文献   
872.
873.
874.
In recent years, cultural anthropologists have made notable progress in understanding the bewildering variety of material exchange transactions found among the aboriginal populations of highland New Guinea. One of the major findings of this work is that competitive exchange behavior may bring in its wake alterations in agronomic practices involving an intensification of production. That intensification is primarily a product of social behavior, rather than an adaptation to climate change or population pressure, is a significant conclusion that should influence the thinking of archaeologists as they investigate past episodes of agronomic change, including the origins of agriculture.  相似文献   
875.
Significant advances in our understanding of ancient agricultural practices in the Americas have been made in recent years. This review of the literature focuses on studies published between 1987 and early 1994. Issues pertaining to the transition from foraging to farming include the habitability of the American tropics prior to the development of agriculture, theories on plant domestication and the origins of agriculture, regional syntheses of agricultural development, and the origin, evolution, and dissemination of domesticates in the Americas. Other topics reviewed include new techniques that have recently been applied to the study of prehistoric agriculture in the Americas, various approaches to the study of agricultural change, and ways in which research on ancient agricultural practices is being applied in modern experimental agriculture and rural development projects.  相似文献   
876.
877.
878.
879.
880.
Book reviewed in this article: The Waiting List: An Iraqi Woman's Tales of Alienation, Daisy Al-Amir Arab Women Novelists: The Formative Years and Beyond, Joseph T. Zeidan Populism and Feminism in Iran, Haideh Moghissi  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