全文获取类型
收费全文 | 42089篇 |
免费 | 1643篇 |
出版年
2020年 | 528篇 |
2019年 | 825篇 |
2018年 | 940篇 |
2017年 | 1145篇 |
2016年 | 1246篇 |
2015年 | 942篇 |
2014年 | 915篇 |
2013年 | 14112篇 |
2012年 | 1052篇 |
2011年 | 1095篇 |
2010年 | 1098篇 |
2009年 | 1079篇 |
2008年 | 1023篇 |
2007年 | 927篇 |
2006年 | 842篇 |
2005年 | 589篇 |
2004年 | 582篇 |
2003年 | 541篇 |
2002年 | 519篇 |
2001年 | 516篇 |
2000年 | 471篇 |
1999年 | 544篇 |
1998年 | 467篇 |
1997年 | 424篇 |
1996年 | 409篇 |
1995年 | 421篇 |
1994年 | 364篇 |
1993年 | 418篇 |
1992年 | 394篇 |
1991年 | 299篇 |
1990年 | 297篇 |
1989年 | 310篇 |
1988年 | 309篇 |
1987年 | 329篇 |
1986年 | 310篇 |
1985年 | 427篇 |
1984年 | 455篇 |
1983年 | 461篇 |
1982年 | 398篇 |
1981年 | 391篇 |
1980年 | 432篇 |
1979年 | 422篇 |
1978年 | 403篇 |
1977年 | 429篇 |
1976年 | 383篇 |
1975年 | 384篇 |
1974年 | 295篇 |
1973年 | 273篇 |
1972年 | 245篇 |
1970年 | 227篇 |
排序方式: 共有10000条查询结果,搜索用时 78 毫秒
911.
912.
913.
914.
Shirley V. Scott 《Australian journal of political science》1995,30(2):288-299
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
915.
916.
917.
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
918.
Scott L. Fedick 《Journal of Archaeological Research》1995,3(4):257-303
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
919.
920.