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   4677篇
  免费   232篇
  2023年   25篇
  2020年   80篇
  2019年   113篇
  2018年   155篇
  2017年   152篇
  2016年   169篇
  2015年   116篇
  2014年   114篇
  2013年   1279篇
  2012年   145篇
  2011年   169篇
  2010年   150篇
  2009年   137篇
  2008年   137篇
  2007年   108篇
  2006年   101篇
  2005年   72篇
  2004年   54篇
  2003年   63篇
  2002年   63篇
  2001年   80篇
  2000年   62篇
  1999年   69篇
  1998年   55篇
  1997年   40篇
  1996年   41篇
  1995年   50篇
  1994年   46篇
  1993年   39篇
  1992年   45篇
  1991年   35篇
  1990年   36篇
  1989年   31篇
  1988年   40篇
  1987年   47篇
  1986年   36篇
  1985年   49篇
  1984年   48篇
  1983年   50篇
  1982年   51篇
  1981年   46篇
  1980年   39篇
  1979年   33篇
  1978年   37篇
  1977年   41篇
  1976年   32篇
  1974年   37篇
  1973年   21篇
  1971年   23篇
  1970年   24篇
排序方式: 共有4909条查询结果,搜索用时 15 毫秒
991.
C. T. YAP 《Archaeometry》1986,28(2):197-201
54 pieces of Nonya wares (also known as Straits Chinese porcelains) were analysed using energy-dispersive X-ray fluorescence technique with an annular Am-241 source. Significant time correlation was found for only two elements, barium and cesium, when the ratio of the fluorescent intensity of each element to the intensity of the coherently scattered 26.4 keV gamma was plotted as a function of the time of manufacture. For trace barium, quantitative measurement showed that Nonya wares made from the Ch'ing dynasty to the Republic period had a barium content between 100 and 135 ppm, whereas modern reproduction pieces had much higher values.  相似文献   
992.
993.
994.
995.
996.
997.
998.
At emancipation in the British Caribbean in 1838, newly freed blacks in larger territories established “reconstituted peasantries” on non-plantation lands. Similar village adaptations were impossible on some smaller islands where planters continued to control all of the islands' lands. In St Kitts and Nevis landless freemen emigrated to Trinidad by the hundreds to establish individual independence and to support kinsmen and friends left behind. Within a decade most migrants from St Kitts and Nevis had returned. They had thus carved out a “migration adaptation” in response to planter oppression at home and livelihood opportunity elsewhere by expanding individual livelihood spaces across the Caribbean Sea. They thereby began to establish extra-island networks of potential labour destinations while at the same time resisting permanent commitments in any one direction except for periodically returning home. Migration and return has persisted as a widespread livelihood strategy among individuals of small Caribbean islands who continue to face economic and ecological uncertainties, conditions similar to those on St Kitts and Nevis at emancipation. Individual adaptability, not group behaviour, has always been important in migration and return in the Lesser Antilles.  相似文献   
999.
Three cross-sectional data sets for the U.S. House of Representatives are analyzed for 1973 to 1978. The conclusions are: (1) Political support for environmental legislation has remained stable and has not diminished in the face of economic problems and energy shortages. (2) The East is the region most supportive of environmental issues while the South is by far the least supportive. (3) Clear partisan differences exist with the Democrats consistently more pro-environmental than Republicans. (4) The most important factor associated with environmental support is ideology. Although interrelated with party, it is more salient than either party or constituency factors. (5) Support for pro-environmental voting is strongest in urban and suburban constituencies and weakest in rural and mixed districts.  相似文献   
1000.
Book reviews     
Heinz W. Arndt, The Rise and Fall of Economic Growth: A Study in Contemporary Thought. Longman Cheshire, Melbourne, 1978, pp. 161. $6.95.

Coral Bell (Ed.), Agenda for The Eighties. ANU Press, Canberra, 1980, pp.256. $12.95 (paper).

Mohammed Ayoob (ed.), Conflict and Intevention in the Third World. Croom Helm, London, and ANU Press, Canberra, 1980, pp. 261. $37.50.

Anthony Reid, The Blood of the People Revolution and the End of Traditional Rule in Northern Sumatra. Oxford University Press, Kuala Lumpur. 1979, pp. 288. $43.20.

Leslie H. Gelb with Richard K. Betts, The Irony of Vietnam: The System Worked. The Brookings Institution, Washington, 1979, pp. 387. £12.50 hardcover, £4.95 paper.

B. N. Pandey (ed.), Leadership in South Asia. New Delhi, Vikas Publishing House, 1977, pp.xxiv+731.

S.A.A. Rizvi, Iran: Royalty, Religion and Revolution. Ma'rifat Publishing House, Canberra, 1980, pp. 392. $30.00.

Amin Saikal, The Rise and Fall of the Shah, Princeton University Press and Angus and Robertson (Australia), 1980, pp. 279. US$14.50.

Hanna Batatu, The Old Social Classes and the Revolutionary Movements of Iraq. Princeton University Press, Princeton, 1978. pp.1283. $94.00.

Uri Davis, Israel: Utopia Incorporated. Zed Press Ltd., London, 1977, pp.182. £5.00 (Paperback: £2.95).

Rosemary Sayigh, Palestinians: From Peasants to Revolutionaries. Zed Press Ltd., London, 1979, pp.206. £8.95 (Paperback: £2.95).

Selwyn Lloyd, Suez 1956: A Personal Account. Jonathon Cape, London, 1978, pp. 282. £6.50.

John Kane‐Berman, South Africa: The Method in the Madness. Pluto Press. London. 1979, pp. 265. £2.95.

Rene Lemarchand (ed.), American Policy in Southern Africa: The Stakes and the Stance. University Press of America, Washington, D.C., 1978, pp. 450.

Richard E. Bissell, Southern Africa in the World: Autonomy or Interdependence? Foreign Policv Research Institute. Philadelphia, 1978, pp. 67. US $4.00.

Claude Ake, Revolutionary Pressures in Africa. Zed Press Ltd., London, 1978, pp. 109. £6.50.

Robin Palmer and Neil Parsons (eds.), The Roots of Rural Poverty in Central and Southern Africa. Heinemann, London, 1977, pp.xviii + 430. £2.90.

Karl Kaiser and Hans‐Peter Schwarz (eds.), America and Western Europe: Problems and Prospects. Lexington Books, D. C. Heath and Company, Lexington, Mass., 1978, pp. 448.

Walter F. Hahn and Robert L. Pfaltzgraff Jr. (eds.), Atlantic Community in Crisis: A Redefinition of the Transatlantic Relationship. Pergamon, New York. 1979. pp. 386.

Annette Baker Fox, The Politics of Attraction: Four Middle Powers and the United States. Columbia University Press, New York, pp. 371. $US21.90.

Nikolai Sivachev and Nikolai Yakovlev, Russia and the United States. University of Chicago Press, Chicago and London, 1979, pp.301. $12.95.

L. F. Fitzhardinge, The Little Digger 1914–1952: William Morris Hughes, A Political Biography, Volume II. Angus & Robertson, Sydney, 1979, pp.xx + 703. $40.

Australia and the Indonesian Revolution: by Margaret George. (M.U.P. in association with the Australian Institute of International Affairs).  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