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   308篇
  免费   10篇
  2023年   6篇
  2022年   3篇
  2020年   4篇
  2019年   8篇
  2018年   10篇
  2017年   8篇
  2016年   9篇
  2015年   9篇
  2014年   10篇
  2013年   78篇
  2012年   8篇
  2011年   7篇
  2010年   16篇
  2009年   10篇
  2008年   19篇
  2007年   7篇
  2006年   6篇
  2005年   1篇
  2004年   4篇
  2003年   6篇
  2002年   6篇
  2001年   8篇
  2000年   5篇
  1999年   7篇
  1998年   6篇
  1997年   4篇
  1996年   2篇
  1995年   2篇
  1994年   2篇
  1993年   3篇
  1991年   1篇
  1990年   2篇
  1989年   2篇
  1987年   4篇
  1986年   2篇
  1985年   1篇
  1984年   5篇
  1983年   2篇
  1982年   5篇
  1980年   2篇
  1979年   4篇
  1978年   4篇
  1977年   1篇
  1976年   4篇
  1974年   1篇
  1968年   1篇
  1967年   2篇
  1966年   1篇
排序方式: 共有318条查询结果,搜索用时 296 毫秒
101.
Jane Wills 《对极》2005,37(1):139-159
This paper highlights the importance of organising workers in the low‐paid services sector if British trade unions are to secure themselves for the future. After outlining the scale of the challenge and the new efforts being made to promote organising by unions, the paper looks at the hotel industry in more depth. A case study of a union campaign to win union recognition at the Dorchester Hotel in London is used to highlight the limitations of workplace‐focused campaigns in this sector. Drawing on the lessons of experience in North America, the paper then argues that an extra ‐workplace, occupational and/or sectoral approach may well secure better results. In so doing, workplace issues could be recast as matters of economic and social injustice, widening the scale of any campaign.  相似文献   
102.
103.
This contribution collates information about wrecked slaving vessels discovered or sought by maritime archaeologists since 1972. To date, only a handful of firmly identified, active slave ships have been subject to excavation, but additional work has been carried out on wrecks of former slaver ships and possible slavers. The impending 200th anniversaries of the abolition of the British and US slave trades (2007 and 2008, respectively) appear to have stimulated a new wave of interest in slaver wrecks, and these new initiatives are also discussed.  相似文献   
104.
105.
We studied interrelationships among age, sex, and cross‐sectional cortical bone dimensions using quantitative computed tomography (QCT) scans of metatarsal bones of 180 moose (Alces alces) that died in Isle Royale National Park, Michigan. As a large‐bodied quadruped with demanding ecological constraints on movement and behaviour, a moose experiences different weight‐bearing and mechanical stressors than humans, to whom most existing studies of mechanical adaptations of bone pertain. In moose, both sexes showed significant subperiosteal expansion and an increase in medullary area, with an overall increase in cortical bone area over time. Female moose did not exhibit cortical thinning or reduction in cross‐sectional area with age, rather they showed an increase in cortical bone area with periosteal apposition exceeding endosteal resorption, similar to the males. We also found that moose undergo changes in bone geometry through remodelling of bone similar to humans, suggesting a compensatory mechanism for increasing bone strength under conditions of decline in bone mineral density with age. Copyright © 2002 John Wiley & Sons, Ltd.  相似文献   
106.
This paper details the differential diagnosis of a biological artifact recovered from a burial within the Koster Middle Archaic site in Illinois. The burial was excavated from the Middle Archaic 3, Helton Phase component (∼5800–4900 BP). The artifact was a calcified nodule of unequivocal biological origin recovered from the pelvic region of an adult (50+ years) female. Morphological and radiographic analysis of the object resulted in the consideration of 19 possible diagnoses; all but four could be eliminated. Possible interpretations of the object as a lithopaedion, calcified lymph node, amputated ovary or simple ovarian cyst are examined in detail. Of these, calcified lymph node or amputated ovary remain most probable. Copyright © 2003 John Wiley & Sons, Ltd.  相似文献   
107.
108.
109.
110.
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