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   999篇
  免费   38篇
  2023年   6篇
  2021年   4篇
  2020年   20篇
  2019年   27篇
  2018年   39篇
  2017年   37篇
  2016年   34篇
  2015年   36篇
  2014年   36篇
  2013年   263篇
  2012年   21篇
  2011年   26篇
  2010年   23篇
  2009年   35篇
  2008年   39篇
  2007年   26篇
  2006年   13篇
  2005年   20篇
  2004年   10篇
  2003年   12篇
  2002年   19篇
  2001年   19篇
  2000年   15篇
  1999年   12篇
  1998年   10篇
  1997年   13篇
  1996年   7篇
  1995年   9篇
  1994年   7篇
  1993年   13篇
  1992年   5篇
  1991年   10篇
  1990年   8篇
  1989年   11篇
  1988年   6篇
  1987年   8篇
  1986年   7篇
  1985年   10篇
  1984年   18篇
  1983年   10篇
  1982年   9篇
  1981年   10篇
  1980年   7篇
  1979年   15篇
  1978年   8篇
  1977年   7篇
  1976年   4篇
  1975年   9篇
  1974年   5篇
  1972年   4篇
排序方式: 共有1037条查询结果,搜索用时 15 毫秒
51.
Bell, P.R., Burns, M.E. & Smith, E.T. October 2017. A probable ankylosaurian (Dinosauria, Thyreophora) from the Early Cretaceous of New South Wales, Australia. Alcheringa 42, 120–124. ISSN 0311-5518.

We describe an isolated osteoderm from the Albian Griman Creek Formation where it is exposed near the town of Lightning Ridge in central-northern New South Wales, Australia. Several lines of evidence allow referral of this element to the Ankylosauria—a group that epitomises body armour and ubiquitous osteodermal coverage among dinosaurs. Despite the abundant record of fossil vertebrates from this interval, ankylosaurians have not been previously reported, although, they have been described from penecontemporaneous deposits in western Queensland and Victoria. This discovery, therefore, provides an important link between the northerly faunas (including the Griman Creek Formation) that flourished at the edge of the epeiric Eromanga Sea, with those from the sub-polar rift-valley system of Victoria during the mid-Cretaceous.

Phil R. Bell [], School of Environmental and Rural Science, University of New England, Armidale 2351, NSW, Australia; Michael E. Burns [], Department of Biology, Jacksonville State University, 700 Pelham Rd N., Jacksonville, AL 36265-2138, USA; Elizabeth T. Smith [], Australian Opal Centre, Lightning Ridge 2834, NSW, Australia.  相似文献   

52.
Drawing from the importance of narrative inquiry in contemporary geographical reasoning and teaching, this paper focuses on some practices set around the relationship between maps and literature. Reader-generated maps, maps produced starting from the reading of a literary text, are at the core of a reflection on the potentialities of literary mapping in higher education; relating maps and literature in an educational environment, I suggest creative reading and creative mapping as co-constructive practices that are able to guide students in addressing and internalising the complexity of spatial categories. Reflecting on the students’ literary mappings, I focus on the various ways that the literary map contributes to mobilising the space of the text, guiding students in approaching spatial issues from a different (and creative) perspective. Time, point of view and literary trans-scalarity are the key narrative concepts that guide and inform possible inductive ruminations on literary mapping as a learning strategy. Following the core question of “what literary mapping might be and do in the digital age”, I aim to resituate contemporary discussions on literary mapping in an educational environment.  相似文献   
53.
54.
55.
56.
57.
Abstract

Famines in the years immediately after World War II occurred during a period of global flux, as international famine response evolved from its ambitious, early twentieth century goals toward more modest, technocratic objectives during the second half of the century. For economists, social scientists and politicians immersed in the world of emergency food aid, these were uncertain, awkward years for famine relief. Herbert Hoover’s idealistic large-scale projects of famine relief that had dominated the first three decades of the century had been proven to be expensive and of limited efficacy, but Cold War loyalties had not yet taken over as the primary logic behind large-scale humanitarian assistance projects. Ultimately, when faced with famine conditions between 1944 and 1947, states and experts balanced a call to action against pragmatism that recognized famines were also politically expedient events that could weaken rural resistance to governance and simplify wartime and postwar administration. Ultimately, both science and humanitarian concerns learned to orient themselves toward economic expediency in these awkward years.  相似文献   
58.
The contributions to the collection under review offer a wide range of treatments of ways in which German colonialism intersected with aspects of domestic German culture and politics, with particular attention to the larger global setting in which the German colonial empire existed between 1884 and 1918—or was remembered up to 1945. The review situates and critiques the contributions in interpretive contexts based on general suggestions by one of the editors, Geoff Eley. These include a context in which “colonialism” and “imperialism” are recognized as specific discursive constructions of the late nineteenth and early twentieth centuries, another in which the causal focus in interpreting colonial phenomena is placed on exchanges that constituted an accelerating globality with which available conceptual modes (including colonialism and imperialism) could not keep pace, a third that complicates the categorical distinctions usually made between types of imperial program, and a fourth that aims at replicating on a much broader and more flexible basis something like the concept of “social imperialism” that forty years ago dominated interpretations of German imperialism. The essay ends with a view of how such an interpretive framework might be constructed.  相似文献   
59.
Ron J. Smith 《对极》2016,48(3):750-769
Scholars have argued that in attempts to achieve geopolitical goals, siege often results in covert assaults against civilian populations. In the Gazan context, siege subjects are rendered as surplus to the Israeli state, and are therefore isolated and deprived of basic human needs as well as human rights. In 2006, siege was enacted against Gaza, enforced by the Egyptian and Israeli militaries. As a consequence, the population of Gaza is isolated from the exchange of goods, services, people, and ideas. This article begins with an analysis of siege as a violent process and as a subset of occupation practices. Using ethnographic data collected in Gaza between 2009 and 2014, this article mobilizes the methods and approach of subaltern geopolitics to undermine the notion of siege as a humanitarian alternative to war. This study reveals the micro‐scale, graduated nature of siege and its impacts on the civilians living in Gaza.  相似文献   
60.
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