全文获取类型
收费全文 | 1098篇 |
免费 | 24篇 |
出版年
2023年 | 5篇 |
2021年 | 7篇 |
2020年 | 34篇 |
2019年 | 47篇 |
2018年 | 47篇 |
2017年 | 64篇 |
2016年 | 42篇 |
2015年 | 19篇 |
2014年 | 32篇 |
2013年 | 290篇 |
2012年 | 27篇 |
2011年 | 35篇 |
2010年 | 27篇 |
2009年 | 30篇 |
2008年 | 28篇 |
2007年 | 30篇 |
2006年 | 26篇 |
2005年 | 17篇 |
2004年 | 26篇 |
2003年 | 19篇 |
2002年 | 10篇 |
2001年 | 17篇 |
2000年 | 9篇 |
1999年 | 13篇 |
1998年 | 5篇 |
1997年 | 6篇 |
1996年 | 9篇 |
1995年 | 7篇 |
1994年 | 10篇 |
1993年 | 7篇 |
1992年 | 6篇 |
1991年 | 5篇 |
1990年 | 9篇 |
1989年 | 7篇 |
1987年 | 7篇 |
1986年 | 9篇 |
1985年 | 9篇 |
1984年 | 8篇 |
1982年 | 5篇 |
1981年 | 7篇 |
1980年 | 7篇 |
1979年 | 10篇 |
1978年 | 11篇 |
1977年 | 5篇 |
1976年 | 6篇 |
1975年 | 8篇 |
1974年 | 5篇 |
1973年 | 5篇 |
1972年 | 6篇 |
1970年 | 5篇 |
排序方式: 共有1122条查询结果,搜索用时 15 毫秒
81.
82.
Behavioral ecology is the study of adaptive behavior in relation to social and environmental circumstances. Analysts working from this perspective hold that the reproductive strategies and decision-making capacities of all living organisms—including humans—are shaped by natural selection. Archaeologists have been using this proposition in the study of past human behavior for more than 30 years. Significant insights on variation in prehistoric human subsistence, life history, social organization, and their respective fossil and archaeological consequences have been among the more important results. 相似文献
83.
84.
85.
Amy Trauger 《Gender, place and culture : a journal of feminist geography》2004,11(2):289-307
Women throughout the West are up to three times more likely to be the operator of a farm in sustainable agricultural models than in productivist models. When women assume the role of farmer they transgress traditional gender identities on farms, which dictate that women are ‘farmwives’ and men are ‘farmers’; these gender identities intersect with spaces in the agricultural community to imply appropriate behavior for women as farmwives. This research demonstrates that the sustainable agriculture community provides spaces that promote and are compatible with women's identities as farmers. Feminist analyses of space and agriculture suggest that productivist agricultural models marginalize women from spaces of knowledge, while sustainable agriculture provides spaces of empowerment for women farmers. The fieldwork for this project involved a purposive survey, in‐depth interviews and participant observation with twenty women farmers over an 18‐month period in the sustainable agriculture community of Central Pennsylvania. 相似文献
86.
87.
Modern technology lends itself to holistic exploration and widely accessible outreach. New technology allows scientists studying
our planet either from space or deep under the seas, to explore and reveal both natural and cultural resources that have previously
escaped our scrutiny. However, the use of these new technologies is expensive and often the exclusive tool of industrial research.
Yet, these new technologies can lead the way to greater collaboration, better science and more public access. In 2003 and
2004, a landmark project, combining government agencies, industrial technology and outreach set new standards in collaborative
scientific exploration. The project focused on six shipwrecks at depth in the Gulf of Mexico. The questions posed by the project
illuminate how science and industry can collaborate to produce remarkable results. The papers presented in this issue form
a model for deepwater exploration. 相似文献
88.
This paper is an attempt to understand the changing characteristics of urban poverty in Turkey since 1980. First, it analyses how the urban poor in Turkey had adopted aggressive survival strategies by strengthening their solidarity networks on religious, ethnic and cultural bases until the 2000s. Then it sheds light on how those networks have dissolved later on thanks to a set of internal and external factors and concludes that Turkey now faces deepening poverty levels and engendering new forms and dynamics of poverty. This paper is based on the Sultanbeyli district of Istanbul, a district almost entirely composed of unauthorized houses whose population grew at an unprecedented rate after 1980; and it is a perfect case for the study of issues relating to migration, urbanization and poverty in Turkish cities. 相似文献
89.
GLEN O’BRIEN 《The Journal of religious history》2008,32(3):320-344
A number of North American Wesleyan‐Holiness denominations emerged in Australia, beginning in the years following the Second World War. Some of these churches moved from being despised and marginalized sects to established denominations while others remained small and isolated, experiencing little growth. Their story demonstrates that movement along the church‐sect continuum is by no means a smooth and inevitable one. Random processes may lower or raise religious tension within the group thus affecting its movement along the continuum. The strict behavioural standards in Wesleyan‐Holiness churches have gradually been lowered and the distinctive beliefs of these groups have been eroded. Wesleyan‐Holiness churches in Australia have grown primarily through “switchers” from other denominations more than from new convert growth, so that they have become more generically “Evangelical” and less distinctively “Holiness” in their beliefs and practices. 相似文献
90.
A. SANTAGOSTINO BARBONE E. GLIOZZO F. D’ACAPITO I. MEMMI TURBANTI M. TURCHIANO G. VOLPE 《Archaeometry》2008,50(3):451-473
SEM–EDS, EMPA, ICP–MS and ICP–OES were applied to the study of three sectilia panels made of red, orange and yellow glass slabs. In order to determine the chemical state of Cu, XAS was also performed. The results indicate that, with the exception of the red samples, all slabs were made by mixing a siliceous sand with natron. The red slabs show significant compositional differences with respect to K2O and MgO contents, probably linked to the use of plant ashes as a source of alkali. The red, orange and yellow slabs are coloured by metallic copper, cuprite and Pb antimonates, respectively. The comparison between the chemical composition of the Faragola samples and several glass reference groups did not provide conclusive evidence of provenance. 相似文献