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   670篇
  免费   11篇
教育   580篇
科学研究   17篇
各国文化   3篇
体育   32篇
文化理论   6篇
信息传播   43篇
  2018年   18篇
  2017年   14篇
  2016年   18篇
  2015年   10篇
  2014年   11篇
  2013年   136篇
  2012年   15篇
  2011年   6篇
  2010年   7篇
  2009年   9篇
  2008年   14篇
  2007年   12篇
  2006年   6篇
  2005年   15篇
  2004年   19篇
  2003年   10篇
  2002年   10篇
  2001年   7篇
  2000年   10篇
  1999年   10篇
  1998年   14篇
  1997年   13篇
  1996年   12篇
  1995年   8篇
  1994年   9篇
  1993年   7篇
  1992年   16篇
  1991年   14篇
  1990年   9篇
  1988年   8篇
  1987年   8篇
  1986年   6篇
  1985年   12篇
  1984年   11篇
  1983年   9篇
  1982年   8篇
  1981年   9篇
  1980年   8篇
  1979年   10篇
  1978年   8篇
  1977年   6篇
  1975年   11篇
  1974年   9篇
  1973年   9篇
  1972年   6篇
  1971年   8篇
  1970年   6篇
  1969年   11篇
  1968年   6篇
  1966年   9篇
排序方式: 共有681条查询结果,搜索用时 15 毫秒
1.
2.
3.
An account is given of the effects of the EU Copyright Directive on the working of the library of a learned society and the changes in practices required to conform with it.  相似文献   
4.
ABSTRACT

Control of relative humidity (RH) for collections care is challenging in U.K. historic houses because they are often highly ventilated with poor heat retention, a porous building fabric and naturally tend to high (60–80%) RH if unheated. The significance of the building means that large-scale modifications and installation of air handling systems may be unfeasible and undesirable for the conservation of the building. In the late 1980s the National Trust, for English, Wales and Northern Ireland, investigated conservation heating as an RH control method that works with the natural environment of historic buildings, mimicking historic heating and requiring only modification of existing heating services or a light touch installation of new heating systems. The National Trust adopted conservation heating as its preferred method for environmental control in historic buildings from the 1990s. This method was presented at the IIC 1994 Ottawa congress on preventive conservation. Conservation heating has since been adopted by many historic house management organisations, particularly across north-west Europe, where it is well suited to the climate. This paper reviews conservation heating developments implemented by the National Trust since 1994, in response to a changing external context, new knowledge and developments in operational practice.  相似文献   
5.
The authors assessed the influences of several risk factors—self‐esteem, history of unwanted sexual contact (USC), depression, and sorority membership—on eating‐related and weight‐related attitudes and behaviors. Findings provide support for the roles of self‐esteem, depression, and USC on restricting attitudes. According to the authors' model, these independent variables predicted restricting attitudes that then predicted restricting behaviors. Implications for preventive interventions and the study's limitations are discussed.  相似文献   
6.
7.
8.
9.
10.
This study chronicled the professional journeys of two beginning science teachers. The focus of the research effort documents what brought them to science teaching and investigated their resulting career paths. Data artifacts for this instrumental case study approach included: interviews, written survey responses, personal communications and member checks. All data was transcribed and coded into emergent categories using a constant comparative analysis approach. The findings indicated that their decisions to enter and leave teaching were a complex mélange of issues that included career disposition, notions of isolation, overarching culture of the school, and future possibilities. However, most striking was their re-entry into teaching on a temporary basis after considerable time away from the classroom, which suggests that teachers develop a sense of agency regarding their career decisions. This may require researchers to reconsider how we view teacher decision-making within the context of teacher attrition and mobility. Implications for science teacher education indicate that some teachers may enter the profession considering teaching to be a transition into a different career path. Secondary science teachers may perceive multiple career options (beyond the classroom) based on their preparation and teaching experience. Further implications and possibilities for science teacher education are discussed.  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