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   2669篇
  免费   49篇
  国内免费   1篇
教育   1703篇
科学研究   205篇
各国文化   57篇
体育   299篇
综合类   1篇
文化理论   26篇
信息传播   428篇
  2023年   8篇
  2022年   17篇
  2021年   38篇
  2020年   63篇
  2019年   129篇
  2018年   142篇
  2017年   148篇
  2016年   106篇
  2015年   72篇
  2014年   108篇
  2013年   580篇
  2012年   81篇
  2011年   79篇
  2010年   77篇
  2009年   82篇
  2008年   81篇
  2007年   77篇
  2006年   61篇
  2005年   64篇
  2004年   48篇
  2003年   53篇
  2002年   47篇
  2001年   36篇
  2000年   35篇
  1999年   30篇
  1998年   43篇
  1997年   26篇
  1996年   19篇
  1995年   21篇
  1994年   22篇
  1993年   20篇
  1992年   19篇
  1991年   16篇
  1990年   28篇
  1989年   24篇
  1988年   8篇
  1987年   14篇
  1986年   8篇
  1985年   9篇
  1984年   10篇
  1983年   17篇
  1981年   8篇
  1980年   10篇
  1977年   8篇
  1976年   7篇
  1975年   6篇
  1974年   6篇
  1968年   5篇
  1870年   6篇
  1868年   6篇
排序方式: 共有2719条查询结果,搜索用时 774 毫秒
81.
82.
There is inconclusive evidence concerning the effects of routine participation in ultra-endurance events on cardiovascular disease (CVD) risk. Arterial compliance is a reliable, non-invasive, and effective tool for evaluating CVD risk. The purpose of this research was to examine if race length influences acute changes in arterial compliance following an ultra-marathon event. A total of 46 ultra-marathon runners were recruited including 21 participants (39.8?±?8.3?years, 6 females) in the 80-km event and 25 participants (43.7?±?9.8?years, 3 female) in the 195-km event. Arterial compliance was measured via radial applanation tonometry (CR-2000, HDI) for diastolic pulse contour analysis before and following the race. Significant between-group differences were found for changes in large arterial compliance with a decrease (increase in stiffness) following the 195-km event and an increase following the 80-kilometre event (p?<?.05). Longer race lengths are associated with greater reductions in large arterial compliance following recreational ultra-marathon running. Assessment of arterial compliance might be a useful prognostic tool to assess the long-term risk of CVD among ultra-marathon runners.  相似文献   
83.
Elementary and special education teachers and school counsellors currently provide support to children presenting learning disabilities and behavioural problems symptomatic of the more hidden diagnosis of complex trauma resulting from abuse or severe attachment disruption. Specific disorders such as attention deficit/hyperactivity disorder (AD/HD) may be diagnosed in such children, but not the aetiology of complex trauma, resulting in missing information in the development of remedial and behavioural interventions. The evolving field of trauma counselling provides important information to special education teachers and school counsellors who work with children who have experienced trauma. In this review article authors Linda O'Neill of the University of Northern British Columbia (UNBC), Francis Guenette who is a doctoral student at the University of Victoria and Andrew Kitchenham of the University of Northern British Columbia summarise attachment, neurobiological, and complex trauma research that can be used in school settings to understand better the needs of these children. They conclude by suggesting that teachers and school counsellors would benefit from training on the consequences of childhood trauma and attachment disruption to develop interventions that will be effective and to identify what types of behaviours children can control and those they cannot.  相似文献   
84.
Although the curriculum subject of English is continually reviewed and revised in all English speaking countries, the status of literature is rarely questioned: i.e. that it is of high cultural value and all students should be taught about it. The concerns of any review, in any country, are typically about what counts as literature, especially in terms of national heritage, and then how much of the curriculum it should occupy. This paper reports on three inter‐related pieces of research that examine the views of in‐service and pre‐service English teachers about their experiences of teaching literature and their perceptions of its ‘status’ and significance, both at official level and in the classroom; it draws attention to how England compares with some other English‐speaking countries and to the need to learn from the negative outcomes of political policy in England. The findings suggest that the nature of engagement with literature for teachers and their students has been distorted by official rhetorics and assessment regimes and that English teachers are deeply concerned to reverse this pattern.  相似文献   
85.
86.
87.
The objective of this research was to identify the effects of participation in learning on the subjective wellbeing of older adults. Data were from the English Longitudinal Study of Ageing (ELSA), a large-scale, nationally representative survey of those aged 50 and above. The survey contains several wellbeing measures and information on three types of learning: formal courses, music/arts/evening classes and gym/exercise classes. Multiple regression analyses were applied to the change in wellbeing outcomes between two survey waves. The key finding was that music, arts and evening classes were significantly associated with changes in each of the measures of subjective wellbeing. Formal courses and gym/exercise classes were not significantly associated with wellbeing, after controlling for other factors.  相似文献   
88.
The influence of preparation time on ankle joint biomechanics during highly dynamic movements is largely unknown. The aim of this study was to evaluate the impact of limited preparation time on ankle joint loading during highly dynamic run-and-cut movements. Thirteen male basketball players performed 45°-sidestep-cutting and 180°-turning manoeuvres in reaction to light signals which appeared during the approach run. Both movements were executed under (1) an easy condition, in which the light signal appeared very early, (2) a medium condition and (3) a hard condition with very little time to prepare the movements. Maximum ankle inversion angles, moments and velocities during ground contact, as well as EMG signals of three lower extremity muscles, were analysed. In 180°-turning movements, reduced preparation time led to significantly increased maximum ankle inversion velocities. Muscular activation levels, however, did not change. Increased inversion velocities, without accompanying changes in muscular activation, may have the potential to destabilise the ankle joint when less preparation time is available. This may result in a higher injury risk during turning movements and should therefore be considered in ankle injury research and the aetiology of ankle sprains.  相似文献   
89.
90.
This article reports on a study which was part of a two year writing project undertaken by a University in South East England with 17 primary schools. A survey sought the views of up to 565 children on the subject of writing. The analysis utilises Ivanič's ( 2004 ) discourses of writing framework as a heuristic and so provides a unique lens for a new understanding of children's ideological perspectives on writing and learning how to write. This study shows the development of learned or acquired skills and compliance discourses by the participating children within which accuracy and correctness overrides many other considerations for the use of the written word.  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