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   125462篇
  免费   1917篇
  国内免费   249篇
教育   87236篇
科学研究   13617篇
各国文化   2027篇
体育   9710篇
综合类   194篇
文化理论   1089篇
信息传播   13755篇
  2021年   955篇
  2020年   1670篇
  2019年   2598篇
  2018年   3165篇
  2017年   3453篇
  2016年   3495篇
  2015年   2348篇
  2014年   3207篇
  2013年   27523篇
  2012年   2451篇
  2011年   2887篇
  2010年   2428篇
  2009年   2659篇
  2008年   2506篇
  2007年   2256篇
  2006年   2454篇
  2005年   2468篇
  2004年   3119篇
  2003年   2401篇
  2002年   2253篇
  2001年   2103篇
  2000年   1741篇
  1999年   1659篇
  1998年   1477篇
  1997年   1543篇
  1996年   1707篇
  1995年   1480篇
  1994年   1480篇
  1993年   1478篇
  1992年   1519篇
  1991年   1453篇
  1990年   1446篇
  1989年   1370篇
  1988年   1239篇
  1987年   1150篇
  1986年   1187篇
  1985年   1464篇
  1984年   1325篇
  1983年   1306篇
  1982年   1261篇
  1981年   1177篇
  1980年   1163篇
  1979年   1276篇
  1978年   1233篇
  1977年   1130篇
  1976年   1012篇
  1975年   816篇
  1974年   817篇
  1973年   785篇
  1971年   635篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
The Covid-19 pandemic has driven the fastest changes to higher education across the globe, necessitated by social distancing measures preventing face-to-face teaching. This has led to an almost immediate switch to distance learning by higher education institutions. Anatomy faces some unique challenges. Intrinsically, anatomy is a three-dimensional subject that requires a sound understanding of the relationships between structures, often achieved by the study of human cadaveric material, models, and virtual resources. This study sought to identify the approaches taken in the United Kingdom and Republic of Ireland to deliver anatomical education through online means. Data were collected from 14 different universities in the United Kingdom and Republic of Ireland and compared adopting a thematic analysis approach. Once themes were generated, they were collectively brought together using a strength, weakness, opportunity, threat (SWOT) analysis. Key themes included the opportunity to develop new online resources and the chance to engage in new academic collaborations. Academics frequently mentioned the challenge that time constrains could place on the quality and effectiveness of these resources; especially as in many cases the aim of these resources was to compensate for a lack of exposure to cadaveric exposure. Comparisons of the actions taken by multiple higher education institutions reveal the ways that academics have tried to balance this demand. Discussions will facilitate decisions being made by higher education institutions regarding adapting the curriculum and assessment methods in anatomy.  相似文献   
992.
993.
James Davies 《Metascience》2015,24(3):483-486
  相似文献   
994.
995.
A wealth of literature has identified that children with behavioural, emotional and social difficulties (BESD) and their families are frequently stigmatised due to the perceived controllable and ‘invisible’ nature of this special educational need (SEN). Yet little research has considered the impact of this stigma on another group of individuals, educational practitioners employed in BESD schools. This is despite these professionals working in close contact with pupils with BESD, a heavily stigmatised group, on a regular basis. This paper therefore, details a study which explored perceptions of stigma specifically with educational professionals employed in schools for pupils with BESD. Semi‐structured interviews with nine practitioners (including head teachers and class teachers with additional responsibilities) were conducted, all of whom had worked within the BESD sector for at least 10 years, with data being analysed via Interpretative Phenomenological Analysis (IPA). Findings revealed how educational practitioners employed in BESD schools experienced courtesy stigma, with many not being perceived as ‘proper’ teachers due to a discourse of care surrounding BESD. Other professionals reported much confusion from their mainstream colleagues and other individuals about how they could want to work with such ‘challenging’ pupils. This courtesy stigma was linked to the wider stigma surrounding BESD schools, which were often ignorantly perceived to be full of ‘bad boys’ or ‘absolute horrors’. This paper concludes by considering the implications of these findings for policy and practice, and provides recommendations for addressing the identified stigma towards practitioners employed in BESD schools.  相似文献   
996.
997.
998.
ABSTRACT

Recently, there has been much controversy over the International Association of Athletics Federation (IAAF) regulations regarding eligibility to compete and natural testosterone levels in female athletes. Much interest lies in the analysis of Caster Semenya's extraordinary performance. The objective of this work were, a) Complete an analysis of Caster Semenya's results during the 800m finals and b) search for existing similar performances by other female athletes. We analysed the results of the finals of all IAAF World Championships and Olympic Games from 1984–2016, including the 800m results of the Diamond Leagues 2016–2018. Exponential curves were fit to the data to characterise and predict performance for each event. Caster Semenya's finishing times before her ineligibility to compete and after the suspension of the IAAF hyperandrogenism regulation were found to be 1.24% and 1.49%, respectively, faster than the characteristic performance of the elite-standard in the women’s 800m final. Other female athletes, with finishing times faster than the ones predicted by the characteristic curves were also discovered. The percentage difference in performance between Caster Semenya and the other participants did not reach 3% in the 800m event. No conclusions can be drawn regarding extraordinary results ever performed during the 100m, 200m or 400m finals.  相似文献   
999.
ABSTRACT

This study identified key somatic and demographic characteristics that benefit all swimmers and, at the same time, identified further characteristics that benefit only specific swimming strokes. Three hundred sixty-three competitive-level swimmers (male [n = 202]; female [n = 161]) participated in the study. We adopted a multiplicative, allometric regression model to identify the key characteristics associated with 100 m swimming speeds (controlling for age). The model was refined using backward elimination. Characteristics that benefited some but not all strokes were identified by introducing stroke-by-predictor variable interactions. The regression analysis revealed 7 “common” characteristics that benefited all swimmers suggesting that all swimmers benefit from having less body fat, broad shoulders and hips, a greater arm span (but shorter lower arms) and greater forearm girths with smaller relaxed arm girths. The 4 stroke-specific characteristics reveal that backstroke swimmers benefit from longer backs, a finding that can be likened to boats with longer hulls also travel faster through the water. Other stroke-by-predictor variable interactions (taken together) identified that butterfly swimmers are characterized by greater muscularity in the lower legs. These results highlight the importance of considering somatic and demographic characteristics of young swimmers for talent identification purposes (i.e., to ensure that swimmers realize their most appropriate strokes).  相似文献   
1000.
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