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   944篇
  免费   22篇
教育   662篇
科学研究   64篇
各国文化   13篇
体育   114篇
文化理论   14篇
信息传播   99篇
  2023年   4篇
  2022年   4篇
  2021年   5篇
  2020年   14篇
  2019年   27篇
  2018年   19篇
  2017年   43篇
  2016年   28篇
  2015年   15篇
  2014年   26篇
  2013年   271篇
  2012年   25篇
  2011年   37篇
  2010年   18篇
  2009年   16篇
  2008年   21篇
  2007年   30篇
  2006年   19篇
  2005年   22篇
  2004年   19篇
  2003年   30篇
  2002年   18篇
  2001年   10篇
  2000年   14篇
  1999年   13篇
  1998年   7篇
  1997年   11篇
  1996年   8篇
  1995年   9篇
  1994年   12篇
  1992年   11篇
  1991年   11篇
  1990年   8篇
  1989年   11篇
  1988年   6篇
  1987年   9篇
  1986年   6篇
  1985年   12篇
  1984年   9篇
  1983年   11篇
  1982年   10篇
  1979年   5篇
  1978年   5篇
  1977年   7篇
  1976年   5篇
  1974年   3篇
  1973年   3篇
  1970年   4篇
  1969年   4篇
  1882年   3篇
排序方式: 共有966条查询结果,搜索用时 15 毫秒
1.

Key points

  • It is more important to a funder to know that the research advances knowledge and has an impact on the field than that it is published in a prestigious journal (or not).
  • Improving journal quality assurance is more important than improving the business model.
  • Focusing on open access misses the point that journals need to improve their quality standards.
  相似文献   
2.
A ‘circle of support’ is a concept with wide application in a range of circumstances and is developing as an important means of promoting social inclusion. In this article Nadine Jay describes the development of ‘circles of support’ for young people with disabilities. She provides an illuminating account of how they function, and of the powerful part the family and community can play in complementing the work of professionals.  相似文献   
3.
4.
5.
6.
7.
Although science has received much attention as a political and educational initiative, students with learning disabilities (LD) perform significantly lower than their nondisabled peers. This meta‐analysis evaluates the effectiveness of instructional strategies in science for students with LD. Twelve studies were examined, summarized, and grouped according to the type of strategy implemented. Effect sizes (ES) were calculated for each study. Across all studies, a mean ES of .78 was obtained, indicating a moderate positive effect on students with LD science achievement. Findings also align with past reviews of inquiry‐based instruction for students with special needs, indicating that students with LD need structure within an inquiry science approach in order to be successful. Additionally, results suggest that mnemonic instruction is highly effective at increasing learning disabled students' acquisition and retention of science facts.  相似文献   
8.
9.
10.
Heavy training is associated with increased respiratory infection risk and antimicrobial proteins are important in defence against oral and respiratory tract infections. We examined the effect of 14 weeks of vitamin D3 supplementation (5000 IU/day) on the resting plasma cathelicidin concentration and the salivary secretion rates of secretory immunoglobulin A (SIgA), cathelicidin, lactoferrin and lysozyme in athletes during a winter training period. Blood and saliva were obtained at the start of the study from 39 healthy men who were randomly allocated to vitamin D3 supplement or placebo. Blood samples were also collected at the end of the study; saliva samples were collected after 7 and 14 weeks. Plasma total 25(OH)D concentration increased by 130% in the vitamin D3 group and decreased by 43% in the placebo group (both = 0.001). The percentage change of plasma cathelicidin concentration in the vitamin D3 group was higher than in the placebo group (= 0.025). Only in the vitamin D3 group, the saliva SIgA and cathelicidin secretion rates increased over time (both = 0.03). A daily 5000 IU vitamin D3 supplement has a beneficial effect in up-regulating the expression of SIgA and cathelicidin in athletes during a winter training period, which could improve resistance to respiratory infections.  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