全文获取类型
收费全文 | 4763篇 |
免费 | 53篇 |
国内免费 | 10篇 |
专业分类
教育 | 3568篇 |
科学研究 | 252篇 |
各国文化 | 45篇 |
体育 | 421篇 |
综合类 | 3篇 |
文化理论 | 63篇 |
信息传播 | 474篇 |
出版年
2022年 | 29篇 |
2021年 | 46篇 |
2020年 | 63篇 |
2019年 | 124篇 |
2018年 | 151篇 |
2017年 | 154篇 |
2016年 | 157篇 |
2015年 | 106篇 |
2014年 | 124篇 |
2013年 | 974篇 |
2012年 | 136篇 |
2011年 | 132篇 |
2010年 | 155篇 |
2009年 | 142篇 |
2008年 | 148篇 |
2007年 | 147篇 |
2006年 | 112篇 |
2005年 | 99篇 |
2004年 | 105篇 |
2003年 | 86篇 |
2002年 | 99篇 |
2001年 | 70篇 |
2000年 | 111篇 |
1999年 | 75篇 |
1998年 | 75篇 |
1997年 | 63篇 |
1996年 | 73篇 |
1995年 | 59篇 |
1994年 | 68篇 |
1993年 | 64篇 |
1992年 | 54篇 |
1991年 | 70篇 |
1990年 | 52篇 |
1989年 | 48篇 |
1988年 | 38篇 |
1987年 | 46篇 |
1986年 | 46篇 |
1985年 | 44篇 |
1984年 | 47篇 |
1983年 | 40篇 |
1982年 | 34篇 |
1981年 | 35篇 |
1980年 | 31篇 |
1979年 | 25篇 |
1978年 | 34篇 |
1977年 | 40篇 |
1976年 | 31篇 |
1975年 | 22篇 |
1974年 | 24篇 |
1972年 | 15篇 |
排序方式: 共有4826条查询结果,搜索用时 0 毫秒
11.
Joanne DiFrancisco-Donoghue William G. Werner Peter C. Douris Hallie Zwibel 《运动与健康科学(英文)》2022,11(6):725
BackgroundEsports players, like traditional athletes, practice for long hours and, thus, are vulnerable to the negative health effects of prolonged sitting. There is a lack of research on the physical activity and the health ramifications of prolonged sitting by competitive players. The purpose of this study was to investigate activity levels, body mass index (BMI), and body composition in collegiate esports players as compared to age-matched controls.MethodsTwenty-four male collegiate esports players and non-esports players between 18 and 25 years of age signed a written consent to participate. Physical activity was examined using daily activity (step count) with a wrist-worn activity tracker. A questionnaire assessing physical activity was also administered. Secondary outcomes included body-fat percentage, lean-body mass, BMI, and bone mineral content measured using dual X-ray absorptiometry.ResultsThe step count in the esports players was significantly lower than the age-matched controls (6040.2 ± 3028.6 vs. 12843.8 ± 5661.1; p = 0.004). Esports players exhibited greater body-fat percentage (p = 0.05), less lean body mass (p = 0.003), and less bone mineral content (p = 0.03), despite no difference in BMI between the esports and non-esports players.ConclusionAs compared to non-esports players, collegiate esports players were significantly less active and had a higher body-fat percentage, with lower lean body mass and bone mineral content. The BMIs showed no difference between the 2 groups. Esports athletes displayed significantly less activity and poor body composition, which are all correlated with potential health issues and risk of injury. BMI did not capture this difference and should not be considered as an accurate measure of health in competitive esports players. 相似文献
12.
香港大学图书馆领导研修班是为现任和未来图书馆领导而设的密集式培训班,预计参加者主要为现任或未来的馆长或助理馆长.研修班将采用英语作为主要讲授语言另辅以部分中文翻译,采取让学员透过一系列主题讲学、个案研究、小组活动及互动讨论的方式向其它馆员和资讯业专家学习. 相似文献
13.
14.
15.
16.
17.
Priscilla Savopoulos Stephanie Brown Peter J. Anderson Deirdre Gartland Christina Bryant Rebecca Giallo 《Child development》2022,93(4):e396-e411
The cognitive functioning of children who experience intimate partner violence (IPV) has received less attention than their emotional-behavioral outcomes. Drawing upon data from 615 (48.4% female) 10-year-old Australian-born children and their mothers (9.6% of mothers born in non-English speaking countries) participating in a community-based longitudinal study between 2004 and 2016, this study examined the associations between IPV in infancy and cognition in middle childhood (at age 10). Results showed that IPV in the first 12 months of life was associated with lower general cognitive ability and poorer executive attention but not working memory skills. IPV in middle childhood (in the 10th year postpartum) was not associated with cognition. This study provides evidence for the long-term impact of early life exposure to IPV on children's cognition, and points to the importance of early intervention to optimize development. 相似文献
18.
Yuen Mantak Chung Y. B. Lee Queenie A. Y. Lau Patrick S. Y. Chan Raymond M. C. Gysbers Norman C. Shea Peter M. K. 《International Journal for Educational and Vocational Guidance》2020,20(3):653-676
International Journal for Educational and Vocational Guidance - This study provides insights into how Chinese adolescents in Hong Kong interpret the concept of “meaning in life.” Data... 相似文献
19.
20.
Children are capable of viewing object ownership as categorical and exclusive, but ownership claims can also vary by degree. This study investigated how children use these different conceptions of ownership in a giving and a taking task. In two studies, 4- to 7-year olds (N = 105) could give and take craft objects that they or another child had found (weaker claim) and made (stronger claim). In Study 1, no additional ownership information was given, and in Study 2 categorical ownership was stated (“these belong to you”). The results showed that children used categorical ownership for their own objects but used ownership strength for the other child's objects, taking more of the found items. 相似文献