全文获取类型
收费全文 | 283篇 |
免费 | 2篇 |
专业分类
教育 | 124篇 |
科学研究 | 56篇 |
各国文化 | 20篇 |
体育 | 33篇 |
文化理论 | 1篇 |
信息传播 | 51篇 |
出版年
2021年 | 5篇 |
2020年 | 2篇 |
2019年 | 6篇 |
2018年 | 5篇 |
2017年 | 4篇 |
2016年 | 10篇 |
2015年 | 9篇 |
2014年 | 8篇 |
2013年 | 80篇 |
2012年 | 5篇 |
2011年 | 10篇 |
2008年 | 2篇 |
2007年 | 3篇 |
2006年 | 3篇 |
2005年 | 4篇 |
2003年 | 2篇 |
2001年 | 4篇 |
2000年 | 5篇 |
1999年 | 3篇 |
1994年 | 3篇 |
1992年 | 3篇 |
1990年 | 2篇 |
1987年 | 2篇 |
1986年 | 3篇 |
1984年 | 3篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1979年 | 3篇 |
1977年 | 2篇 |
1973年 | 1篇 |
1971年 | 2篇 |
1970年 | 4篇 |
1969年 | 4篇 |
1968年 | 6篇 |
1967年 | 5篇 |
1966年 | 5篇 |
1965年 | 2篇 |
1964年 | 3篇 |
1963年 | 1篇 |
1925年 | 1篇 |
1920年 | 1篇 |
1895年 | 1篇 |
1872年 | 2篇 |
1871年 | 4篇 |
1870年 | 5篇 |
1868年 | 14篇 |
1867年 | 10篇 |
1866年 | 3篇 |
1865年 | 5篇 |
1843年 | 1篇 |
排序方式: 共有285条查询结果,搜索用时 31 毫秒
21.
This study reports the results of a needs analysis of literacy programs for a library system serving three rural and suburban
counties. It examines the computing skills and needs of literacy tutors as well as native-speaking and English language learner
(ELL) literacy tutees enrolled in the programs. Paper surveys were mailed to tutors, who were asked to complete a survey themselves
and assist their tutees to complete one. Results of this study offer insights into the incorporation of digital literacy into
traditional adult literacy programs focusing on the needs, wants, and support systems of user groups. 相似文献
22.
To compare the effectiveness of training in heat and in sweat clothing in cool conditions on improving heat tolerance, two groups of active subjects (n = 6 in each) performed an interval running heat-tolerance test before and after a 7-day experimental treatment. On each treatment day the subjects attempted to complete 4 x 15 min interval treadmill running periods (a 7.5 s effort every 30 s, on 15 km h-1, 15% grade; the same exercise format as the heat-tolerance test), which were interspersed with 5-min recovery periods (total time each day = 80 min). Group 1 (heat) ran in shorts, socks and shoes in hot humid conditions, and Group 2 (sweat clothing) ran in cool conditions dressed in shorts, socks and T-shirt covered by a polyester-cotton tracksuit, over which was worn 100% nylon spray-proof pants and jacket (cotton lined) with an acrylic cloth bobble hat (beanie) on the head. Both groups displayed changes typical of heat acclimatization over the 7-day period, with significant decreases in final rectal temperature (Tr) and heart rate (HR) being evident, but no change in sweat loss. Mean skin temperature (Tsk) was similar in both groups during the training sessions (heat group: 34.8-35.7 degrees C; sweat clothing group 34.9-35.5 degrees C). After the heat-tolerance test, both groups had significantly lower Tr, Tsk and HR values than before, and sweating sensitivity (g m-2 h-1 degrees C rise in Tr) was significantly increased. There was only one significant difference between the two groups (Tsk, 20th min value). It was concluded that training in sweat clothing in cool conditions can provide the same improvements in heat tolerance as training in hot humid conditions where a fixed exercise intensity and duration are used. 相似文献
23.
24.
25.
26.
27.
Morton RH 《Journal of sports sciences》2005,23(5):549-557
The basic anatomy of an experimental design is used as an expository introduction to the examination of several repeated measures experiments described in recent pages of this and other journals. This examination reveals problematic issues concerning some common design and analysis features of such experimental designs. In particular, the hierarchical structures and/or presence of time trends is highlighted. These issues are discussed in an attempt to assist researchers to recognize such problems, to avoid the associated difficulties in the future, and to exploit the advantages of sound design with appropriate, efficient and informative analysis. While alternate reanalyses of the data of these experiments might reveal the conclusions to be unaffected by such issues, researchers should still be cautious. In retrospect, such occurrences should be seen as fortuitous, not as justification for inefficient or less informative analyses. More importantly, such reanalyses could reveal more enlightening information, and I argue that if a design permits such information to be discovered, then it behoves researchers to perform such analyses and to make such discoveries. 相似文献
28.
29.
Lack of benefit of warm up on prolonged intermittent-sprint performance has been proposed to be due to use of a pacing strategy by participants. To investigate this, twelve participants performed four cycle trials that consisted of either prolonged intermittent-sprint performance (80 min) or single-sprint performance (4 s), with or without a warm up. The first-sprint of intermittent-sprint performance was also assessed. No interaction effects (P > 0.05) were found between trials for intermittent-sprint performance for total work (J · kg(-1)), or percentage work and power decrement. Work done during the first-sprint of intermittent-sprint performance (no warm up) was less (P < 0.001) than the first-sprint of intermittent-sprint performance (warm up; effect size (ES) = 0.59) and both single-sprint trials (warm up and no warm up; ES = 0.91, 0.75, respectively). Peak power (W · kg(-1)) for single-sprint (warm up) was greater (P < 0.05) than single-sprint (no warm up), and the first-sprint of intermittent-sprint performance (warm up and no warm up). Warm up improved single-sprint performance and the first sprint of intermittent-sprint performance. Use of a pacing strategy probably resulted in similar intermittent-sprint performance between trials. These results suggest that team-sport players should perform a warm up at the start of a game or before substitution during a game. 相似文献
30.