全文获取类型
收费全文 | 1172篇 |
免费 | 28篇 |
专业分类
教育 | 1010篇 |
科学研究 | 30篇 |
各国文化 | 22篇 |
体育 | 46篇 |
综合类 | 2篇 |
文化理论 | 6篇 |
信息传播 | 84篇 |
出版年
2023年 | 8篇 |
2022年 | 8篇 |
2021年 | 19篇 |
2020年 | 20篇 |
2019年 | 30篇 |
2018年 | 63篇 |
2017年 | 63篇 |
2016年 | 60篇 |
2015年 | 28篇 |
2014年 | 36篇 |
2013年 | 317篇 |
2012年 | 41篇 |
2011年 | 34篇 |
2010年 | 29篇 |
2009年 | 27篇 |
2008年 | 37篇 |
2007年 | 31篇 |
2006年 | 26篇 |
2005年 | 35篇 |
2004年 | 28篇 |
2003年 | 15篇 |
2002年 | 18篇 |
2001年 | 18篇 |
2000年 | 17篇 |
1999年 | 14篇 |
1998年 | 12篇 |
1997年 | 10篇 |
1996年 | 15篇 |
1995年 | 11篇 |
1994年 | 9篇 |
1993年 | 8篇 |
1992年 | 7篇 |
1991年 | 11篇 |
1990年 | 6篇 |
1989年 | 7篇 |
1988年 | 8篇 |
1987年 | 6篇 |
1986年 | 6篇 |
1985年 | 3篇 |
1984年 | 5篇 |
1983年 | 5篇 |
1982年 | 6篇 |
1981年 | 3篇 |
1980年 | 3篇 |
1979年 | 4篇 |
1978年 | 7篇 |
1977年 | 3篇 |
1975年 | 4篇 |
1971年 | 4篇 |
1968年 | 2篇 |
排序方式: 共有1200条查询结果,搜索用时 203 毫秒
41.
Meyer F O'Connor H Shirreffs SM;International Association of Athletics Federations 《Journal of sports sciences》2007,25(Z1):S73-S82
Athletics is a popular sport among young people. To maintain health and optimize growth and athletic performance, young athletes need to consume an appropriate diet. Unfortunately, the dietary intake of many young athletes follows population trends rather than public health or sports nutrition recommendations. To optimize performance in some disciplines, young athletes may strive to achieve a lower body weight or body fat content and this may increase their risk for delayed growth and maturation, amenorrhoea, reduced bone density, and eating disorders. Although many of the sports nutrition principles identified for adults are similar to those for young athletes, there are some important differences. These include a higher metabolic cost of locomotion and preferential fat oxidation in young athletes during exercise. Young athletes, particularity children, are at a thermoregulatory disadvantage due to a higher surface area to weight ratio, a slower acclimatization, and lower sweating rate. An appropriate dietary intake rather than use of supplements (except when clinically indicated) is recommended to ensure young athletes participate fully and safely in athletics. 相似文献
42.
O'Connor H Olds T Maughan RJ;International Association of Athletics Federations 《Journal of sports sciences》2007,25(Z1):S49-S60
Evidence of the importance of physique in the athletics disciplines is supported by the persistence of certain characteristics over long periods, despite marked secular changes in the source population. These characteristics may also result in physiological benefits such as effective thermoregulation or a greater power-to-weight ratio. Coaches and athletes are often convinced of weight or fat loss benefits based on personal or anecdotal experience, intuition, and "trained eye" observation of successful competitors. This may entice athletes into adopting unbalanced, erratic or highly restrictive eating patterns that increase the risk for nutrient deficiencies, and disordered eating. Despite heavy training loads and often extreme diets, some athletes fall short of their physique goals as ultimately phenotype is under genetic control. Professionals assisting athletes with physique management need to be highly skilled in anthropometry and require a thorough understanding of sports-specific nutrition requirements. Careful assessment of the risks and benefits of various approaches to weight and fat loss is required before they are recommended to athletes. 相似文献
43.
Christopher F. Sharpley Geraldine M. Parsons Helen Tillinh 《Psychology in the schools》1989,26(4):411-414
The effects of three routine classroom tasks upon heart rate reactivity were investigated with a sample of 30 typical fifth-grade children. Instructions for a mental arithmetic task, the mental arithmetic task itself, and silent reading were administered under standardized conditions, with a reward being offered for performance on the mental arithmetic task to enhance competition. Heart rate was individually monitored each second during these tasks, and data were collected on mental arithmetic performance and reading ability. Results indicated that some children showed large increases in their heart rates during the three tasks, and that these children should be considered as at-risk in terms of their cardiac health. 相似文献
44.
The Phonological Processing Deficit (PPD) hypothesis remains the most influential theory to explain why some children fail to acquire appropriate reading skills. However, current research suggests that there may be other deficits operating, and that the phonological processing deficit may be just one manifestation of a deeper underlying anatomical syndrome that originates in the cerebellar or vestibular areas of the brain. Claims that exercise regimes or programmes of vestibular stimulation may provide a ‘cure’ for developmental dyslexia (specific reading difficulties) prompt scepticism among the scientific community and raise concerns about the exploitation of vulnerable parents. The paper provides a review of research into the causes of specific reading difficulties at the behavioural, cognitive and biological level of explanation, and considers whether or not there is any theoretical basis for the use of exercise-based intervention programmes. Following consideration of recent findings from a range of scientific disciplines, it is concluded that such ‘unconventional’ methods of intervention may draw some theoretical support from the scientific literature, although researchers are cautioned to be wary of comorbidity issues. It is also concluded that more rigorous and independent evaluations of the success (or otherwise) of exercise-based interventions are needed. 相似文献
46.
47.
ABSTRACT This paper investigates the linkages between management processes and the curriculum using an academically effective secondary school as a case study. The aims of the study are twofold. First, in view of the acknowledged importance governments and others place on the quality of school leadership and management on the one hand and curriculum, teaching and learning reforms on the other, there is a need for empirical data as to how school leaders and managers work to secure improvements in curriculum, teaching and learning. This study purports to provide such data. The second aim acknowledges the need to develop conceptual frameworks and data collection instruments as aids to better understanding of complex relationships within school organizations.two deputy principals do play an indirect and important part in promoting academic performance by reinforcing school values in a wide variety of ways. Third, curriculum management is the responsibility of senior teachers and there is tight linkage between both senior teachers and teachers and high quality teaching and learning. Finally, the loose linkage between departments, and also between departments and senior management, provides little opportunity for a school‐wide approach to curriculum matters. It is evident that a whole‐school curriculum management perspective is absent in this school. 相似文献
48.
49.
50.