全文获取类型
收费全文 | 660篇 |
免费 | 16篇 |
专业分类
教育 | 485篇 |
科学研究 | 17篇 |
各国文化 | 6篇 |
体育 | 106篇 |
综合类 | 1篇 |
文化理论 | 13篇 |
信息传播 | 48篇 |
出版年
2023年 | 7篇 |
2022年 | 14篇 |
2021年 | 17篇 |
2020年 | 31篇 |
2019年 | 46篇 |
2018年 | 65篇 |
2017年 | 55篇 |
2016年 | 40篇 |
2015年 | 31篇 |
2014年 | 38篇 |
2013年 | 165篇 |
2012年 | 26篇 |
2011年 | 17篇 |
2010年 | 9篇 |
2009年 | 11篇 |
2008年 | 10篇 |
2007年 | 5篇 |
2006年 | 10篇 |
2005年 | 8篇 |
2004年 | 5篇 |
2003年 | 5篇 |
2002年 | 6篇 |
2001年 | 2篇 |
2000年 | 2篇 |
1999年 | 6篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1995年 | 5篇 |
1994年 | 3篇 |
1993年 | 2篇 |
1992年 | 2篇 |
1991年 | 1篇 |
1990年 | 2篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1986年 | 2篇 |
1985年 | 1篇 |
1982年 | 2篇 |
1981年 | 1篇 |
1979年 | 2篇 |
1978年 | 3篇 |
1977年 | 2篇 |
1975年 | 2篇 |
1974年 | 2篇 |
1972年 | 2篇 |
1971年 | 2篇 |
1970年 | 4篇 |
1963年 | 1篇 |
排序方式: 共有676条查询结果,搜索用时 265 毫秒
61.
Luiz Rodrigo Augustemak de Lima Isabela de Carlos Back Everson Araújo Nunes Diego Augusto Santos Silva Edio Luiz Petroski 《Journal of sports sciences》2019,37(1):50-58
This study aimed to investigate if moderate to vigorous physical activity (MVPA) and aerobic fitness are associated with cardiovascular risk factors in HIV+ children and adolescents. Sixty-five children and adolescents (8 to 15 years) provided minutes of MVPA measured by accelerometers and peak oxygen uptake (peak VO2) by breath-by-breath respiratory exchange. Cardiovascular risk factors were characterized by body fat, blood pressure, total cholesterol, HDL-c, LDL-c, triglycerides, glucose, insulin, C-reactive protein (CRP), interleukin (IL)-6, tumor necrosis factor-alpha (TNF-α) and carotid intima-media thickness. Results indicated that higher MVPA was associated with lower values of total (β = ?3.566) and trunk body fat (β = ?3.495), total cholesterol (β = ?0.112) and LDL-c (β = ?0.830). Likewise, higher peak VO2 was associated with lower total (β = ?0.629) and trunk body fat values (β = ?0.592) and levels of CRP (β = ?0.059). The physically active participants had lower total cholesterol (?24.4 mg.dL?1) and LDL-c (?20.1 mg.dL?1) compared to participants judged to be insufficiently active. Moreover, participants with satisfactory peak VO? showed lower total (?4.1%) and trunk (?4.3%) body fat, CRP (?2.3 mg.L?1), IL-6 (?2.4 pg.mL?1) and TNF-α (?1.0 pg.mL?1) compared to low peak VO2 peers. High levels of MVPA and aerobic fitness may prevent developing of cardiovascular risk factors in children and adolescents HIV+. 相似文献
62.
Alberto Fílter Jesús Olivares Alfredo Santalla Fabio Y. Nakamura Irineu Loturco Bernardo Requena 《Journal of sports sciences》2020,38(11-12):1320-1325
ABSTRACT The speed performance is involved not only in linear sprints, but also in a wide spectrum of multi-directional movements, such as curve sprinting. Curved sprint can be defined as sprint with gradual and continuous change of direction (COD). Although ~85% of the actions performed at maximum velocity in a professional soccer league are curvilinear sprints, there is not any specific test to assess this ability. This study aimed to analyse the reliability of a new curve sprint test, and compare its results with those obtained by soccer players in linear sprint. Forty experienced soccer players performed 3 attempts of curve sprint (using the penalty arc) to right and left side (17 m), and 3 linear sprints (17 m) in two different days. The ICCs (inter-session reliability) were 0.93 for sprint curve right side (CSRS) and 0.89 for sprint curve left side (CSLS), considered “acceptable”. The CVs (intra-session reliability) were 0.87% in CSRS and 1.15% in CSLS. The coefficient of determination (R2) between linear and curve sprinting was ~35%. The association between curve sides was “very large” (r = 0.878; p < 0.01). In summary, we showed that “curve sprint test” is highly reliable, and that curvilinear and linear sprints are different and independent actions. 相似文献
63.
This article analyzes the feeling of communities of female social viewers who watch television fiction and participate in social networks and forums dedicated to the programs. The sample is made up of 7,849 comments from 157 platforms (49 Facebook pages, 71 Twitter accounts, and 37 forums). We describe the characteristics of these communities of fans, which differ significantly from cult fandoms and are based on ICT interweaving between reception and female viewers’ daily lives. The results reveal that these active online poster and lurker communities express themselves through their emotional ties with the television series, self-reflection, and the manifestation of intimacy. Identification with the group is based on the relationship of the storylines with their own lives, with no attempts at constructing a cultural or political identity. 相似文献
64.
Libraries continue to be an important source of books for young people, though relatively little is known about how gender and age influence visitation frequency for this purpose. In addition, while supporting children to choose books is part of the role of both school and public librarians, little is known about the strategies and processes children use to select books, and the beliefs and attitudes that underpin them. Findings from the 2016 Western Australian Study in Children's Book Reading offer insights into these areas that can support librarians to guide book choice, and they encourage targeted intervention to ensure that boys and older children make use of their libraries to support their literacy growth. 相似文献
65.
Journal of Mathematics Teacher Education - This paper presents the findings of an empirical research project, designed with a combination of qualitative and quantitative methodology. Our goal was... 相似文献
66.
67.
The use and development of analogical processes in learning to read in Spanish are presented. In the first experiment, the results show that children of 6 years old show analogical effects in reading pseudowords and that the magnitude of this effect is the same as with 10 years old children. However, it is found that children of 10 years old make many lexicalizations when reading pseudowords (about 50% of the items). In experiment 2 this finding is further analyzed. The results show that 9 years old children make more lexicalizations than adult control subjects do. It is suggested that the development of analogical procedures is a fast process (6 years old children already have done it), but that the precise control of lexical information over perceptual one is a later process. 相似文献
68.
69.
Barreto Lucas Passos Rodrigues Adriana Araújo Dutra de Oliveira Giordanna Camilla Bié de Almeida Laila Thayanne Gomes Felix Matheus Augusto Campelo Silva Penha de Souza Quadros Ana Luiza Macedo Andrea Mara Mortimer Eduardo Fleury 《Research in Science Education》2021,51(1):135-152
Research in Science Education - This research draws on Legitimation Code Theory (LCT) to understand the epistemic dimension of the higher education classroom discourse of a professor who is well... 相似文献
70.
Science & Education - In primary and secondary schools, the disciplines encompassed in “STEM”—Science, Technology, Engineering and Mathematics—have usually been studied... 相似文献