全文获取类型
收费全文 | 33164篇 |
免费 | 273篇 |
国内免费 | 14篇 |
专业分类
教育 | 24318篇 |
科学研究 | 3299篇 |
各国文化 | 129篇 |
体育 | 1956篇 |
综合类 | 10篇 |
文化理论 | 515篇 |
信息传播 | 3224篇 |
出版年
2021年 | 201篇 |
2020年 | 284篇 |
2019年 | 423篇 |
2018年 | 2740篇 |
2017年 | 2658篇 |
2016年 | 2121篇 |
2015年 | 486篇 |
2014年 | 636篇 |
2013年 | 3950篇 |
2012年 | 709篇 |
2011年 | 1298篇 |
2010年 | 1245篇 |
2009年 | 813篇 |
2008年 | 1159篇 |
2007年 | 1534篇 |
2006年 | 519篇 |
2005年 | 717篇 |
2004年 | 788篇 |
2003年 | 640篇 |
2002年 | 464篇 |
2001年 | 491篇 |
2000年 | 468篇 |
1999年 | 424篇 |
1998年 | 215篇 |
1997年 | 290篇 |
1996年 | 272篇 |
1995年 | 245篇 |
1994年 | 226篇 |
1993年 | 227篇 |
1992年 | 369篇 |
1991年 | 323篇 |
1990年 | 308篇 |
1989年 | 369篇 |
1988年 | 355篇 |
1987年 | 291篇 |
1986年 | 304篇 |
1985年 | 313篇 |
1984年 | 260篇 |
1983年 | 313篇 |
1982年 | 221篇 |
1981年 | 223篇 |
1980年 | 211篇 |
1979年 | 319篇 |
1978年 | 240篇 |
1977年 | 220篇 |
1976年 | 200篇 |
1975年 | 175篇 |
1974年 | 171篇 |
1973年 | 173篇 |
1971年 | 145篇 |
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
201.
202.
203.
204.
205.
David Ansong Sarah R. Eisensmith Rainier D. Masa Gina A. Chowa 《Psychology in the schools》2016,53(10):1057-1070
Self‐efficacy is a universal construct, but few validated measures exist for researchers in developing countries to use in assessing youths’ perceptions of their ability to achieve academic success. This study examined the cross‐cultural suitability and psychometric properties of an academic self‐efficacy scale (ASES) adapted for the Ghanaian context. ASES construct validity was assessed with a sample of 4,289 Ghanaian junior high‐school students and exploratory and confirmatory factor analysis. Invariance testing assessed the scale's measurement equivalence by gender and temporal stability of gender equivalence. The ASES is a valid, reliable one‐dimensional scale for assessing young Ghanaians’ perceptions of their academic capabilities, and it works equally well across genders. As adapted, ASES is a valid scale with utility for researchers examining predictors and effects of academic self‐efficacy. The ASES has important implications for decisions regarding investment in programs aimed at improving academic self‐efficacy of youth, both in sub‐Saharan Africa and the increasingly diverse American public schools. 相似文献
206.
207.
Rebecca A. Battista Erin D Bouldin Karin A. Pfeiffer Christine E. Pacewicz Shannon R Siegel Eric M. Martin 《Measurement in physical education and exercise science》2021,25(1):43-52
ABSTRACT Participation in youth sport is positively associated with physical fitness and performance. The purpose of the current study was to examine if physical fitness measures during childhood and early adolescence predicted high school sport participation. Participants included youth in the Michigan State University Motor Performance Study. Measures consisted of the endurance shuttle run, Wells sit-and-reach, jump and reach, standing long jump, agility shuttle run and 30-yard dash. Individual, generalized estimating equation models were used to estimate the association between each measure and the odds of participating in high school sport. For both sexes, the endurance shuttle run and agility shuttle run were related to sport participation. For boys only, the long jump and 30-yard dash were also associated with sport participation. Better physical fitness and performance across several dimensions in childhood, including those related to motor skills, enhanced the likelihood of sport participation in high school. 相似文献
208.
209.
V. V. Arutyunov 《Scientific and Technical Information Processing》2017,44(1):64-68
This article considers the dynamics and specifics of training highly qualified scientific staff (philosophy doctors and doctors of sciences) in the field of information security and data protection in a 10-year period of 2004–2013 in basic research specialties as classified by the Higher Attestation Commission (VAC) of the Ministry of Education and Science of the Russian Federation. 相似文献
210.