全文获取类型
收费全文 | 19616篇 |
免费 | 294篇 |
国内免费 | 56篇 |
专业分类
教育 | 14561篇 |
科学研究 | 1326篇 |
各国文化 | 220篇 |
体育 | 1404篇 |
综合类 | 44篇 |
文化理论 | 106篇 |
信息传播 | 2305篇 |
出版年
2022年 | 114篇 |
2021年 | 206篇 |
2020年 | 272篇 |
2019年 | 433篇 |
2018年 | 575篇 |
2017年 | 642篇 |
2016年 | 584篇 |
2015年 | 381篇 |
2014年 | 533篇 |
2013年 | 4051篇 |
2012年 | 506篇 |
2011年 | 527篇 |
2010年 | 466篇 |
2009年 | 462篇 |
2008年 | 489篇 |
2007年 | 459篇 |
2006年 | 475篇 |
2005年 | 418篇 |
2004年 | 299篇 |
2003年 | 300篇 |
2002年 | 287篇 |
2001年 | 424篇 |
2000年 | 344篇 |
1999年 | 307篇 |
1998年 | 191篇 |
1997年 | 182篇 |
1996年 | 205篇 |
1995年 | 178篇 |
1994年 | 184篇 |
1993年 | 177篇 |
1992年 | 269篇 |
1991年 | 251篇 |
1990年 | 266篇 |
1989年 | 249篇 |
1988年 | 205篇 |
1987年 | 212篇 |
1986年 | 210篇 |
1985年 | 207篇 |
1984年 | 203篇 |
1983年 | 184篇 |
1982年 | 162篇 |
1981年 | 158篇 |
1980年 | 149篇 |
1979年 | 212篇 |
1978年 | 187篇 |
1977年 | 132篇 |
1976年 | 143篇 |
1975年 | 124篇 |
1973年 | 114篇 |
1971年 | 122篇 |
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
121.
122.
123.
Leonardo S. Fortes Dalton De Lima-Junior Lenamar Fiorese José R. A. Nascimento-Júnior Arnaldo L. Mortatti Maria E. C. Ferreira 《Journal of sports sciences》2020,38(5):552-558
ABSTRACTThe objective of this study was to analyse the effect of the use of social networks in smartphones or playing video games on the passing decision-making performance in professional soccer athletes. Participants were 25 male professional soccer athletes (mean ± SD: age 23.4 ± 2.8 years). The participants performed three randomised conditions divided into three groups: control (CON), smartphone (SMA), and video game (VID). Before and after each experimental condition, the Stroop Task assessed the level of induced mental fatigue. Then, the athletes performed a simulated soccer match. A CANON® camera recorded the matches for further analysis on passing decision-making performance. A group effect was identified (p < .01) with impairment on passing decision-making performance for the SMA (p = .01, ES = 0.5) and VID (p = .01, ES = 0.5) conditions. We concluded that the use of social networks on smartphones and/or playing video games right before official soccer matches might impair the passing decision-making performance in professional soccer athletes. 相似文献
124.
Annie Dupuis Maheshan Indralingam Andre Chevrier Jennifer Crosbie Paul Arnold Christie L. Burton Russell Schachar 《Child development》2019,90(2):e263-e272
Adjusting speed to maintain fast and accurate performance is critical to goal-directed behavior. This study examined development of response time adjustments in the stop signal task in 13,709 individuals aged 6–17 years (49.0% Caucasian) across four trial types: correct and incorrect go, successful (stop-inhibit), and failed (stop-respond) trials. People sped more after correct than incorrect go responses and slowed more after failed than successful stop trials. Greater slowing after stop-respond but less slowing after stop-inhibit trials was associated with better response inhibition. Response time adjustments were evident in children as young as age 6, developed throughout childhood, and plateaued by age 10. Results were consistent with the predictions of the error detection and shifting goal priority hypotheses for adjustments. 相似文献
125.
126.
127.
Danica G. Hays Rebecca E. Michel Hannah B. Bayne Anita A. Neuer Colburn Jayne Smith Myers 《Journal of College Counseling》2015,18(1):49-65
Relationship violence is a salient concern on college campuses today, and psychoeducational groups may be an appropriate prevention format. This article describes a study measuring the impact of college student participation in the HEART (Help End Abusive Relationships Today) program, a series of group sessions designed to increase knowledge and awareness of relationship violence. Findings indicated significant changes for group participants postintervention. Implications and recommendations for college counselors are discussed. 相似文献
128.
Qingli Lei Rose A. Mason Yan Ping Xin John L. Davis Marie David Catharine Lory 《Learning disabilities research & practice》2020,35(4):201-217
This single-case meta-analysis is the first to provide a quantitative synthesis of the published literature on mathematics word problem-solving intervention studies for English learners with learning disabilities and mathematics difficulties. A total of ten single-subject studies were included for analysis. The current study investigated the magnitude of the effect of mathematics interventions targeting the improvement of students’ mathematics word problem-solving performance, and analyzed variables that moderated this effect. Results indicate a moderate overall effect size of 0.81 (95% CI [0.71, 0.90]) on word problem-solving performance for English learners with learning disabilities and mathematics difficulties. Moderator variables such as the implementer of the interventions, instructional focus, and word problem-solving content significantly moderated the mathematics intervention effects. 相似文献
129.
Georga J. Longhurst Danya M. Stone Kate Dulohery Deirdre Scully Thomas Campbell Claire F. Smith 《Anatomical sciences education》2020,13(3):301-311
The Covid-19 pandemic has driven the fastest changes to higher education across the globe, necessitated by social distancing measures preventing face-to-face teaching. This has led to an almost immediate switch to distance learning by higher education institutions. Anatomy faces some unique challenges. Intrinsically, anatomy is a three-dimensional subject that requires a sound understanding of the relationships between structures, often achieved by the study of human cadaveric material, models, and virtual resources. This study sought to identify the approaches taken in the United Kingdom and Republic of Ireland to deliver anatomical education through online means. Data were collected from 14 different universities in the United Kingdom and Republic of Ireland and compared adopting a thematic analysis approach. Once themes were generated, they were collectively brought together using a strength, weakness, opportunity, threat (SWOT) analysis. Key themes included the opportunity to develop new online resources and the chance to engage in new academic collaborations. Academics frequently mentioned the challenge that time constrains could place on the quality and effectiveness of these resources; especially as in many cases the aim of these resources was to compensate for a lack of exposure to cadaveric exposure. Comparisons of the actions taken by multiple higher education institutions reveal the ways that academics have tried to balance this demand. Discussions will facilitate decisions being made by higher education institutions regarding adapting the curriculum and assessment methods in anatomy. 相似文献
130.
We present a variant of the Game of Pig to introduce the concepts of probability, simulation and expected value. 相似文献