全文获取类型
收费全文 | 13071篇 |
免费 | 202篇 |
国内免费 | 21篇 |
专业分类
教育 | 9066篇 |
科学研究 | 1510篇 |
各国文化 | 125篇 |
体育 | 1151篇 |
综合类 | 6篇 |
文化理论 | 98篇 |
信息传播 | 1338篇 |
出版年
2021年 | 139篇 |
2020年 | 195篇 |
2019年 | 268篇 |
2018年 | 369篇 |
2017年 | 352篇 |
2016年 | 356篇 |
2015年 | 238篇 |
2014年 | 316篇 |
2013年 | 2306篇 |
2012年 | 292篇 |
2011年 | 315篇 |
2010年 | 280篇 |
2009年 | 218篇 |
2008年 | 268篇 |
2007年 | 239篇 |
2006年 | 232篇 |
2005年 | 207篇 |
2004年 | 227篇 |
2003年 | 205篇 |
2002年 | 175篇 |
2001年 | 444篇 |
2000年 | 291篇 |
1999年 | 253篇 |
1998年 | 118篇 |
1997年 | 155篇 |
1996年 | 132篇 |
1995年 | 123篇 |
1994年 | 141篇 |
1993年 | 98篇 |
1992年 | 167篇 |
1991年 | 173篇 |
1990年 | 178篇 |
1989年 | 183篇 |
1988年 | 154篇 |
1987年 | 153篇 |
1986年 | 153篇 |
1985年 | 194篇 |
1984年 | 150篇 |
1983年 | 126篇 |
1982年 | 120篇 |
1981年 | 113篇 |
1980年 | 107篇 |
1979年 | 154篇 |
1978年 | 119篇 |
1977年 | 106篇 |
1976年 | 77篇 |
1975年 | 104篇 |
1974年 | 95篇 |
1973年 | 101篇 |
1971年 | 85篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
101.
William J. Therrien Jonte C. Taylor John L. Hosp Erica R. Kaldenberg Jay Gorsh 《Learning disabilities research & practice》2011,26(4):188-203
Although science has received much attention as a political and educational initiative, students with learning disabilities (LD) perform significantly lower than their nondisabled peers. This meta‐analysis evaluates the effectiveness of instructional strategies in science for students with LD. Twelve studies were examined, summarized, and grouped according to the type of strategy implemented. Effect sizes (ES) were calculated for each study. Across all studies, a mean ES of .78 was obtained, indicating a moderate positive effect on students with LD science achievement. Findings also align with past reviews of inquiry‐based instruction for students with special needs, indicating that students with LD need structure within an inquiry science approach in order to be successful. Additionally, results suggest that mnemonic instruction is highly effective at increasing learning disabled students' acquisition and retention of science facts. 相似文献
102.
103.
104.
105.
Alan M. Schwitzer Shana Pribesh Amanda Ellis‐O'Quinn Patricia B. Huber Elizabeth C. Wilmer 《Journal of College Counseling》2016,19(1):76-95
This article focuses on counseling research in the community college context. The article suggests the need for a robust community college knowledge base, describes some limitations of the current community college literature, and suggests a framework for more effective work in this area. The authors’ own experiences and selected examples of published studies are used as illustrations of the hurdles encountered and solutions available when examining counseling theories, practices, and outcomes in 2‐year settings. 相似文献
106.
Joshua T. Weinhandl Bobbie S. Irmischer Zachary A. Sievert Kevin C. Fontenot 《Journal of sports sciences》2017,35(2):166-174
Limb dominance theory suggests that females tend to be more one-leg dominant and exhibit greater kinematic and kinetic leg asymmetries than their male counterparts, contributing to the increased risk of anterior cruciate ligament injury among female athletes. Thus, the purpose of this study was to examine the influences of sex and limb dominance on lower extremity joint mechanics during unilateral land-and-cut manoeuvres. Twenty-one women and 21 men completed land-and-cut manoeuvres on their dominant limb as well as their nondominant limb. Three-dimensional kinematics and kinetics were calculated bilaterally for the entire stance phase of the manoeuvre. Women performed land-and-cut manoeuvres with altered hip motions and loads as well as greater knee abduction at touchdown compared to men. Dominant limb land-and-cut manoeuvres where characterised by decreased hip flexion at touchdown as well as decreased hip flexion and adduction range of motion compared to nondominant land-and-cuts regardless of sex. The observed sex differences are consistent with previous research regarding mechanisms underlying the sex disparity in anterior cruciate ligament injury rates. However, observed differences regarding limb dominances appear somewhat arbitrary and did not suggest that the dominant or nondominant limb would be at increased risk of anterior cruciate ligament injury. 相似文献
107.
C. A. L. Miles S. J. Vine J. N. Vickers M. R. Wilson 《European Journal of Sport Science》2017,17(1):100-108
AbstractQuiet eye training (QET) may be a more effective method for teaching children to catch than traditional training (TT) methods, but it is unclear if the benefits accrued persist in the long term. Thirty children were randomly allocated into a QET or TT group and, while wearing a mobile eye tracker, underwent baseline testing, training and two retention tests over a period of eight weeks, using a validated throw and catch task. During training, movement-related information was provided to both groups, while the QET group received additional instruction to increase the duration of their targeting fixation (QE1) on the wall prior to the throw, and pursuit tracking (QE2) period on the ball prior to catching. In both immediate (R1) and delayed (R2, six weeks later) retention tests, the QET group had a significantly longer QE1 duration and an earlier and longer QE2 duration, compared to the TT group, who revealed no improvements. A performance advantage was also found for the QET compared to the TT group at both R1 and R2, revealing the relatively robust nature of the visuomotor alterations. Regression analyses suggested that only the duration of QE1 predicted variance in catch success post-training, pointing to the importance of a pre-programming visuomotor strategy for successful throw and catch performance. 相似文献
108.
Thomas A. C. Reydon 《Metascience》2015,24(2):259-264
109.
C. Wesley Buerkle 《Communication Teacher》2017,31(1):47-61
This experimental study examines an online module designed to increase student competence in oral citation behavior using a mastery training strategy. Students in the experimental condition provided complete citations at a higher rate and provided more citation information for traditional and web-based sources compared with a control group without required training. Although subjective norms set by instructors also influence citation behavior, the general trend depicted was that students completing the required module training performed more complete citations. Implications for student learning, mastery instruction, and course assessment were considered to be generally beneficial and at minimal cost. 相似文献
110.
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