全文获取类型
收费全文 | 1720篇 |
免费 | 27篇 |
专业分类
教育 | 1368篇 |
科学研究 | 66篇 |
各国文化 | 22篇 |
体育 | 104篇 |
综合类 | 1篇 |
文化理论 | 7篇 |
信息传播 | 179篇 |
出版年
2023年 | 10篇 |
2022年 | 13篇 |
2021年 | 21篇 |
2020年 | 35篇 |
2019年 | 70篇 |
2018年 | 77篇 |
2017年 | 90篇 |
2016年 | 84篇 |
2015年 | 57篇 |
2014年 | 69篇 |
2013年 | 379篇 |
2012年 | 45篇 |
2011年 | 47篇 |
2010年 | 31篇 |
2009年 | 41篇 |
2008年 | 38篇 |
2007年 | 40篇 |
2006年 | 44篇 |
2005年 | 34篇 |
2004年 | 34篇 |
2003年 | 27篇 |
2002年 | 25篇 |
2001年 | 40篇 |
2000年 | 26篇 |
1999年 | 25篇 |
1998年 | 17篇 |
1997年 | 37篇 |
1996年 | 20篇 |
1995年 | 20篇 |
1994年 | 15篇 |
1993年 | 15篇 |
1992年 | 17篇 |
1991年 | 17篇 |
1990年 | 17篇 |
1989年 | 17篇 |
1988年 | 11篇 |
1987年 | 9篇 |
1986年 | 18篇 |
1985年 | 14篇 |
1984年 | 13篇 |
1983年 | 5篇 |
1982年 | 5篇 |
1981年 | 10篇 |
1980年 | 10篇 |
1979年 | 6篇 |
1978年 | 5篇 |
1976年 | 7篇 |
1975年 | 5篇 |
1974年 | 5篇 |
1973年 | 5篇 |
排序方式: 共有1747条查询结果,搜索用时 31 毫秒
12.
13.
Alexandra Avloniti Ioannis G. Fatouros Maria Protopapa Ioannis Athanailidis Christina Avloniti 《European Journal of Sport Science》2016,16(4):402-408
Although static stretching (SS) is utilized during warm-up before training and competition, the results about its effects on performance remain controversial. We examined whether performing a stretch of short-to-moderate duration (<60 sec) in a single repetition produces a similar or different effect on speed and agility performance from the effect which is produced while performing the same stretch in multiple repetitions of the same total duration. According to a repeated measurement design, 40 trained males were randomly assigned to either (1) a single repetition group or (2) a multiple repetition group. The participants in each group performed five trials: a control trial (no stretches were performed) and four experimental trials of SS protocols consisting of five exercises performed at either 20 sec (2 × 10 in the second group), 30 sec (3 × 10 in the second group), 40 sec (4 × 10 in the second group) or 60 sec (6 × 10 in the second group) of total duration. A two-way repeated measures analysis of variance showed that the participants in both group improved their speed performance in response to the 20-sec trial, whereas agility remained unaffected. Data analysis also revealed that the repetition number did not affect speed and agility performance. These data suggest that SS of short duration (<30 sec) may actually improve acute speed performance, whereas SS of moderate duration may not hamper speed and agility performance. Moreover, the effects of SS protocols are related to the total duration of each exercise and not to the number of repetitions in which each exercise is performed. 相似文献
14.
Martin Weiss Alexandra Newman Ceri Whitmore Stephan Weiss 《European Journal of Sport Science》2016,16(4):393-401
Sprint and distance running have experienced remarkable performance improvements over the past century. Attempts to forecast running performances share an almost similarly long history but have relied so far on relatively short data series. Here, we compile a comprehensive set of season-best performances for eight Olympically contested running events. With this data set, we conduct (1) an exponential time series analysis and (2) a power-law experience curve analysis to quantify the rate of past performance improvements and to forecast future performances until the year 2100. We find that the sprint and distance running performances of women and men improve exponentially with time and converge at yearly rates of 4% ± 3% and 2% ± 2%, respectively, towards their asymptotic limits. Running performances can also be modelled with the experience curve approach, yielding learning rates of 3% ± 1% and 6% ± 2% for the women's and men's events, respectively. Long-term trends suggest that: (1) women will continue to run 10–20% slower than men, (2) 9.50 s over 100 m dash may only be broken at the end of this century and (3) several middle- and long-distance records may be broken within the next two to three decades. The prospects of witnessing a sub-2 hour marathon before 2100 remain inconclusive. Our results should be interpreted cautiously as forecasting human behaviour is intrinsically uncertain. The future season-best sprint and distance running performances will continue to scatter around the trends identified here and may yield unexpected improvements of standing world records. 相似文献
15.
This article presents early evaluation data on the effectiveness of an ethics-based sex education program, the Sexual Ethics for a Caring Society Curriculum (SECS-C), which strives to develop adolescents’ thinking about sex so that they might act ethically in relation to other people and reflect ethically upon sexual messages and events in the world around them. Unlike typical evidence-based curricula that measure prevention goals from a health perspective, effectiveness was measured in terms of attitude change. Seventy-nine 9th graders from 7 diverse classrooms at a charter school received 8 lessons from the curriculum. Pre and post measures assessed belief in rape myths (the Illinois Rape Myth Acceptance Scale) and bystanderism (the Bystander Attitude Scale, Revised (BAS-R)). The students showed improvements with regard to rape myth attitudes but not with regard to their beliefs in the likelihood of intervening in troublesome sexual situations. 相似文献
16.
17.
Sharon Raver Robert C. Dwyer 《International Journal of Disability, Development & Education》1986,33(1):65-72
This paper documents the effectiveness of a substitute activity in decreasing the frequency of eye poking in a 3‐year‐old nonretarded visually impaired child who was involved in a highly participatory, full‐day reading program with four sighted classmates. Following 49 days of training, eye poking had been eliminated, and the subject was able to read 25 word cards. Elements to consider when selecting a substitute activity to interrupt an established self‐stimulating behaviour such as eye poking are discussed. 相似文献
18.
The purpose of this study was to investigate what factors influenced students to enter the field of school psychology. Although numerous studies have documented the thoughts and perspectives of practitioners regarding why they have chosen to become school psychologists, attempts to recruit and retain an adequate number of school psychology practitioners and researchers have shown limited success. A national sample of 307 school psychology graduate students responded to a survey designed to measure issues related to the current state of professional practice, the influence of parental education, and professional organization recruitment. Results indicated that working with children and personal experiences within the school system were highly related to participant's decisions to become school psychologists. In addition, doctoral level and nondoctoral level students present similar reasons for entering the field. This research is discussed in terms of its implications for future research and the current shortage of school psychology practitioners and faculty. © 2007 Wiley Periodicals, Inc. Psychol Schs 44: 865–872, 2007. 相似文献
19.
The Urban Review - This article explores a 9-month process of youth research capacity-building, beginning with the training of high school and college aged researchers in qualitative methodologies... 相似文献
20.
Horowitz A 《Learning & behavior》2011,39(4):314-317
In line with other research, Udell, Dorey, and Wynne’s (in press) finding that dogs and wolves pass on some trials of a putative
theory-of-mind test and fail on others is as informative about the methods and concepts of the research as about the subjects.
This commentary expands on these points. The intertrial differences in the target article demonstrate how critical the choice
of cues is in experimental design; the intersubject-group differences demonstrate how life histories can interact with experimental
design. Even the best-designed theory-of-mind tests have intractable logical problems. Finally, these and previous research
results call for the introduction of an intermediate stage of ability, a rudimentary theory of mind, to describe subjects’ performance. 相似文献