全文获取类型
收费全文 | 1949篇 |
免费 | 19篇 |
国内免费 | 11篇 |
专业分类
教育 | 1176篇 |
科学研究 | 154篇 |
各国文化 | 9篇 |
体育 | 463篇 |
综合类 | 1篇 |
文化理论 | 31篇 |
信息传播 | 145篇 |
出版年
2023年 | 14篇 |
2022年 | 41篇 |
2021年 | 49篇 |
2020年 | 48篇 |
2019年 | 83篇 |
2018年 | 119篇 |
2017年 | 103篇 |
2016年 | 105篇 |
2015年 | 49篇 |
2014年 | 71篇 |
2013年 | 244篇 |
2012年 | 99篇 |
2011年 | 87篇 |
2010年 | 87篇 |
2009年 | 65篇 |
2008年 | 71篇 |
2007年 | 68篇 |
2006年 | 71篇 |
2005年 | 59篇 |
2004年 | 49篇 |
2003年 | 34篇 |
2002年 | 40篇 |
2001年 | 35篇 |
2000年 | 22篇 |
1999年 | 23篇 |
1998年 | 24篇 |
1997年 | 17篇 |
1996年 | 10篇 |
1995年 | 8篇 |
1994年 | 8篇 |
1993年 | 8篇 |
1992年 | 11篇 |
1991年 | 8篇 |
1990年 | 14篇 |
1989年 | 7篇 |
1988年 | 8篇 |
1987年 | 5篇 |
1986年 | 8篇 |
1985年 | 5篇 |
1984年 | 12篇 |
1983年 | 5篇 |
1982年 | 4篇 |
1981年 | 5篇 |
1980年 | 5篇 |
1979年 | 9篇 |
1978年 | 5篇 |
1977年 | 6篇 |
1975年 | 11篇 |
1974年 | 6篇 |
1973年 | 4篇 |
排序方式: 共有1979条查询结果,搜索用时 15 毫秒
81.
82.
83.
84.
85.
Jäger 《Wiener klinische Wochenschrift Education》2007,2(3):195-195
Ohne Zusammenfassung 相似文献
86.
87.
88.
89.
Triin Rääsk Kenn Konstabel Jarek Mäestu Evelin Lätt Toivo Jürimäe Jaak Jürimäe 《Journal of sports sciences》2015,33(16):1649-1657
We examined the tracking of physical activity (PA) measured by accelerometers and subjective self- and parental reports in normal weight and overweight and obese pubertal boys over two-year period. In total, 156 boys with mean (±SD) age of 11.53 ± 0.76 at baseline and with mean age of 13.94 ± 0.74 at 2 year follow-up were studied. At baseline and approximately two years later, the boys completed self-report questionnaire and wore an accelerometer for seven consecutive days. On the basis of first year assessment’s body mass index (BMI), the children were grouped as normal weight and overweight and obese groups according to BMI cut-offs. Tracking correlations of objectively measured PA and subjectively measured PA were fairly similar across the 12–14 year-old-boys weight groups over two year period. Tracking correlations of objectively measured PA and subjectively measured PA were not significantly different over two-year period between both BMI groups. The results of the study show that pubertal boys objectively measured PA decreased over two-year period and so the boys started to be less active in their pubertal period. 相似文献
90.
This paper describes a newly adapted instrument for measuring novice-to-expert-like perceptions about biology: the Colorado Learning Attitudes about Science Survey for Biology (CLASS-Bio). Consisting of 31 Likert-scale statements, CLASS-Bio probes a range of perceptions that vary between experts and novices, including enjoyment of the discipline, propensity to make connections to the real world, recognition of conceptual connections underlying knowledge, and problem-solving strategies. CLASS-Bio has been tested for response validity with both undergraduate students and experts (biology PhDs), allowing student responses to be directly compared with a consensus expert response. Use of CLASS-Bio to date suggests that introductory biology courses have the same challenges as introductory physics and chemistry courses: namely, students shift toward more novice-like perceptions following instruction. However, students in upper-division biology courses do not show the same novice-like shifts. CLASS-Bio can also be paired with other assessments to: 1) examine how student perceptions impact learning and conceptual understanding of biology, and 2) assess and evaluate how pedagogical techniques help students develop both expertise in problem solving and an expert-like appreciation of the nature of biology. 相似文献