全文获取类型
| 收费全文 | 1726篇 |
| 免费 | 34篇 |
| 国内免费 | 3篇 |
专业分类
| 教育 | 1300篇 |
| 科学研究 | 97篇 |
| 各国文化 | 23篇 |
| 体育 | 160篇 |
| 文化理论 | 12篇 |
| 信息传播 | 171篇 |
出版年
| 2023年 | 7篇 |
| 2022年 | 7篇 |
| 2021年 | 17篇 |
| 2020年 | 41篇 |
| 2019年 | 60篇 |
| 2018年 | 67篇 |
| 2017年 | 96篇 |
| 2016年 | 75篇 |
| 2015年 | 60篇 |
| 2014年 | 56篇 |
| 2013年 | 390篇 |
| 2012年 | 59篇 |
| 2011年 | 55篇 |
| 2010年 | 37篇 |
| 2009年 | 50篇 |
| 2008年 | 49篇 |
| 2007年 | 43篇 |
| 2006年 | 40篇 |
| 2005年 | 28篇 |
| 2004年 | 31篇 |
| 2003年 | 14篇 |
| 2002年 | 34篇 |
| 2001年 | 19篇 |
| 2000年 | 30篇 |
| 1999年 | 14篇 |
| 1998年 | 17篇 |
| 1997年 | 22篇 |
| 1996年 | 26篇 |
| 1995年 | 22篇 |
| 1994年 | 28篇 |
| 1993年 | 21篇 |
| 1992年 | 10篇 |
| 1991年 | 10篇 |
| 1990年 | 14篇 |
| 1989年 | 11篇 |
| 1988年 | 12篇 |
| 1987年 | 10篇 |
| 1986年 | 14篇 |
| 1985年 | 13篇 |
| 1984年 | 11篇 |
| 1983年 | 13篇 |
| 1982年 | 10篇 |
| 1981年 | 10篇 |
| 1980年 | 10篇 |
| 1979年 | 12篇 |
| 1978年 | 14篇 |
| 1976年 | 8篇 |
| 1975年 | 8篇 |
| 1973年 | 5篇 |
| 1971年 | 6篇 |
排序方式： 共有1763条查询结果，搜索用时 31 毫秒
991.
992.
993.
994.
995.
Brian Booth 《Higher Education Quarterly》1989,43(4):278-288
What is ‘quality’ and how should it be handled by a funding body? This article discusses the practical implications of concern for quality in the PCFC sector of higher education, the role of institutions and of external agencies other than the PCFC. It concludes by offering advice to the PCFC on its policies towards the preservation and enhancement of quality. 相似文献
996.
997.
998.
999.
Visual acuity for single lines as a function of hue and age 总被引：2，自引：0，他引：2
176 students in grades 2-12 were tested for visual acuity as a function of minimally resolvable red, yellow, green, and blue lines. A 3-way mixed analysis of variance revealed significant differences among the colors, with better acuity for longer wavelengths. Significant age effects as well as a sex X condition interaction were also found. Post hoc analysis revealed a significant quartic trend for age. It is argued that the differential acuity thresholds for hue and the curvilinear age trend may depend upon the coordination of the accommodation and refractive power of the eye, which are affected by differential growth rates of the lens and the axial length of the eye. 相似文献
1000.
As a wide range of values has been reported for the relative energetics of 400-m and 800-m track running events, this study aimed to quantify the respective aerobic and anaerobic energy contributions to these events during track running. Sixteen trained 400-m (11 males, 5 females) and 11 trained 800-m (9 males, 2 females) athletes participated in this study. The participants performed (on separate days) a laboratory graded exercsie test and multiple race time-trials. The relative energy system contribution was calculated by multiple methods based upon measures of race VO2, accumulated oxygen deficit (AOD), blood lactate and estimated phosphocreatine degradation (lactate/PCr). The aerobic/anaerobic energy system contribution (AOD method) to the 400-m event was calculated as 41/59% (male) and 45/55% (female). For the 800-m event, an increased aerobic involvement was noted with a 60/40% (male) and 70/30% (female) respective contribution. Significant (P < 0.05) negative correlations were noted between race performance and anaerobic energy system involvement (lactate/PCr) for the male 800-m and female 400-m events (r = - 0.77 and - 0.87 respectively). These track running data compare well with previous estimates of the relative energy system contributions to the 400-m and 800-m events. Additionally, the relative importance and speed of interaction of the respective metabolic pathways has implications to training for these events. 相似文献