全文获取类型
收费全文 | 1017篇 |
免费 | 25篇 |
专业分类
教育 | 839篇 |
科学研究 | 28篇 |
各国文化 | 12篇 |
体育 | 39篇 |
文化理论 | 10篇 |
信息传播 | 114篇 |
出版年
2023年 | 4篇 |
2022年 | 6篇 |
2021年 | 15篇 |
2020年 | 28篇 |
2019年 | 34篇 |
2018年 | 58篇 |
2017年 | 57篇 |
2016年 | 41篇 |
2015年 | 30篇 |
2014年 | 39篇 |
2013年 | 236篇 |
2012年 | 28篇 |
2011年 | 38篇 |
2010年 | 24篇 |
2009年 | 39篇 |
2008年 | 33篇 |
2007年 | 33篇 |
2006年 | 23篇 |
2005年 | 21篇 |
2004年 | 26篇 |
2003年 | 11篇 |
2002年 | 18篇 |
2001年 | 19篇 |
2000年 | 11篇 |
1999年 | 5篇 |
1998年 | 6篇 |
1997年 | 14篇 |
1996年 | 12篇 |
1995年 | 14篇 |
1994年 | 14篇 |
1993年 | 12篇 |
1992年 | 9篇 |
1991年 | 4篇 |
1990年 | 8篇 |
1989年 | 8篇 |
1988年 | 6篇 |
1987年 | 5篇 |
1985年 | 6篇 |
1984年 | 7篇 |
1983年 | 2篇 |
1982年 | 3篇 |
1981年 | 2篇 |
1979年 | 5篇 |
1978年 | 2篇 |
1977年 | 4篇 |
1975年 | 2篇 |
1974年 | 2篇 |
1973年 | 3篇 |
1971年 | 2篇 |
1967年 | 2篇 |
排序方式: 共有1042条查询结果,搜索用时 15 毫秒
951.
In 2008, the federal government allotted $7 billion in child care subsidies to low-income families through the state-administered Child Care and Development Fund (CCDF), now the government's largest child care program (US DHHS, 2008). Although subsidies reduce costs for families and facilitate parental employment, it is unclear how they impact the quality of care families purchase. This study investigates the impact of government subsidization on parents’ selection of child care quality using multivariate regression and propensity score matching approaches to account for differential selection into subsidy receipt and care arrangements. Data were drawn from the Child Care Supplement to the Fragile Families and Child Wellbeing Study (CCS-FFCWS), conducted in 2002 and 2003 in 14 of the 20 FFCWS cities when focal children were 3 years old (N = 456). Our results indicate that families who used subsidies chose higher quality care than comparable mothers who did not use subsidies, but only because subsidy recipients were more likely to use center-based care. Subgroup analyses revealed that families using subsidies purchased higher-quality home-based care but lower-quality center-based care than comparable non-recipients. Findings suggest that child care subsidies may serve as more than a work support for low-income families by enhancing the quality of nonmaternal care children experience but that this effect is largely attributable to recipients’ using formal child care arrangements (versus kith and kin care) more often than non-recipients. 相似文献
952.
Lynne Marie Rudasill 《图书馆管理杂志》2015,55(2):153-164
Strategic planning requires us to stop and take a closer look at our organizations and consider the impact that changes in the profession are causing, influenced by the society around us. These considerations lead us past our library walls, past our institutional walls and into a more speculative world of changes in the technological society. Scholars and pundits have provided us with many scenarios for the future, including a world of solely electronic resources and hyper-connected users. But how closely does this match reality and what are the trends in our larger society that will affect how we work in the future. This article provides an overview of several reports on the students and technologies that we work with and closely explores the IFLA Trend Report. The report was developed after discussions with individuals representing many non-academic, non-library organizations and provides us with a view of the larger trends forecast for the information society. The report is envisioned as a living document that invites further comment and wider distribution to the library world and beyond. 相似文献
953.
Based on a socio-cultural perspective on learning, the aim of this article is to examine how aims and learning goals are communicated in physical education (PE) practice. A special focus is on scrutinising how teaching practices are framed in terms of whether and how the aims and learning goals are made explicit or not to students. The aim is also to relate these kinds of communications to different movement cultures. The result shows that many of the students taking part in the study do not understand what they are supposed to learn in PE. However, if the goals are well articulated by teachers, the students are more likely to both understand and be aware of the learning outcomes and what to learn in PE. The opposite is also true. If the goals and objectives are not clarified, students find it difficult to state the learning objectives and know what they are supposed to learn. 相似文献
954.
Mary Briggs Suzanne Carrington Chris Coates Mary Doveston Anthony Feiler Cath Gristy Elaine Hall Jenny Hankey Jane Holford Marie Howley Mary Kellett Jackie Lown Elspeth McCartney Diane Montgomery Melanie Nind Sue Pearson Richard Rose Geoff Tennant Kate Wall Philip Garner 《Support for Learning》2009,24(1):3-4
955.
Biochemical markers of inflammation are emerging as new predictors of risk of cardiovascular disease (CVD) and may alter acutely with exercise. Few studies have been conducted on the effects of walking on these markers or whether different walking intensities elicit varied effects. As there is growing interest in modifiable lifestyle factors such as walking to reduce CVD risk, these inflammatory responses warrant investigation. The aim of this study was to compare the effects of walking at 50% versus 70% of predicted maximal heart rate on C-reactive protein (CRP), plasma fibrinogen, and triglycerides in sedentary post-menopausal women. Twelve post-menopausal women (mean age 58 years, s +/-6; stature 1.62 m, s+/-0.06; body mass 66.8 kg, s +/-6.2) completed two 30-min treadmill walks in a randomized cross-over design. Fasted blood samples were taken (for the determination of plasma fibrinogen, CRP, and lipids) before, immediately after, and 1 and 24 h after exercise. Triglyceride concentrations decreased from pre-exercise to 24 h post exercise at both walking intensities (time x group interaction, P < 0.05). No significant effects were observed for plasma fibrinogen, CRP, total cholesterol, low-density or high-density lipoprotein cholesterol (time x group interaction, P > 0.05). The results of this study suggest that fasting plasma triglycerides are decreased on the morning after 30 min of brisk walking at either 50% or 70% of maximal heart rate (moderate and vigorous intensity). 相似文献
956.
A comparison was made of bilingual Puerto Rican students' scores on the WISC-R and the Escala de Inteligencia Wechsler Para Ninos to see whether there were any differences in scores based on the language in which they were tested. These children were determined to be equally proficient in English and Spanish, based on scores from the Dailey Language Facility Test. There were no significant differences between the Full Scale and the Verbal Scale scores on both tests, but significant differences were found between the Verbal and Performance Scale scores on both tests. Caution in testing bilingual children before determination of bilinguality, as well as further research into development of intelligence tests for individual culture groups, is recommended. 相似文献
957.
958.
Joy Patricia Burke Geraldine Cain Ellison Jeanne P. Hunt 《Psychology in the schools》1985,22(3):260-264
While numerous studies attest to a relationship between academic self-concept and achievement, a variety of measures of self-concept have been used, and the equivalence of these instruments has received limited attention. In this investigation, the Self-Concept of Ability Scale (SCAS) and the newer and less examined Self-Perception of Attainment Scale (SPAS) were compared for their ability to predict achievement in reading as measured by the California Achievement Test (CAT). We predicted that: (a) both scales would be significant predictors of reading achievement, (b) when used as single predictors, the SCAS would have significantly greater weight than the SPAS, and (c) a linear combination of these scales would have greater weight than either scale alone. Using 187 eighth-grade students, we confirmed that both scales were significant predictors of achievement in reading and that a linear combination of the two accounted for more variance than either scale alone. We did not find, however, that the SCAS was a significantly better predictor than the SPAS. 相似文献
959.
Librarians are succumbing to the influence of the easy-to-adopt, prefab, impersonal, ugly, and often impenetrable jargon borrowed from business and computer technology. Thus, they are in danger of beginning to think of libraries as businesses that provide primarily electronic information and facts rather than materials to support humanistic knowledge and insight. 相似文献
960.
This paper presents an alumni researchstudy as a model for assessing how well highereducation prepares graduates for changing professionaland labour market realities. Results revealed that,while alumni valued the innovative curriculum, theyrecommended increased focus on functional skills; morebalance between team work and individual work; andexpansion of the programme's area of specialisation. Policy recommendations advocated strengthening theemphasis on functional skills; intensifying the rigourof technical and financial coursessemi; linking thefaculty as mentors to students for career developmentsemi;and expanding the school's reputation for excellencein finance as well as in entrepreneurship. 相似文献