全文获取类型
收费全文 | 4490篇 |
免费 | 50篇 |
专业分类
教育 | 3167篇 |
科学研究 | 435篇 |
各国文化 | 69篇 |
体育 | 358篇 |
综合类 | 2篇 |
文化理论 | 61篇 |
信息传播 | 448篇 |
出版年
2021年 | 40篇 |
2020年 | 76篇 |
2019年 | 121篇 |
2018年 | 133篇 |
2017年 | 138篇 |
2016年 | 113篇 |
2015年 | 79篇 |
2014年 | 123篇 |
2013年 | 988篇 |
2012年 | 103篇 |
2011年 | 101篇 |
2010年 | 84篇 |
2009年 | 94篇 |
2008年 | 94篇 |
2007年 | 84篇 |
2006年 | 102篇 |
2005年 | 97篇 |
2004年 | 81篇 |
2003年 | 76篇 |
2002年 | 70篇 |
2001年 | 59篇 |
2000年 | 69篇 |
1999年 | 61篇 |
1998年 | 62篇 |
1997年 | 57篇 |
1996年 | 49篇 |
1995年 | 44篇 |
1994年 | 43篇 |
1993年 | 46篇 |
1992年 | 43篇 |
1991年 | 54篇 |
1990年 | 56篇 |
1989年 | 53篇 |
1988年 | 48篇 |
1987年 | 52篇 |
1986年 | 43篇 |
1985年 | 53篇 |
1984年 | 43篇 |
1983年 | 45篇 |
1982年 | 38篇 |
1981年 | 31篇 |
1980年 | 39篇 |
1979年 | 52篇 |
1978年 | 48篇 |
1977年 | 37篇 |
1976年 | 40篇 |
1975年 | 24篇 |
1974年 | 32篇 |
1973年 | 30篇 |
1971年 | 23篇 |
排序方式: 共有4540条查询结果,搜索用时 31 毫秒
71.
Howard Woodhouse 《Interchange》2005,36(1-2):121-138
On the basis of insights provided by Whitehead and John Cobb, I show how the People’s Free University of Saskatchewan (PFU) is a working model of free, open, community-based education that embodies several characteristics of Whitehead’s philosophy of education. Formed in opposition to the growing commercialization at the original “people’s university,” (the University of Saskatchewan) the PFU has spawned distinctive ideals of its own. The PFU reflects Whitehead’s belief in the importance of shared knowledge fostered by community-based education, the value of abstract and practical knowledge, and the power of the imagination to establish a community of learners capable of acting freely together. 相似文献
72.
73.
Pigeons were trained on two independent tasks. One involved red and yellow hues, the other involved blue and green hues. For half of the birds, the two tasks were the same (i.e., both tasks were either matching-to-sample, or oddity-from-sample). For the remaining birds, the two tasks were different (i.e., one task was matching-to-sample; the other task was oddity-from-sample). Following acquisition, the pigeons were exposed to test trials on which either the correct or the incorrect comparison hue was replaced with one of the hues from the other task. On yellow-sample trials and on green-sample trials, the pigeons performed as if they had a common code for yellow and green. When there was one comparison available that was appropriate to the “yellow/green” code, performance remained high; but when either both comparisons or neither comparison was appropriate to the “yellow/green” code, performance dropped. The pigeons also tended to code red samples as green and to code blue samples as yellow. The results indicate that pigeons can categorically code colors under conditions that rule out a failure to discriminate among the colors. 相似文献
74.
Joy Howard 《The Urban Review》2018,50(4):693-712
The author asserts that the field of teacher education must begin a critical conversation to better prepare and support teachers in attending to the complexities of racialized identities, experiences, and perspectives of multiracial students in K12 schools. The author offers a review of literature relevant to multiracial students, and draws from the emerging theoretical framework of Multicrit (Harris in Int J Qual Stud Educ 29(6):795–813, 2016) to present monoracism, ahistoricism, colorism and intersectionality to analyze excerpts from three respective research studies. Each excerpt demonstrates an imperative to build a critical understanding of multiracial students within teacher work. The author concludes with implications for future research and practice. 相似文献
75.
The purpose of this study was to examine undergraduate and graduate student enrollments, course delivery modes, and curricular trends and issues of CTE programs. Based on findings from 139 program/department coordinators, results emphasized that although CTE programs within institutions of higher education have declined in number (Fletcher, Gordon, Asunda, &; Zirkle, 2015), student enrollments within those programs have remained steady compared to prior studies (Bruening et al., 2001; Lynch, 1990). Even so, CTE program/department administrators have articulated that declining student enrollment is a major challenge within their programs. Additionally, the development of online courses and the impact of state/national educational reform initiatives were identified as major curricular trends for CTE programs. Recommendations include the need for CTE faculty to embrace online instruction, and for programs to use broader nomenclature of CTE/Workforce Education, instead of names of more traditional subdisciplines within the field to remain more accessible and sustainable in the future. The condition of undergraduate and graduate CTE programs will likely impact the viability and sustainability of CTE teacher preparation programs, recruitment of a talented and diverse CTE teaching force, continuity of the U.S. teaching workforce, and ability of K–12 teachers to maintain high-quality CTE programs. 相似文献
76.
Howard Y. McClusky 《Innovative Higher Education》1980,5(1):18-29
Both cross sectional and longitudinal studies of change with age in mental ability and cross sectional studies of change with age in cognitive performance indicate that the ability to learn generally does not decline in adulthood but continues at a stable and responsive level well into the later years. This conclusion is not only supported by psychological research but also confirmed by the rapidly growing numbers of older persons who are returning to and succeeding in the pursuit of educational activities. If and when decline does occur, it is usually modest, often reversible, rarely extreme, and rarely if ever great enough to preclude the possibility of learning that may be highly meaningful to the older learner.Howard Y. McClusky is the charter President of the Adult Education Association of the U.S.A. and a Fellow of the American Psychological Association. He is currently active as an Adjunct Professor in the Department of Adult and Continuing Education and Faculty Associate in the Institute of Gerontology at the University of Michigan, Ann Arbor, Michigan 48109. 相似文献
77.
There still appears to be a gap between what online learning promises and what it can deliver in terms of student learning. Developments in online pedagogies and professional learning appear to lag behind the developments in technology and the promised benefits of technological transformation may not be realised. In this paper, we bring together perspectives that highlight vital aspects of online group-learning by reviewing the group-facilitation literature and the latest online learning literature to interrogate the pedagogical theories and practices currently used in online group-learning in higher education. We specifically focus on the interpersonal interactions between teachers and students, which are described in the online learning literature using the terms instructor immediacy, teaching presence, and social presence. We note differences in the literature regarding how teacher presence is interpreted and enacted and we expound the importance of the personal characteristics of the online teacher. Finally, we provide some signposts that might help course designers and teachers to improve online group learning: the intentional use of effective online learning pedagogies; a deeper understanding of what constitutes teacher presence; and strategies to enact that teacher presence with online groups. Recommendations for further research in online group facilitation are provided. 相似文献
78.
Video-assisted thoracoscopic surgery (VATS) for bilateral primary spontaneous pneumothorax 总被引:3,自引:0,他引:3
Chen YJ Luh SP Hsu KY Chen CR Tsao TC Chen JY 《Journal of Zhejiang University. Science. B》2008,9(4):335-340
Objective:To review our experience of the treatment of bilateral primary spontaneous pneumothorax (PSP) by video-assisted thoracoscopic surgery (VATS). Materials and methods: Retrospective chart review was followed by an on-clinic or telephone interview. Patients were cared for by one thoracic surgeon in four medical centers or community hospitals in Northern and Central Taiwan. Thirteen patients with bilateral PSP underwent bilateral VATS simultaneously or sequentially from July 1994 to December 2005. Results: Twelve males and one female, with age ranging from 15 to 36 years (mean 23.1 years), were treated with VATS for bilateral PSP, under the indications of bilateral pneumothoracis simultaneously (n=4) or sequentially (n=9). The interval between the first and second contra-lateral VATS procedure for non-simultaneous PSP patients ranged from 7 d to 6 years. Eleven of 13 patients (84.6%) had prominent pulmonary bullae/blebs, and underwent bullae resection with mechanical or chemical pleurodesis. The mean operative time was (45.6±18.3) min (range 25-96 min) and (120.6±28.7) min (range 84-166 min) respectively for the non-simultaneous (second VATS for the recurrence of contralateral side after first VATS) and simultaneous (bilateral VATS in one operation) procedures. There was no postoperative mortality. However, prolonged air leakage (>7 d) occurred in one patient (7.7%) who recovered after conservative treatment. The mean duration of chest tube drainage was 3.1 d and the median follow up period was 3.4 years. Conclusions: VATS is a safe and effective procedure in the treatment of bilateral PSP. Bilateral VATS is only recommended for patients with simultaneously bilateral PSP, because the incidence of recurrence, even with visible bullae, was not so high in my group and in some previous literature. Bilateral VATS in a supine position should only be used in selective cases, because of possible pleural adhesion or hidden bullae on the posterior side. 相似文献
79.
Audiogenic seizures in mice: Asymmetries of the preconvulsive running pattern and subsequent seizure
Asymmetries in the progression of unilaterally and bilaterally induced audiogenic seizures were examined in DBA/2J and SJL/J mice. Both strains were found to exhibit consistent asymmetries in direction(s) of running as well as in the side of fall during a convulsion. This correspondence suggests that the bursts of running are an integral part of an audiogenic seizure. The incorporation of information on asymmetries of the locomotor prelude in future studies should prove valuable for understanding the physiological mechanisms of audiogenic seizure. 相似文献
80.
Thomas H. Turney 《Learning & behavior》1976,4(4):363-366
Long-Evans rats were trained on an easy simultaneous discrimination problem and then transferred to a hard discrimination problem. The discriminanda were different orientations of stripes. In Experiment I, transfer was intradimensional with stimulus generalization controlled. The easy-to-hard effect was not found. In Experiment II transfer was intradimensional and either compatible (nonreversal) or incompatible (reversal). With compatible transfer, rats trained on a prior easy problem learned the hard problem faster than rats trained only on the hard problem. Persistent negative transfer was found with incompatible transfer. Attention was not supported as underlying the easy-to-hard effect. Explanations based on specific sources of intradimensional transfer, such as stimulus generalization or adaptation level, are suggested. 相似文献