全文获取类型
收费全文 | 8996篇 |
免费 | 73篇 |
国内免费 | 8篇 |
专业分类
教育 | 6623篇 |
科学研究 | 740篇 |
各国文化 | 150篇 |
体育 | 569篇 |
综合类 | 5篇 |
文化理论 | 109篇 |
信息传播 | 881篇 |
出版年
2021年 | 64篇 |
2020年 | 89篇 |
2019年 | 169篇 |
2018年 | 219篇 |
2017年 | 252篇 |
2016年 | 233篇 |
2015年 | 180篇 |
2014年 | 225篇 |
2013年 | 2096篇 |
2012年 | 177篇 |
2011年 | 199篇 |
2010年 | 190篇 |
2009年 | 163篇 |
2008年 | 205篇 |
2007年 | 212篇 |
2006年 | 191篇 |
2005年 | 197篇 |
2004年 | 180篇 |
2003年 | 160篇 |
2002年 | 150篇 |
2001年 | 129篇 |
2000年 | 128篇 |
1999年 | 137篇 |
1998年 | 114篇 |
1997年 | 117篇 |
1996年 | 119篇 |
1995年 | 147篇 |
1994年 | 123篇 |
1993年 | 107篇 |
1992年 | 114篇 |
1991年 | 106篇 |
1990年 | 103篇 |
1989年 | 107篇 |
1988年 | 98篇 |
1987年 | 97篇 |
1986年 | 88篇 |
1985年 | 99篇 |
1984年 | 106篇 |
1983年 | 99篇 |
1982年 | 111篇 |
1981年 | 82篇 |
1980年 | 63篇 |
1979年 | 75篇 |
1978年 | 79篇 |
1977年 | 85篇 |
1976年 | 67篇 |
1975年 | 56篇 |
1974年 | 59篇 |
1973年 | 60篇 |
1971年 | 44篇 |
排序方式: 共有9077条查询结果,搜索用时 15 毫秒
991.
John J. B. Ayres Howard Axelrod Elizabeth Mercker Fran Muchnik Michael Vigorito 《Learning & behavior》1985,13(1):44-50
In a conditioned suppression study with rats, CS modality (light vs. noise) and type of conditioning (on-line vs. off-line training) were manipulated. All rats were then tested on-line with only half the test trials reinforced. Some results and conclusions were as follows: (1) During initial training, suppression following reinforced noise trials was moderately strong at first but weakened over days; for the light, it was weak from the start. It was suggested that this strong influence of CS modality might complicate interpretations of posttrial suppression as a measure of US effectiveness. (2) During testing, posttrial suppression and freezing were greater following non-reinforced trials than following reinforced trials (US-omission effect), and this effect was stronger for noise than for light. Since noise also produced more freezing than light, this result favors the hypothesis that the US-omission effect is due to persistent CS-elicited freezing that is un-disrupted by a shock US. (3) Although noise produced more freezing, both noise and light produced similar barpress suppression. This result is consistent with the suggestion that noise and light acquire equal associative strength but elicit different defensive behaviors. 相似文献
992.
Lewis O Sargent J Chaffin M Friedrich WN Cunningham N Cantor P Sumner Coffey P Villani S Beard PR Clifft MA Greenspun D;Network Child Abuse Prevention Treatment Program Open Society Institute Soros Foundations Network Children's Mental Health Alliance 《Child abuse & neglect》2004,28(1):93-111
PROBLEM: After the Soviet Union dissolved in 1989, it became apparent that there was little recognition of the problems of child abuse and neglect, professionally, legally, or societally. There were no effective systems or laws in place to deal with these problems. METHOD: Beginning in 1995 the Children's Mental Health Alliance, in conjunction with the Open Society Institute began conducting trainings in Eastern Europe [Journal of the American Academy of Child Adolescent Psychiatry 39 (2000) 660]. Originally 18 countries from the Baltics to the Balkans participated. A program was elaborated which would proceed in several stages: (1) training mental health professionals to deal with child abuse and neglect (CAN); (2) teaching multidisciplinary team work and fostering the development of multidisciplinary NGOs focused on CAN; (3) promoting the self-sufficiency of these NGO's which would then facilitate social and legal reform and increase public awareness of the problem. Specific methods included multi-national trainings, assignment of mentors to the developing teams who maintained weekly contact with the teams and made yearly site visits to their countries, and overseeing project grants from OSI. RESULTS: NGO's had been established and registered in 11 countries, many establishing a network of programs within their countries. By 2000, over 3800 mental health professional had been trained, either directly by the program or by the trainees of the program. By the end of 2000, over 17,000 other professionals (lawyers, police, judges, educators, other physicians, etc.) had been trained by the network. CONCLUSION: While more work needs to be in this region, the teams in 11 countries have made solid starts. 相似文献
993.
994.
OBJECTIVES: This study had two primary objectives: First, to examine the nature and co-occurrence of various forms of child maltreatment (sexual, physical, emotional, and witnessing violence) reported by Latina college students, and second, to explore coexisting maltreatment types and acculturation status as possible contributors to long-term adjustment difficulties. METHOD: Participants were 112 Latina undergraduate students categorized by the number of childhood maltreatment types experienced (0, 1, or 2 or more) and acculturation level (1 to 5). The possible effects of co-occurring forms of maltreatment, in conjunction with acculturation status, were investigated with respect to participants' reported trauma symptomatology. Data were collected using self-report measures. RESULTS: Nearly three out of 10 participants (29%) experienced more than one type of child maltreatment and, as expected, these individuals reported greater trauma symptomatology than those reporting either a single type of maltreatment or no maltreatment at all. Those who reported multiple types also endured more severe maltreatment than did respondents who experienced a single type. Acculturation level was neither directly related to trauma symptoms nor did it moderate the lasting correlates of maltreatment among victims. Interestingly, those who experienced a single form of maltreatment reported no more trauma symptoms than did participants who reported no maltreatment history at all. CONCLUSION: This investigation documents a large degree of overlap among various forms of self-reported childhood maltreatment within a Latina college population. The results underscore the need to consider multiple forms of maltreatment, as well as severity, when making inferences regarding potential effects on later functioning. 相似文献
995.
Tomáš Sýkora Tereza Stárková Cyril Brom 《British journal of educational technology : journal of the Council for Educational Technology》2021,52(1):42-56
Little is known about the instructional effects of narrative framing elements in child learning games. In this study, second and third graders (Mage = 8.24) played one of two versions of a successful, commercial mathematical learning game at home for 2 weeks (N = 95; between-subject design). The versions differed in the presence/absence of a background story conveyed through comic cutscenes at the beginning and the end of the game. Results showed that children played the game intensively in both conditions: despite not being forced to do so. Plus, they also learned from the game. As expected, children assigned to the cutscenes condition interfaced with the cutscenes. However, no between-group difference was detected in pre-post learning gains, parent-reported engagement, self-reported enjoyment, time spent with the game and the number of solved in-game tasks (all |ds| < 0.29). Altogether, no advantage or disadvantage from the narrative comic cutscenes was revealed. 相似文献
996.
The close link between environmental education and development education advocated by major international reports of the last decade is operant in the UNESCO Asia‐Pacific region. A regional collaborative effort sponsored by the Asia‐Pacific Centre of Educational Innovation for Development (ACEID), UNESCO and Griffith University is creating an action research network to support teacher education in environmental education. The process is informed by Paul Hart's and Ian Robottom's argument that constructivist epistemology is consistent with an ecological world view and, therefore, provides an appropriate grounding for professional development in environmental education. Teacher educators from some 20 countries in the region are sharing in the writing of workshop modules for pre‐ and in‐service teachers; these are then critiqued and adapted in accordance with the needs of other countries. A culture of action research is being created by encouraging those involved to write case studies of their design, critique, adaptation and use of the materials as part of their professional development 相似文献
997.
John W. Adams 《Journal of Research in Special Educational Needs》2007,7(2):97-103
Identifying individuals with mathematical difficulties (MD) is becoming increasingly important in our education system. However, recognising MD is only the first stage in the provision of special educational needs (SEN). Although planning the effective remedial support is vital, there is little consensus on the interventions that are appropriate. There are two main reasons for this: first, MD has a variety of manifestations which appear to change with age; and second, there are many potential causes for the difficulties individuals experience. This paper addresses these issues by reviewing research evidence from three 'domains' of psychological research (genetic, cognitive, behavioural), all of which appear to offer insights into potential influences on mathematical ability. 相似文献
998.
Keith W. Dickinson Anne Pollock John Troy 《Assessment & Evaluation in Higher Education》1995,20(1):59-66
The 1992–93 session in Scottish universities saw the introduction of the Scottish Higher Education Funding Council's (SHEFC) statutory requirement to introduce quality assessments of teaching and learning. This paper looks at some of the issues that have arisen from the experience of staff at Napier University in terms of being assessed. It focuses on the issues that have arisen from the first and second round of visits to institutions. The key questions and problems associated with the process are considered in the context of the following headings: (1) defining quality; (2) the role of the lead assessor; (3) the framework for the visit; (4) the role of the student; (5) the quality of the reports; (6) the cost benefit analysis. SHEFC's stated aims for assessment are evaluated in the light of the above. 相似文献
999.
Antireflection is an essential requirement for certain optoelectronic devices. Antireflective surfaces can be generated by different methods. One method mimics the nanofeatures on the moth eye surface. This can be done by ‘soft lithography’ (SL), where nanofeatures are created on an elastomeric stamp. This stamp is then used for imprinting the pattern on other surfaces. 相似文献
1000.