全文获取类型
收费全文 | 43723篇 |
免费 | 764篇 |
国内免费 | 47篇 |
专业分类
教育 | 31377篇 |
科学研究 | 3813篇 |
各国文化 | 474篇 |
体育 | 3416篇 |
综合类 | 46篇 |
文化理论 | 372篇 |
信息传播 | 5036篇 |
出版年
2022年 | 282篇 |
2021年 | 467篇 |
2020年 | 732篇 |
2019年 | 1103篇 |
2018年 | 1477篇 |
2017年 | 1549篇 |
2016年 | 1402篇 |
2015年 | 829篇 |
2014年 | 1204篇 |
2013年 | 8591篇 |
2012年 | 1134篇 |
2011年 | 1223篇 |
2010年 | 916篇 |
2009年 | 916篇 |
2008年 | 1043篇 |
2007年 | 938篇 |
2006年 | 841篇 |
2005年 | 780篇 |
2004年 | 720篇 |
2003年 | 665篇 |
2002年 | 719篇 |
2001年 | 835篇 |
2000年 | 763篇 |
1999年 | 725篇 |
1998年 | 406篇 |
1997年 | 430篇 |
1996年 | 484篇 |
1995年 | 439篇 |
1994年 | 387篇 |
1993年 | 398篇 |
1992年 | 607篇 |
1991年 | 574篇 |
1990年 | 591篇 |
1989年 | 569篇 |
1988年 | 515篇 |
1987年 | 517篇 |
1986年 | 481篇 |
1985年 | 592篇 |
1984年 | 472篇 |
1983年 | 444篇 |
1982年 | 387篇 |
1981年 | 377篇 |
1980年 | 323篇 |
1979年 | 472篇 |
1978年 | 386篇 |
1977年 | 348篇 |
1976年 | 295篇 |
1975年 | 242篇 |
1974年 | 237篇 |
1973年 | 229篇 |
排序方式: 共有10000条查询结果,搜索用时 812 毫秒
41.
42.
Clifford A. Lynch 《Archives and Museum Informatics》1997,11(1):5-13
Digital documents in the networked information environment fundamentally change the ways that visual materials can be used in education and scholarly discourse. These new uses raise questions about research library strategies with regard to digitized visual materials as a part of their collections, challenge assumptions underlying intellectual property rights for images and their scope, and offer ways in which visual literacy can become a more integral part of the common educational experience. 相似文献
43.
L A Colaianni 《Bulletin of the Medical Library Association》1992,80(1):1-8
The 1991 Janet Doe lecturer describes the vision held by the founders of the Medical Library Association of medical information being readily accessible to health professionals no matter how far they were located from major medical centers, and traces the pursuit of this vision to current outreach activities. 相似文献
44.
Wendy M. Yen 《Educational Measurement》1997,16(3):5-15
How accurate is the reported percent of students’reaching standards at the school level? How are standard errors for these statistics computed? How do estimates vary with choice of generalizability model? 相似文献
45.
46.
47.
John M. Budd 《Publishing Research Quarterly》1991,7(2):27-37
In recent years university presses have undergone some significant changes, such as expansion of their scope to include materials
that may have appeal beyond the scholarly market. This article investigates, through the use of a survey of university libraries,
the acquisition of university press products by libraries. In general, recent years have been changes in the relationship
between university presses and libraries that have resulted in fewer items being purchased by the libraries. 相似文献
48.
Donald D. Deshler Jean B. Schumaker B. Keith Lenz Janis A. Bulgren Michael F. Hock Jim Knight Barbara J. Ehren 《Learning disabilities research & practice》2001,16(2):96-108
Three factors tied with secondary student success in content‐area reading are demonstrated: (a) validated teacher‐focused and student‐focused interventions, (b) integrated and comprehensive service delivery systems, and (c) well‐designed, data‐based professional developmental programs. Difficult challenges face secondary students with LD and their teachers with regard to these students’ participation and success in required general education classes. Recently, instructional methods and materials have been developed and validated for promoting these students’ success. Some of them focus on how general education teachers plan and teach their content‐area courses; others focus on giving students the strategies they need to respond independently to the demands of their courses. This article describes these instructional methods, a service‐delivery model for implementing these interventions in secondary schools, and professional‐development mechanisms and administrative support that must be in place for the model to be maintained effectively. 相似文献
49.
David Smith 《Higher Education Quarterly》2001,55(2):131-157
Collaboration in research activity is now the rule not the exception. It is encouraged by government, funding bodies and research councils. However, the concept of collaboration is difficult to define. It occurs at many different levels, driven by a complex research system-policy dynamic. Three different models of collaboration – inter-personal, team and corporate – are identified, each with their own rationale, structure, benefits and costs. The paper examines the institutional implications of these models. It argues that institutions and individual researchers conceptualise and operationalise research collaboration in different ways. Although vital to institutional mission, collaborative research is rarely mapped by senior managers with any precision. In general, institutional approaches to the management of collaborative research lag behind the policy rhetoric. The paper concludes with an overview of the key dilemmas for institutional strategists and policy makers posed by the shift towards more collaborative approaches to research. 相似文献
50.
Julie A. Washington 《Learning disabilities research & practice》2001,16(4):213-221
The poor reading achievement of African-American children in urban schools is well established. African-American children from low-income homes may be at particular risk for reading difficulties, although middle-income children often fare poorly as well. Intervention efforts have focused on children in kindergarten through fifth grade. This article suggests that prevention efforts must begin prior to kindergarten entry. Several key variables that may influence young children's performance, including poverty, general oral language skills, dialectal variations, home literacy practices, standardized testing bias, and teacher expectations, are explored. Future directions for research addressing emergent literacy in African-American children are discussed throughout. 相似文献