全文获取类型
| 收费全文 | 126760篇 |
| 免费 | 1900篇 |
| 国内免费 | 238篇 |
专业分类
| 教育 | 88412篇 |
| 科学研究 | 13835篇 |
| 各国文化 | 2069篇 |
| 体育 | 9724篇 |
| 综合类 | 174篇 |
| 文化理论 | 1120篇 |
| 信息传播 | 13564篇 |
出版年
| 2021年 | 956篇 |
| 2020年 | 1689篇 |
| 2019年 | 2629篇 |
| 2018年 | 3194篇 |
| 2017年 | 3469篇 |
| 2016年 | 3503篇 |
| 2015年 | 2412篇 |
| 2014年 | 3296篇 |
| 2013年 | 28093篇 |
| 2012年 | 2454篇 |
| 2011年 | 2829篇 |
| 2010年 | 2424篇 |
| 2009年 | 2697篇 |
| 2008年 | 2481篇 |
| 2007年 | 2244篇 |
| 2006年 | 2466篇 |
| 2005年 | 2459篇 |
| 2004年 | 3128篇 |
| 2003年 | 2439篇 |
| 2002年 | 2233篇 |
| 2001年 | 2071篇 |
| 2000年 | 1770篇 |
| 1999年 | 1643篇 |
| 1998年 | 1519篇 |
| 1997年 | 1591篇 |
| 1996年 | 1766篇 |
| 1995年 | 1557篇 |
| 1994年 | 1541篇 |
| 1993年 | 1523篇 |
| 1992年 | 1565篇 |
| 1991年 | 1466篇 |
| 1990年 | 1462篇 |
| 1989年 | 1392篇 |
| 1988年 | 1239篇 |
| 1987年 | 1189篇 |
| 1986年 | 1211篇 |
| 1985年 | 1466篇 |
| 1984年 | 1330篇 |
| 1983年 | 1329篇 |
| 1982年 | 1310篇 |
| 1981年 | 1214篇 |
| 1980年 | 1182篇 |
| 1979年 | 1319篇 |
| 1978年 | 1235篇 |
| 1977年 | 1147篇 |
| 1976年 | 1026篇 |
| 1975年 | 841篇 |
| 1974年 | 836篇 |
| 1973年 | 810篇 |
| 1971年 | 666篇 |
排序方式： 共有10000条查询结果，搜索用时 15 毫秒
921.
922.
923.
924.
925.
926.
Michelle M. Wu 《Legal Reference Services Quarterly》2017,36(2):51-73
Digitize-and-lend library projects can benefit societies in multiple ways, from providing information to people in remote areas or with physical disabilities to facilitating the sharing of library resources with information-poor communities. This article explores the potential of digitize and lend as well as outlines how projects can be undertaken in a manner respectful of the balance of copyright. 相似文献
927.
928.
929.
Karla K. McGregor Natalie Langenfeld Sam Van Horne Jacob Oleson Matthew Anson Wayne Jacobson 《Learning disabilities research & practice》2016,31(2):90-102
To explore the university experiences of students with learning disabilities (LD), 63,802 responses to the 2014 Student Experience in the Research University Survey were analyzed. Compared to other students, those with self‐reported LD (5.96 percent) had difficulty with assignments and had more obstacles caused by nonacademic responsibilities and imposed by their skill levels. Students with self‐reported LD sensed more bias toward people with disabilities on campus, and they were less satisfied with their overall experience. Interactions between disability status and age suggested even more challenges for older students who self‐reported LD. Approximately one‐third of students who self‐reported LD received accommodations. The rate of accommodations was higher among individuals who were wealthy, who lived alone, and who were out‐of‐state students. Compared to students who self‐reported LD but reported no accommodations, those with accommodations had more contact with faculty and less difficulty with assignments. 相似文献
930.
Sylke V. Schnepf 《Higher Education Quarterly》2017,71(1):75-96
Dropping out of university is regularly discussed as a negative indicator. However, research on actual career trajectories of dropouts is virtually non‐existent. This study estimates the association between tertiary dropouts and career chances in 15 European countries. Using data from the 2011 Programme for the International Assessment of Adult Competencies (PIAAC), estimates are derived from the application of propensity score matching taking a variety of individual background characteristics including cognitive skills into account. Results indicate that individuals are likely to fare better in the labour market if they enrol in university and drop out than if they do not enrol at all. Policy makers need to revise the notion that dropping out is purely negative. 相似文献