全文获取类型
收费全文 | 2680篇 |
免费 | 50篇 |
国内免费 | 2篇 |
专业分类
教育 | 2175篇 |
科学研究 | 72篇 |
各国文化 | 36篇 |
体育 | 101篇 |
文化理论 | 13篇 |
信息传播 | 335篇 |
出版年
2022年 | 9篇 |
2021年 | 19篇 |
2020年 | 38篇 |
2019年 | 60篇 |
2018年 | 77篇 |
2017年 | 94篇 |
2016年 | 73篇 |
2015年 | 63篇 |
2014年 | 62篇 |
2013年 | 694篇 |
2012年 | 64篇 |
2011年 | 86篇 |
2010年 | 68篇 |
2009年 | 71篇 |
2008年 | 77篇 |
2007年 | 77篇 |
2006年 | 68篇 |
2005年 | 63篇 |
2004年 | 63篇 |
2003年 | 54篇 |
2002年 | 60篇 |
2001年 | 45篇 |
2000年 | 46篇 |
1999年 | 34篇 |
1998年 | 33篇 |
1997年 | 50篇 |
1996年 | 31篇 |
1995年 | 35篇 |
1994年 | 35篇 |
1993年 | 31篇 |
1992年 | 31篇 |
1991年 | 27篇 |
1990年 | 22篇 |
1989年 | 23篇 |
1988年 | 21篇 |
1987年 | 12篇 |
1986年 | 25篇 |
1985年 | 25篇 |
1984年 | 21篇 |
1983年 | 23篇 |
1982年 | 19篇 |
1981年 | 14篇 |
1980年 | 23篇 |
1979年 | 18篇 |
1978年 | 22篇 |
1977年 | 19篇 |
1976年 | 16篇 |
1973年 | 9篇 |
1970年 | 8篇 |
1969年 | 9篇 |
排序方式: 共有2732条查询结果,搜索用时 0 毫秒
1.
2.
3.
Direct and indirect measures were used to compare the written language abilities of three groups of college students: two with learning disabilities and one without learning disabilities. Main effects were found for group, but not gender. Differences between nonlearning disabled students (NLD) and those with learning disabilities (LD) in writing were evident on both types of measures. Performance by LD students with disabilities in an area other than writing differed depending on the type of measure and often was no different from either of the other two groups. The combined use of direct and indirect measures appeared most effective for examining the complexities of writing produced by all groups. 相似文献
4.
5.
Sandra L De Groote Mary Shultz Marceline Doranski 《Journal of the Medical Library Association》2005,93(2):223-228
PURPOSE: The purpose was to determine the impact of online journals on the citation patterns of medical faculty. This study looked at whether researchers were more likely to limit the resources they consulted and cited to those journals available online rather than those only in print. SETTING: Faculty publications from the college of medicine at a large urban university were examined for this study. The faculty publications from a regional medical college of the same university were also examined in the study. The number of online journals available for faculty, staff, and students at this institution has increased from an initial core of 15 online journals in 1998 to over 11,000 online journals in 2004. METHODOLOGY: Searches by author affiliation were performed in the Web of Science to find all articles written by faculty members in the college of medicine at the selected institution. Searches were conducted for the following years: 1993, 1996, 1999, and 2002. Cited references from each faculty-authored article were recorded, and the corresponding cited journals were coded into four categories based on their availability at the institution in this study: print only, print and online, online only, and not owned. Results were analyzed using SPSS. RESULTS: The number of journals cited per year continued to increase from 1993 to 2002. The results did not indicate that researchers were more likely to cite online journals or were less likely to cite journals only in print. At the regional location where the number of print-only journals was minimal, use of the print-only journals did decrease in 2002, although not significantly. CONCLUSION/DISCUSSION: It is possible that electronic access to information (i.e., online databases) has had a positive impact on the number of articles faculty will cite. Results of this study suggest, at this point, that faculty are still accessing the print-only collection, at least for research purposes, and are therefore not sacrificing quality for convenience. 相似文献
6.
Juliette Langlois Guylaine Mary Hélène Bluzat Agnès Cascio Nathalie Balcar Yannick Vandenberghe 《文物保护研究》2017,62(5):247-265
Prior to the exhibition Portrait-making, Rodin and his models (2009), the Rodin museum wanted to restore two busts of Hanako and Clemenceau. Interestingly, these two sculptures contain pieces of modern modeling materials (MMMs) invented at the end of the nineteenth century as an alternative to clay or waxes. The poor state of conservation of the two portraits made any handling and exhibition impossible. Accordingly, the purpose of this article is twofold: to contribute to technical art history and conservation. Elemental and chemical analyses were done on samples from 12 sculptures (SEM–EDX, FTIR, GC–MS, GC–FID, XRD, synchrotron-based µXRF, µXANES, and µFTIR) aimed at identifying the composition of MMMs used by Rodin on plaster sculptures and establishing hypotheses about the origins of their degradation. This thorough study of their composition and degradation was necessary to implement an appropriate restoration plan. The development of conservation protocols adapted to such materials is rarely documented. Different tests were performed on mock-ups (pH, solubility, adhesion, consolidation, and cleaning). In particular, a protocol based on laser cleaning was developed and successfully applied to remove superficial dust and crusts so that the sculptures regained their original aspect. 相似文献
7.
Mary A. Anderson Frank Bowles C. O. Taiwo Jan D. Beckmann L. J. Lewis James R. Liesch Godfrey N. Brown H. L. Elvin Shib K. Mitra Richard F. Behrendt Graeme Kemelfield Hugh W. R. Hawes W. A. Dodd A. L. Tibawi 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1971,17(2):220-251
8.
Friedrich Edding G. W. Parkyn Renzo Titone Oskar Anweiler Frederic Lilge John Vaizey Werner Levi B. Magierska Walter Schultze Mary Ewen Ulich Ben Morris Ignacy SzAniawski G. de Landsheere M. L. Kellmer Pringle W. Lenz Rudolf Haas John Bradley Josip Lukatela M. J. Langeveld S. Wiegersma H. H. Stern H. P. Rickman 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1963,8(3-4):471-498
9.
10.