全文获取类型
收费全文 | 3748篇 |
免费 | 58篇 |
国内免费 | 17篇 |
专业分类
教育 | 2718篇 |
科学研究 | 304篇 |
各国文化 | 37篇 |
体育 | 435篇 |
综合类 | 29篇 |
文化理论 | 63篇 |
信息传播 | 237篇 |
出版年
2023年 | 21篇 |
2022年 | 66篇 |
2021年 | 86篇 |
2020年 | 128篇 |
2019年 | 225篇 |
2018年 | 261篇 |
2017年 | 246篇 |
2016年 | 212篇 |
2015年 | 134篇 |
2014年 | 127篇 |
2013年 | 660篇 |
2012年 | 123篇 |
2011年 | 107篇 |
2010年 | 87篇 |
2009年 | 78篇 |
2008年 | 65篇 |
2007年 | 87篇 |
2006年 | 87篇 |
2005年 | 75篇 |
2004年 | 68篇 |
2003年 | 116篇 |
2002年 | 133篇 |
2001年 | 128篇 |
2000年 | 78篇 |
1999年 | 37篇 |
1998年 | 24篇 |
1997年 | 25篇 |
1996年 | 23篇 |
1995年 | 25篇 |
1994年 | 18篇 |
1993年 | 22篇 |
1992年 | 14篇 |
1991年 | 18篇 |
1990年 | 24篇 |
1989年 | 9篇 |
1988年 | 7篇 |
1987年 | 15篇 |
1986年 | 12篇 |
1985年 | 15篇 |
1984年 | 11篇 |
1983年 | 5篇 |
1982年 | 8篇 |
1981年 | 6篇 |
1980年 | 7篇 |
1978年 | 16篇 |
1977年 | 8篇 |
1976年 | 6篇 |
1974年 | 5篇 |
1973年 | 8篇 |
1865年 | 4篇 |
排序方式: 共有3823条查询结果,搜索用时 180 毫秒
151.
152.
H. Drábková 《High Ability Studies》1991,1(2):191-196
A cohort of 71 pairs of twins was studied in a project which started within the decade 1965 to 1975. The total level of intelligence (global IQ) and the level of particular intellectual components have been examined annually since the twins were two years of age. The data were analysed by comparing monozygotic and dizygotic twins. The results revealed that high intelligence is influenced much more by hereditary than exogenous factors. Furthermore, there is an irregularity in the development of intellectual level from childhood to adulthood. Consequently, decision making about children cannot be carried out on the basis of a single IQ evaluation. A cluster analysis demonstrated the importance of hereditary factors not only on intellectual level, but also on the pattern of intellectual development. 相似文献
153.
This study analyzes publishing patterns of the staff of the University of Ibadan College of Medicine, Nigeria, based on a bibliography prepared by the authors. Data-gathering for the bibliography is described. An analysis is made of journals staff published in for the period 1961-1980, focusing on changes in journal order rank, publishing locations, and subject spread. A ranked list of the leading journals for the period 1976-1980 is given, showing the importance of local publishing and pointing to the need for local indexing. 相似文献
154.
155.
156.
关于广东省普通高校体育专业招生考试足球项目考试内容、方法及评分标准的研究 总被引:1,自引:0,他引:1
采用调查访问、实验法对广东省普通高校体育专业招生考试足球项目考试内容、方法及评分标准进行研究,通过研究.足球非专项考试难度偏低的问题、足球专项考试方法中颠球、绕杆射门项目考试难度偏低以及踢准项目偏难等问题得到解决,从而确立了广东省新的足球专项、非专项考试的各项内容、方法及评分标准,为广东省考试中心组织实施2005年广东省普通高校体育专业招生考试提供了具有实效性和科学性的保证。 相似文献
157.
Conclusions We are living a deep change in the information transfer process involving the different actors of the editorial scene (from
authors to editors, web-editors, e-publishers and readers), who occasionally play different roles at the same time (e.g.,
authors sometimes bypass the editor thus assuming direct responsibilities in the diffusion of documents in the Internet).
Furthermore, information producers, managers or seekers often show twofold personalities like Dr. Jekyll and Mr. Hyde. They
would like to find all documents free on the Internet and be able to read original, reliable, and high quality information,
but they are sometimes reluctant to spread their papers through online nonofficial channels as they care for the impact factor,
prestige, and career advancement.
It is a revolutionary period in which new and alternative forms of scholarly communication live together with more traditional
ones and the future is difficult to define. Recent initiatives of open access—such as Pubmed Central, Public Library of Science,
Budapest Open Access Initiative—are contributing to define new trends in the editorial market, challenging the traditional
distribution channels, mainly managed by commercial editors, and placing the authors’ role and publication copyrights under
severe discussion.
In this landscape, GL now has new dignity and becomes closer and closer to innovative scientific publications supported by
researchers in view of a generalised movement towards open access. The nuances of grey are becoming lighter and lighter. The
questions are many, the answers few, but, in any case, the ethical responsibility of producing and issuing quality documents
can never be disregarded. 相似文献
158.
De Groote SL 《Medical reference services quarterly》2000,19(4):1-13
Three MEDLINE Internet interfaces are compared: PubMed, Internet Grateful Med, and Ovid MEDLINE. Although these interfaces all search MEDLINE, significant differences exist in terms of their search interfaces, presentation of results, and special features. This paper examines these variations and explores some of the advantages and disadvantages of the three interfaces. 相似文献
159.
Several studies concluded that deep reflection is infrequently reached in student portfolios. An explanation for these disappointing conclusions might be that motivation for portfolio reflection determines the quality of reflection. This study aimed to examine the relationship between motivation for using digital portfolios and reflection. Participants were 156 eleventh-grade students in secondary education, whose motivation for composing a digital portfolio was measured by the motivation part of the Motivated Strategies for Learning Questionnaire. Portfolios of 37 of the 156 students were examined in terms of the amount and nature of reflection by means of a coding scheme based on Mezirow's model of transformative learning. On average, one-fifth (19.5%) of the paragraphs in a portfolio contained reflection, and paragraphs with deep reflection were hardly found (0.8%). It was concluded that motivation for composing a portfolio was fair, but not related to the amount and nature of reflection. This exploratory study gives rise to further research into factors that might influence the quality of portfolio reflection. 相似文献
160.