全文获取类型
收费全文 | 1239篇 |
免费 | 16篇 |
专业分类
教育 | 998篇 |
科学研究 | 78篇 |
各国文化 | 12篇 |
体育 | 45篇 |
文化理论 | 13篇 |
信息传播 | 109篇 |
出版年
2022年 | 8篇 |
2021年 | 14篇 |
2020年 | 12篇 |
2019年 | 20篇 |
2018年 | 31篇 |
2017年 | 26篇 |
2016年 | 31篇 |
2015年 | 14篇 |
2014年 | 20篇 |
2013年 | 310篇 |
2012年 | 20篇 |
2011年 | 21篇 |
2010年 | 19篇 |
2009年 | 23篇 |
2008年 | 26篇 |
2007年 | 29篇 |
2006年 | 20篇 |
2005年 | 23篇 |
2004年 | 26篇 |
2003年 | 21篇 |
2002年 | 39篇 |
2001年 | 26篇 |
2000年 | 21篇 |
1999年 | 24篇 |
1998年 | 12篇 |
1997年 | 20篇 |
1996年 | 15篇 |
1995年 | 17篇 |
1994年 | 18篇 |
1993年 | 14篇 |
1992年 | 14篇 |
1991年 | 14篇 |
1990年 | 18篇 |
1989年 | 20篇 |
1988年 | 16篇 |
1987年 | 14篇 |
1986年 | 9篇 |
1985年 | 11篇 |
1984年 | 15篇 |
1983年 | 10篇 |
1982年 | 18篇 |
1981年 | 10篇 |
1980年 | 16篇 |
1979年 | 14篇 |
1978年 | 10篇 |
1977年 | 11篇 |
1976年 | 15篇 |
1975年 | 8篇 |
1968年 | 7篇 |
1967年 | 8篇 |
排序方式: 共有1255条查询结果,搜索用时 15 毫秒
1.
S Grant T Hasler C Davies T C Aitchison J Wilson A Whittaker 《Journal of sports sciences》2001,19(7):499-505
There is limited information on the anthropometry, strength, endurance and flexibility of female rock climbers. The aim of this study was to compare these characteristics in three groups of females: Group 1 comprised 10 elite climbers aged 31.3 +/- 5.0 years (mean +/- s) who had led to a standard of 'hard very severe'; Group 2 consisted of 10 recreational climbers aged 24.1 +/- 4.0 years who had led to a standard of 'severe'; and Group 3 comprised 10 physically active individuals aged 28.5 +/- 5.0 years who had not previously rock-climbed. The tests included finger strength (grip strength, finger strength measured on climbing-specific apparatus), flexibility, bent arm hang and pull-ups. Regression procedures (analysis of covariance) were used to examine the influence of body mass, leg length, height and age. For finger strength, the elite climbers recorded significantly higher values (P < 0.05) than the recreational climbers and non-climbers (four fingers, right hand: elite 321 +/- 18 N, recreational 251 +/- 14 N, non-climbers 256 +/- 15 N; four fingers, left hand: elite 307 +/- 14 N, recreational 248 +/- 12 N, non-climbers 243 +/- 11 N). For grip strength of the right hand, the elite climbers recorded significantly higher values than the recreational climbers only (elite 338 +/- 12 N, recreational 289 +/- 10 N, non-climbers 307 +/- 11 N). The results suggest that elite climbers have greater finger strength than recreational climbers and non-climbers. 相似文献
2.
The Concept of Record in Interactive, Experiential and Dynamic Environments: the View of InterPARES*
This article presents the concept of electronic record as articulated by the first phase of the InterPARES (International research on Permanent Authentic Records in Electronic Systems) Project (1999–2001) and discusses it in light of the findings of the second phase of the Project (2002–2006). While InterPARES 1 focused on records produced and/or maintained in databases and document management systems, InterPARES 2 examined records produced and/or maintained in interactive, experiential and dynamic environments. The authors describe the characteristics of these environments and of the entities found in them in the course of case studies conducted on systems used for carrying out artistic, scientific and e-government activities, and propose the new concept of record that InterPARES 2 is eleborating, which expands on that formulated by InterPARES 1.The authors would like to thank InterPARES 2 research assistant Randy Preston for his careful editing and constructive criticisms. Some of his suggestions have been incorporated in the text of this article. 相似文献
3.
Caty Borum Chattoo Patricia Aufderheide Kenneth Merrill Modupeola Oyebolu 《广播与电子媒介杂志》2018,62(3):495-513
Where are diverse makers and subjects most likely to be found in U.S. TV documentary? This study compares commercial and public TV series, and also anthology formats (“authorial” series) and executive-produced formats. A content analysis for characters and makers showed that public TV authorial series are more diverse than either commercial or other public TV series. Independent documentaries have diversity value both in commercial and public TV settings. 相似文献
4.
At the turn of the last century there was an ever increasing world demand for pearls while at the same time their known fishing grounds were becoming exhausted. Some way of artificially increasing their production was obviously desirable, and the problem attracted considerable effort. It was an attempt to exploit a scientifically poorly understood phenomenon, and it is interesting, in retrospect, to relate these attempts to recent concepts of biomineralisation. Pearls are, of course, the layers of aragonitic calcium carbonate secreted by molluscs. 相似文献
5.
6.
7.
8.
9.
10.
This paper addresses a wicked problem faced by leaders wanting to be evidence informed in their choices of school improvement priorities and the most productive leadership practices to enact in pursuing those priorities. While local contexts will always be central to these choices, results of research ought to provide useful points of departure. But determining what relevant evidence recommends, local context aside, is far more difficult that the admonition to be ‘evidence informed’ seems to imply and the research community has offered few systematic solutions to the problem. This paper offers one possible solution, the calculation of ‘Power Indices’ using, for the purposes of illustration, evidence about the effects of a selected set of potential school improvement priorities (teachers’ emotions) on student learning, in combination with evidence about the effects on teacher emotions of a selected set of transformational leadership practices. Results argue for the value of a unique line of future research enabling school leaders to make choices about both school improvement priorities and how they might best pursue those priorities that systematically reflect the results of relevant evidence. 相似文献