全文获取类型
收费全文 | 947篇 |
免费 | 17篇 |
国内免费 | 1篇 |
专业分类
教育 | 761篇 |
科学研究 | 42篇 |
各国文化 | 8篇 |
体育 | 87篇 |
文化理论 | 2篇 |
信息传播 | 65篇 |
出版年
2023年 | 5篇 |
2022年 | 10篇 |
2021年 | 11篇 |
2020年 | 19篇 |
2019年 | 29篇 |
2018年 | 46篇 |
2017年 | 47篇 |
2016年 | 44篇 |
2015年 | 27篇 |
2014年 | 25篇 |
2013年 | 186篇 |
2012年 | 27篇 |
2011年 | 25篇 |
2010年 | 22篇 |
2009年 | 34篇 |
2008年 | 20篇 |
2007年 | 31篇 |
2006年 | 25篇 |
2005年 | 21篇 |
2004年 | 18篇 |
2003年 | 20篇 |
2002年 | 17篇 |
2001年 | 16篇 |
2000年 | 19篇 |
1999年 | 14篇 |
1998年 | 8篇 |
1997年 | 7篇 |
1996年 | 14篇 |
1995年 | 8篇 |
1994年 | 9篇 |
1993年 | 12篇 |
1992年 | 5篇 |
1991年 | 7篇 |
1990年 | 3篇 |
1989年 | 9篇 |
1988年 | 13篇 |
1987年 | 15篇 |
1986年 | 4篇 |
1985年 | 10篇 |
1984年 | 10篇 |
1983年 | 10篇 |
1982年 | 5篇 |
1981年 | 6篇 |
1980年 | 3篇 |
1979年 | 3篇 |
1977年 | 10篇 |
1976年 | 4篇 |
1968年 | 2篇 |
1857年 | 6篇 |
1840年 | 2篇 |
排序方式: 共有965条查询结果,搜索用时 15 毫秒
71.
Roberts P 《Endeavour》2011,35(4):142-150
In 1911-1912 Roald Amundsen and Robert Falcon Scott led rival parties in a race to the geographic South Pole. While both parties reached the Pole--Amundsen first--Scott's men died on the return journey. Amundsen became a Norwegian icon through his record-setting travels; Scott became a symbol of courage and devotion to science. The memory of each was invoked at various points during the twentieth century in the context of contemporary Antarctic events. Scott's status as a scientific figure was central to the Scott Polar Research Institute, while Amundsen's lack of scientific legacy became a way for British polar explorers to differentiate themselves from Norwegian contemporaries during the interwar years. After 1945 Scott and Amundsen were again invoked as exemplars of national polar achievement, even as the rise of large-scale science on the continent overshadowed past British and Norwegian achievements. In the present Amundsen and Scott remain wedded to particular values, focused respectively on national achievement and sacrifice in the name of science, while their race has become secondary. 相似文献
72.
Searching for randomised controlled trials and clinical controlled trials in Thai online bibliographical biomedical databases 总被引:1,自引:1,他引:0
Background: Thailand is a poor but highly literate country in South‐East Asia with over 60 million people. A lot of biomedical research is undertaken but dissemination is limited. Objectives: To identify relevant Thai bibliographic databases and investigate accessibility, functionality and content, particularly in relation to randomised controlled trials (RCTs) and clinical controlled trials (CCTs). Methods: A systematic search for institutions productive of research and the databases in their libraries. Search each accessible database in both Thai and English, recording the functionality and content. Assess accessibility of the retrieved RCTs or CCTs by comparing to Pub Med holdings. Results: We found 32 different databases (29 accessible in UK) of various sizes, coverage and functionality but many with unique records of RCTs and CCTs (total, n = 781). Two hundred and nine of 781 trials were accessible on Pub Med (27%). However, 641 of the 781 trial records contain text in both English and Thai (82%) and 112 records were solely English (14%). Conclusions: Those undertaking comprehensive searches for RCTs/CCTs should, in addition to a Pub Med , search the Thai Medical Index and Thai Index Medicus databases, and the Khon Kaen University Library Catalogue. 相似文献
73.
We examined the hypothesis that congruence between motivational dominance and state results in optimal psychological responses and performance during exercise. Twenty participants (10 telic dominant and 10 paratelic dominant) rated their stress at 5 min intervals as they cycled on an ergometer at gas exchange threshold for 30 min in both telic and paratelic state manipulated conditions. Participants then performed a test to exhaustion at a resistance equivalent to 110% of VO(2max). The hypothesized interaction between condition and dominance was significant for internal tension stress, as paratelic dominants were more stressed than telic dominants when exercising in the telic state and telic dominants were more stressed than paratelic dominants when exercising in the paratelic state. Similarly, the condition × dominance interaction for internal stress discrepancy was significant, as paratelic dominants reported greater internal stress discrepancy exercising in the telic compared with the paratelic state. Findings are discussed in relation to the application of reversal theory for understanding stress responses during aerobic exercise. 相似文献
74.
75.
Roberts Garrett J. Hall Colby Cho Eunsoo Cot Brooke Lee Jihyun Qi Bingxin Van Ooyik Jacklyn 《Educational Psychology Review》2022,34(1):335-361
Educational Psychology Review - This best-evidence synthesis reviews the past 20 years of rigorous reading intervention research to identify effective programs of instruction for Grade K–3... 相似文献
76.
77.
78.
79.
David Roberts 《Distance Education》1984,5(1):50-71
This paper begins by defining the term ‘student drop‐out’. Data are presented showing that the time that an external student is at greatest risk of becoming a drop‐out is during the first term, semester or year of study.
The reasons for this phenomenon are explored in the light of the theories of three writers in the field of distance education, namely, Otto Peters, Börje Holmberg and David Sewart.
The paper concludes by listing a number of suggestions that might be adopted in order to reduce early attrition rates and generally improve the functioning of distance education institutions. 相似文献
80.
This second part of a two-part paper describes how the University of California, San Francisco (UCSF) Library implemented a bibliographic control system for a medical illustrations collection. Discussed are the staffing of the project, the design of formats and computer programs, further design changes, the input process, quality evaluation of the illustrations, and production and distribution of the control products (printed indexes and microfiche replicas). The report ends with a note on the applicability of the UCSF system to other libraries, and some benefits of the project. 相似文献