全文获取类型
收费全文 | 2346篇 |
免费 | 53篇 |
国内免费 | 3篇 |
专业分类
教育 | 1763篇 |
科学研究 | 85篇 |
各国文化 | 23篇 |
体育 | 264篇 |
综合类 | 2篇 |
文化理论 | 20篇 |
信息传播 | 245篇 |
出版年
2023年 | 13篇 |
2022年 | 9篇 |
2021年 | 18篇 |
2020年 | 44篇 |
2019年 | 86篇 |
2018年 | 78篇 |
2017年 | 85篇 |
2016年 | 93篇 |
2015年 | 68篇 |
2014年 | 71篇 |
2013年 | 542篇 |
2012年 | 46篇 |
2011年 | 59篇 |
2010年 | 52篇 |
2009年 | 50篇 |
2008年 | 64篇 |
2007年 | 75篇 |
2006年 | 48篇 |
2005年 | 43篇 |
2004年 | 45篇 |
2003年 | 52篇 |
2002年 | 48篇 |
2001年 | 36篇 |
2000年 | 54篇 |
1999年 | 43篇 |
1998年 | 28篇 |
1997年 | 19篇 |
1996年 | 28篇 |
1995年 | 19篇 |
1994年 | 32篇 |
1993年 | 27篇 |
1992年 | 32篇 |
1991年 | 26篇 |
1990年 | 18篇 |
1989年 | 25篇 |
1988年 | 25篇 |
1987年 | 20篇 |
1986年 | 23篇 |
1985年 | 24篇 |
1984年 | 26篇 |
1983年 | 20篇 |
1982年 | 24篇 |
1981年 | 24篇 |
1980年 | 9篇 |
1979年 | 12篇 |
1978年 | 11篇 |
1977年 | 10篇 |
1975年 | 13篇 |
1974年 | 8篇 |
1973年 | 9篇 |
排序方式: 共有2402条查询结果,搜索用时 15 毫秒
1.
2.
3.
Judith Palmer 《Health information and libraries journal》1994,11(4):282-286
4.
5.
1 Introduction New technologies and other developments haye changedthe information seeking behaviors of the academic communityand the general public.Nowhere is this more evident than inthe exponential growth of the World Wide Web and cellularphone usage.Responding to these user needs and newtechnologies,libraries are moving from being InformationWarehouses to becoming Information Portals.Full-text 相似文献
6.
Delmus Williams 《The Journal of Academic Librarianship》2008,34(1):85-86
7.
8.
The aim of this study was to examine the relationship between indicators of risk of disordered eating, body image and varied menstrual cycle lengths. Altogether, 151 female athletes were invited from 16 sports and 70 female non-athletic controls were recruited from a university lecture class. The participants completed several surveys, including demographics, menstrual cycle history, physical activity, Eating Disorder Inventory (EDI) and the Three Factor Eating Questionnaire (TFEQ). Selected EDI subscales were summed to reflect eating disorder risk and body image. Menstrual cyclicity was based on self-reported cycle length for the last 6 months (normal cycles = 26-32 days, irregular cycles < or =26 or >32 days). Athletes overall had more irregular cycles (29.1%) than the non-athletes (15.7%) (P < 0.05). There were significant differences in scores for eating disorder risk, body dissatisfaction, drive for thinness, cognitive restraint (TFEQ) and disinhibition (TFEQ), only when athletes were divided based on menstrual cyclicity (i.e. irregularly cycling athletes had higher scores than athletes with normal menstrual cycle lengths). No differences in these scores were found between non-athletes with normal or irregular menstrual cycle lengths. In conclusion, irregularly short or long menstrual cycle length is associated with subtle indications of higher risk of disordered eating in female athletes. 相似文献
9.
Formulae are derived for the deflection surface of a symmetrically loaded circular plate having several points supports which are situated at equal distances apart on a single concentric circle. There is no restriction on the diameter of the support circle, which may be as large as the diameter of the plate itself. The results of this paper compare favorably with published experimental results. Numerical deflection coefficients for a uniformly loaded plate are provided, and these could be utilized for optimizing the positions and the number of concentrated supports. 相似文献
10.