全文获取类型
| 收费全文 | 1776篇 |
| 免费 | 46篇 |
| 国内免费 | 1篇 |
专业分类
| 教育 | 1539篇 |
| 科学研究 | 27篇 |
| 各国文化 | 17篇 |
| 体育 | 54篇 |
| 文化理论 | 14篇 |
| 信息传播 | 172篇 |
出版年
| 2023年 | 6篇 |
| 2021年 | 11篇 |
| 2020年 | 26篇 |
| 2019年 | 35篇 |
| 2018年 | 48篇 |
| 2017年 | 42篇 |
| 2016年 | 49篇 |
| 2015年 | 32篇 |
| 2014年 | 46篇 |
| 2013年 | 381篇 |
| 2012年 | 63篇 |
| 2011年 | 62篇 |
| 2010年 | 55篇 |
| 2009年 | 52篇 |
| 2008年 | 51篇 |
| 2007年 | 52篇 |
| 2006年 | 58篇 |
| 2005年 | 49篇 |
| 2004年 | 41篇 |
| 2003年 | 37篇 |
| 2002年 | 45篇 |
| 2001年 | 28篇 |
| 2000年 | 37篇 |
| 1999年 | 30篇 |
| 1998年 | 23篇 |
| 1997年 | 22篇 |
| 1996年 | 22篇 |
| 1995年 | 29篇 |
| 1994年 | 20篇 |
| 1993年 | 21篇 |
| 1992年 | 23篇 |
| 1991年 | 19篇 |
| 1990年 | 26篇 |
| 1989年 | 23篇 |
| 1988年 | 17篇 |
| 1987年 | 17篇 |
| 1986年 | 17篇 |
| 1985年 | 20篇 |
| 1984年 | 16篇 |
| 1983年 | 14篇 |
| 1982年 | 18篇 |
| 1981年 | 24篇 |
| 1980年 | 10篇 |
| 1979年 | 13篇 |
| 1978年 | 9篇 |
| 1977年 | 19篇 |
| 1976年 | 10篇 |
| 1975年 | 9篇 |
| 1974年 | 14篇 |
| 1973年 | 6篇 |
排序方式： 共有1823条查询结果，搜索用时 31 毫秒
71.
Barbara Hall 《Children‘s Literature in Education》1980,11(3):127-128
72.
73.
74.
75.
Barbara Costello Government Documents Librarian Assistant Professor Robert Lenholt Electronic Services Librarian Assistant Professor Judson Stryker PhD Associate Dean Lynn Professor of Accounting 《The Journal of Academic Librarianship》2004,30(6):452-460
Studies show that recent generations of college students have a learning style with identifiable characteristics. Library instruction efforts must adapt to these learning styles. Course management software (CMS), such as Blackboard, is one resource available to academic librarians to meet the challenges posed by the "Net Generation." At Stetson University, the use of Blackboard courseware in library instruction sessions successfully addressed the unique learning styles of students. 相似文献
76.
77.
78.
79.
80.
Energy balance of locomotion with pedal-driven watercraft 总被引：1，自引：0，他引：1
In this study, we examined the mechanics and energetics of locomotion with a paddle-wheel boat and a water bike. Power output (Wtot) was measured directly on the water bike by means of an instrumented chain-ring. The simultaneous assessment of oxygen uptake (VO2) allowed the computation of the "overall" efficiency of locomotion (etao = Wtot/VO2). Mean etao was 0.27 (s = 0.02), which was unaffected by the speed, and was assumed to be the same for the two boats as both are semi-recumbent bicycles. For the paddle-wheel boat, Wtot was then obtained from etao and measures of VO2. The power to overcome (passive) drag was calculated as Wd = D x v (where D is the force measured by means of a load cell when towing the boats at given speeds). Propelling efficiency was calculated as etap = Wd/Wtot, which was lower with the paddle-wheel boat (mean 0.35, s = 0.01) than with the water bike (mean 0.57, s = 0.01). The observed differences in etap and Wd explain why at the highest speed tested (approximately 3 m s(-1), the energy required to cover a unit distance with the water bike is similar to that required to move the paddle-wheel boat at 1.3 m s-1). 相似文献