全文获取类型
| 收费全文 | 28227篇 |
| 免费 | 247篇 |
| 国内免费 | 54篇 |
专业分类
| 教育 | 21034篇 |
| 科学研究 | 2457篇 |
| 各国文化 | 173篇 |
| 体育 | 1534篇 |
| 综合类 | 44篇 |
| 文化理论 | 461篇 |
| 信息传播 | 2825篇 |
出版年
| 2022年 | 92篇 |
| 2021年 | 184篇 |
| 2020年 | 230篇 |
| 2019年 | 365篇 |
| 2018年 | 2654篇 |
| 2017年 | 2617篇 |
| 2016年 | 2070篇 |
| 2015年 | 454篇 |
| 2014年 | 564篇 |
| 2013年 | 3420篇 |
| 2012年 | 678篇 |
| 2011年 | 1223篇 |
| 2010年 | 1276篇 |
| 2009年 | 824篇 |
| 2008年 | 1058篇 |
| 2007年 | 1573篇 |
| 2006年 | 470篇 |
| 2005年 | 743篇 |
| 2004年 | 711篇 |
| 2003年 | 614篇 |
| 2002年 | 356篇 |
| 2001年 | 367篇 |
| 2000年 | 308篇 |
| 1999年 | 246篇 |
| 1998年 | 156篇 |
| 1997年 | 170篇 |
| 1996年 | 168篇 |
| 1995年 | 140篇 |
| 1994年 | 150篇 |
| 1993年 | 134篇 |
| 1992年 | 211篇 |
| 1991年 | 212篇 |
| 1990年 | 234篇 |
| 1989年 | 214篇 |
| 1988年 | 173篇 |
| 1987年 | 183篇 |
| 1986年 | 186篇 |
| 1985年 | 175篇 |
| 1984年 | 179篇 |
| 1983年 | 168篇 |
| 1982年 | 134篇 |
| 1981年 | 136篇 |
| 1980年 | 132篇 |
| 1979年 | 191篇 |
| 1978年 | 154篇 |
| 1977年 | 97篇 |
| 1976年 | 108篇 |
| 1975年 | 101篇 |
| 1973年 | 97篇 |
| 1971年 | 101篇 |
排序方式： 共有10000条查询结果，搜索用时 15 毫秒
951.
Robert L. Brennan 《Educational Measurement》2000,19(1):5-10
In what sense is generalizability theory an extension of classical test theory? In what sense is generalizability theory an application of analysis of variance. 相似文献
952.
953.
954.
G W Gayle R L Pohlman R M Glaser G M Davis 《Research quarterly for exercise and sport》1990,61(3):224-232
The purpose of the present study was to determine the effects of 10-in [0.25-m] versus 16-in [0.41-m] wheelchair handrims on cardiorespiratory and psychophysiological exercise responses during wheelchair propulsion at selected velocities. Fifteen male paraplegics (27.0 +/- 5.5 yrs) performed three discontinuous exercise tests (ACE = arm crank ergometer; WERG = wheelchair roller ergometer) and two 1600-m performance-based track trials (TRACK) under simulated race conditions. There were no significant differences in HR, VO2, VE, HLa, or category-ratio ratings of perceived exertion (RPE) using different handrims during wheelchair propulsion at 4 km.h-1. In contrast, at 8 km.h-1 subjects demonstrated a 13% lower steady state VO2 (p less than .05) using the 10-in handrims, coincident with a 23% lower VE. Steady state HR during WERG at 8 km.h-1 using the 10-in (124.4 +/- 3.9 b.min-1) or 16-in (130.6 +/- 4.6 b.min-1) handrims were not significantly different. There were also no significant differences between ACE or WERG conditions during maximal effort for VO2 or VE. However, HRpeak during ACE was 7% higher than HRpeak during WERG16 (183 +/- 15 b.min-1 vs. 171 +/- 12 b.min-1, p less than .05), and whole blood HLa during ACE was also significantly higher (by 2.3-2.5 mmol; p less than .05) compared to WERG. There were no significant differences for HR, performance time, or RPE between trials using different handrim diameters during the 1600-m event.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
955.
956.
957.
958.
Walter Herzog 《Sportwissenschaft》2007,37(2):227-231
959.
960.