全文获取类型
| 收费全文 | 20558篇 |
| 免费 | 278篇 |
| 国内免费 | 15篇 |
专业分类
| 教育 | 13922篇 |
| 科学研究 | 2142篇 |
| 各国文化 | 222篇 |
| 体育 | 1928篇 |
| 综合类 | 24篇 |
| 文化理论 | 150篇 |
| 信息传播 | 2463篇 |
出版年
| 2021年 | 166篇 |
| 2020年 | 279篇 |
| 2019年 | 423篇 |
| 2018年 | 519篇 |
| 2017年 | 554篇 |
| 2016年 | 510篇 |
| 2015年 | 326篇 |
| 2014年 | 434篇 |
| 2013年 | 3859篇 |
| 2012年 | 406篇 |
| 2011年 | 451篇 |
| 2010年 | 358篇 |
| 2009年 | 381篇 |
| 2008年 | 388篇 |
| 2007年 | 359篇 |
| 2006年 | 349篇 |
| 2005年 | 318篇 |
| 2004年 | 578篇 |
| 2003年 | 438篇 |
| 2002年 | 470篇 |
| 2001年 | 359篇 |
| 2000年 | 361篇 |
| 1999年 | 294篇 |
| 1998年 | 161篇 |
| 1997年 | 188篇 |
| 1996年 | 226篇 |
| 1995年 | 194篇 |
| 1994年 | 174篇 |
| 1993年 | 186篇 |
| 1992年 | 260篇 |
| 1991年 | 267篇 |
| 1990年 | 246篇 |
| 1989年 | 277篇 |
| 1988年 | 235篇 |
| 1987年 | 272篇 |
| 1986年 | 231篇 |
| 1985年 | 296篇 |
| 1984年 | 249篇 |
| 1983年 | 232篇 |
| 1982年 | 208篇 |
| 1981年 | 169篇 |
| 1980年 | 153篇 |
| 1979年 | 243篇 |
| 1978年 | 200篇 |
| 1977年 | 170篇 |
| 1976年 | 182篇 |
| 1975年 | 138篇 |
| 1974年 | 165篇 |
| 1973年 | 135篇 |
| 1971年 | 143篇 |
排序方式： 共有10000条查询结果，搜索用时 15 毫秒
971.
972.
973.
974.
Joel R. Levin Beverly J. Dretzke Michael Pressley Julia E. McGivern 《Contemporary educational psychology》1985,10(3):220-227
Previous research has indicated that the keyword method of vocabulary learning facilitates students' performance not just on simple tests of definition recall, but on comprehension-demanding tasks as well. The present study was conducted to determine whether the “comprehension” finding could be accounted for by keyword subjects' superior definition recall per se. The results generally supported that conclusion: When conditions and subjects within conditions were equated with respect to their initial levels of definition recall, the comprehension advantage of keyword subjects disappeared. 相似文献
975.
The purpose of this study was to determine how female marathon runners of varying standards differed in body composition and physique and in their training regimes, and secondly to develop predictors of distance running performance from the anthropometric and training variables. Female marathon runners (n = 36), all participants in a national 10 mile (16 km) road racing championship, were divided into three groups according to their best time for the 26.2 mile race. They were assessed for body composition and somatotype using anthropometric techniques and completed a questionnaire about their current training for the marathon. No difference was found between the groups of distance runners when measured for height, bone widths and circumferences. The three groups were found to have similar body weights of approximately 53 kg, a value which is much lower than the average for sedentary women, but which compares favourably with those from previous studies of female long distance runners. While all the runners had a lower per cent fat, as measured from skinfold thicknesses, than sedentary women, the elite runners were seen to have significantly lower values (P less than 0.05) than the other two groups. The difference in body fat was particularly reflected in the triceps skinfold value. There was also a tendency for the elite runners to be more ectomorphic and less endomorphic than the others. The better runners were seen, on the whole, to have been running longer, and to have more strenuous regimes, both in terms of intensity of training and distance run per week. Multiple regression and discriminant function analyses indicated that the number of training sessions per week and the number of years training were the best predictors of competitive performance at both 10 mile and marathon distances. They also indicated that a female long distance runner with a slim physique high in ectomorphy has the greatest potential for success. 相似文献
976.
Cinema Demand in Spain: A Cointegration Analysis 总被引：4，自引：3，他引：1
In this paper we explain the decline in cinema attendance in Spain since 1968. We use a cointegration analysis to estimate
an individual demand function for cinema, with annual data and in terms of average attendance per inhabitant. We find that
cinema is a luxury good and that its demand is elastic with respect to its price. We also show that television acts as a deterrent
with regard to cinema attendance.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
977.
978.
979.
980.