全文获取类型
| 收费全文 | 4430篇 |
| 免费 | 69篇 |
| 国内免费 | 17篇 |
专业分类
| 教育 | 3204篇 |
| 科学研究 | 378篇 |
| 各国文化 | 47篇 |
| 体育 | 502篇 |
| 综合类 | 29篇 |
| 文化理论 | 75篇 |
| 信息传播 | 281篇 |
出版年
| 2023年 | 25篇 |
| 2022年 | 66篇 |
| 2021年 | 103篇 |
| 2020年 | 166篇 |
| 2019年 | 262篇 |
| 2018年 | 324篇 |
| 2017年 | 304篇 |
| 2016年 | 250篇 |
| 2015年 | 164篇 |
| 2014年 | 152篇 |
| 2013年 | 799篇 |
| 2012年 | 156篇 |
| 2011年 | 140篇 |
| 2010年 | 103篇 |
| 2009年 | 95篇 |
| 2008年 | 81篇 |
| 2007年 | 104篇 |
| 2006年 | 95篇 |
| 2005年 | 80篇 |
| 2004年 | 71篇 |
| 2003年 | 128篇 |
| 2002年 | 140篇 |
| 2001年 | 143篇 |
| 2000年 | 87篇 |
| 1999年 | 45篇 |
| 1998年 | 27篇 |
| 1997年 | 34篇 |
| 1996年 | 26篇 |
| 1995年 | 34篇 |
| 1994年 | 19篇 |
| 1993年 | 22篇 |
| 1992年 | 19篇 |
| 1991年 | 19篇 |
| 1990年 | 25篇 |
| 1989年 | 11篇 |
| 1988年 | 9篇 |
| 1987年 | 17篇 |
| 1986年 | 12篇 |
| 1985年 | 16篇 |
| 1984年 | 13篇 |
| 1983年 | 5篇 |
| 1982年 | 9篇 |
| 1981年 | 11篇 |
| 1980年 | 7篇 |
| 1979年 | 5篇 |
| 1978年 | 16篇 |
| 1977年 | 6篇 |
| 1976年 | 7篇 |
| 1973年 | 7篇 |
| 1865年 | 4篇 |
排序方式： 共有4516条查询结果，搜索用时 31 毫秒
141.
De Groote SL 《Medical reference services quarterly》2000,19(4):1-13
Three MEDLINE Internet interfaces are compared: PubMed, Internet Grateful Med, and Ovid MEDLINE. Although these interfaces all search MEDLINE, significant differences exist in terms of their search interfaces, presentation of results, and special features. This paper examines these variations and explores some of the advantages and disadvantages of the three interfaces. 相似文献
142.
Several studies concluded that deep reflection is infrequently reached in student portfolios. An explanation for these disappointing conclusions might be that motivation for portfolio reflection determines the quality of reflection. This study aimed to examine the relationship between motivation for using digital portfolios and reflection. Participants were 156 eleventh-grade students in secondary education, whose motivation for composing a digital portfolio was measured by the motivation part of the Motivated Strategies for Learning Questionnaire. Portfolios of 37 of the 156 students were examined in terms of the amount and nature of reflection by means of a coding scheme based on Mezirow's model of transformative learning. On average, one-fifth (19.5%) of the paragraphs in a portfolio contained reflection, and paragraphs with deep reflection were hardly found (0.8%). It was concluded that motivation for composing a portfolio was fair, but not related to the amount and nature of reflection. This exploratory study gives rise to further research into factors that might influence the quality of portfolio reflection. 相似文献
143.
144.
This paper investigates the relationship between ability to detect changes in prosody and reading performance in Spanish. Participants were children aged 7–8 years. Their tasks consisted of reading words, reading non‐words, stressing non‐words and reproducing sequences of two, three or four non‐words by pressing the corresponding keys on the computer keyboard. Non‐word sequences were constructed with minimal non‐word pairs differing in a single phoneme (/kúpi/ ‐ /kúti/) or in the stress pattern (/mípa/ ‐ /mipá/). Results showed that performance on phoneme contrast sequences (e.g. /kúpi/ ‐ /kúti/) predicted word reading. In contrast, performance on stress contrast sequences (e.g. /mípa/ ‐ /mipá/) predicted non‐word reading, but only when two‐non‐word sequences were analysed. This suggests that stress sensitivity may be one of the factors related to reading fluency as most errors at reading non‐words consisted of false starts and pauses between syllables. Results also showed that stress sensitivity (scored in two non‐word sequences) predicted stress assignment, and that knowledge of stress rules predicted both word and non‐word reading. This suggests that stress sensitivity may help in learning stress rules, and that knowledge of stress rules is relevant for reading. 相似文献
145.
146.
147.
148.
149.
150.