全文获取类型
收费全文 | 8051篇 |
免费 | 102篇 |
国内免费 | 3篇 |
专业分类
教育 | 5605篇 |
科学研究 | 972篇 |
各国文化 | 80篇 |
体育 | 554篇 |
综合类 | 3篇 |
文化理论 | 59篇 |
信息传播 | 883篇 |
出版年
2021年 | 74篇 |
2020年 | 93篇 |
2019年 | 155篇 |
2018年 | 213篇 |
2017年 | 189篇 |
2016年 | 181篇 |
2015年 | 116篇 |
2014年 | 151篇 |
2013年 | 1490篇 |
2012年 | 159篇 |
2011年 | 158篇 |
2010年 | 139篇 |
2009年 | 130篇 |
2008年 | 145篇 |
2007年 | 127篇 |
2006年 | 128篇 |
2005年 | 113篇 |
2004年 | 129篇 |
2003年 | 100篇 |
2002年 | 103篇 |
2001年 | 131篇 |
2000年 | 130篇 |
1999年 | 110篇 |
1998年 | 73篇 |
1997年 | 81篇 |
1996年 | 85篇 |
1995年 | 63篇 |
1994年 | 65篇 |
1993年 | 101篇 |
1992年 | 111篇 |
1991年 | 123篇 |
1990年 | 115篇 |
1989年 | 100篇 |
1988年 | 92篇 |
1987年 | 110篇 |
1986年 | 103篇 |
1985年 | 108篇 |
1984年 | 93篇 |
1983年 | 102篇 |
1982年 | 99篇 |
1981年 | 80篇 |
1980年 | 82篇 |
1979年 | 107篇 |
1978年 | 101篇 |
1977年 | 88篇 |
1976年 | 82篇 |
1974年 | 77篇 |
1973年 | 68篇 |
1972年 | 58篇 |
1971年 | 62篇 |
排序方式: 共有8156条查询结果,搜索用时 15 毫秒
11.
12.
A.F. Zahm 《Journal of The Franklin Institute》1948,245(4):331-336
13.
Anne W. Graves Russell Gersten Diane Haager 《Learning disabilities research & practice》2004,19(4):262-272
This study examined literacy instruction in 14 first‐grade classrooms of English learners (ELs) in three schools in a large urban school district in southern California over a two‐year period. Pre‐ and posttest measures of oral‐reading fluency for 186 first graders, representing 11 native languages, were the outcome data. Reading‐fluency data were examined in reference to ratings of literacy practices using the English Learners Classroom Observation Instrument (ELCOI). Results indicated a moderately strong correlation (r= 0.65) between ELCOI rating and gain in oral‐reading fluency at the end of first grade. We report patterns of ELs who read below the oral‐reading fluency benchmark thresholds and patterns of students who were ultimately labeled with learning disabilities. Instructional practices of teachers rated “high” and “low” are discussed. Educational implications and recommendations for future research are discussed. 相似文献
14.
15.
16.
17.
18.
The National Library of Medicine has had an enormous impact on health information services all over the world. Although NLM is primarily a national institution, it has become an important international resource by responding to requests from the international community. NLM has been influential in three major ways. First, NLM has provided a model for other national and regional health information services. Second, it has been a catalyst, in that MEDLARS and other services it provides formed the nucleus of many regional networks. NLM helped such networks get started by giving advice on how to set up services and build collections and by "training the trainers" on the MEDLARS system. Third, NLM has supported national and regional operations by providing the additional training and materials needed for day-to-day service. 相似文献
19.
20.
M F Jackson 《Bulletin of the Medical Library Association》1966,54(4):325-328
A user study of the Index Medicus done at the Walter Reed Army Medical Center included responses from a group of sixty researchers, clinicians, residents, and interns. An analysis of the questionnaire shows that, while all respondents use the Index Medicus, most use it to search for a specific subject or a specific author reference. Comments received were critical of the delay from the time of journal publication until the appearance of its citation in Index Medicus. Suggestions were offered concerning the type of publication most of the respondents would prefer. 相似文献