全文获取类型
收费全文 | 10262篇 |
免费 | 96篇 |
国内免费 | 4篇 |
专业分类
教育 | 7387篇 |
科学研究 | 1049篇 |
各国文化 | 92篇 |
体育 | 775篇 |
综合类 | 5篇 |
文化理论 | 67篇 |
信息传播 | 987篇 |
出版年
2020年 | 89篇 |
2019年 | 155篇 |
2018年 | 227篇 |
2017年 | 198篇 |
2016年 | 189篇 |
2015年 | 135篇 |
2014年 | 218篇 |
2013年 | 2040篇 |
2012年 | 235篇 |
2011年 | 239篇 |
2010年 | 227篇 |
2009年 | 218篇 |
2008年 | 192篇 |
2007年 | 171篇 |
2006年 | 182篇 |
2005年 | 129篇 |
2004年 | 145篇 |
2003年 | 111篇 |
2002年 | 123篇 |
2001年 | 150篇 |
2000年 | 148篇 |
1999年 | 133篇 |
1998年 | 100篇 |
1997年 | 102篇 |
1996年 | 145篇 |
1995年 | 160篇 |
1994年 | 120篇 |
1993年 | 152篇 |
1992年 | 181篇 |
1991年 | 180篇 |
1990年 | 162篇 |
1989年 | 129篇 |
1988年 | 107篇 |
1987年 | 122篇 |
1986年 | 103篇 |
1985年 | 117篇 |
1984年 | 113篇 |
1983年 | 114篇 |
1982年 | 121篇 |
1981年 | 93篇 |
1980年 | 109篇 |
1979年 | 162篇 |
1978年 | 138篇 |
1977年 | 138篇 |
1976年 | 105篇 |
1975年 | 79篇 |
1974年 | 98篇 |
1973年 | 82篇 |
1972年 | 72篇 |
1971年 | 72篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
12.
The many challenges faced by health sciences libraries of all types and sizes often require innovative solutions. When an innovative solution involves calculated risk taking, the approach is called intrapreneurial. At the University of Miami School of Medicine, an intrapreneurial approach solved the fiscal problems of the biomedical communications unit. The Louis Calder Memorial Library inherited these problems when the Department of the Library and Biomedical Communications was created in the early 1980s. In this paper, two intrapreneurial programs are described, and the benefit and suitability of this management style to information services are demonstrated. 相似文献
13.
Daryl F. Mellard Melinda McKnight Kari Woods 《Learning disabilities research & practice》2009,24(4):186-195
This study describes response to intervention (RTI) screening and progress‐monitoring instruments and procedures in 41 local school settings. For screening the schools most often used published reading assessments or commercial products; a three‐times‐per‐year screening schedule was most prevalent. For progress monitoring schools most often relied on published reading assessments; a weekly progress monitoring schedule was most prevalent. The variability between local school practices is discussed with regard to efficiency, equity, and viability of RTI. 相似文献
14.
15.
16.
17.
This paper explores Roger Revelle's activities in oceanography and institution-building during and after the Second World War. In particular, it explores his shift from a wartime acceptance of science serving mission-oriented objectives, to a defence ofthe distinction between basic and applied science. For Revelle, the Federal government, and especially the military, became theguarantor of basic research in oceanography. This understanding led him to privilege military sponsorship over contract research,and the physical over the biological sciences. He drew upon that understanding to construct a unique institutional geography for science in southern California. 相似文献
18.
19.
20.
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