全文获取类型
收费全文 | 24434篇 |
免费 | 289篇 |
国内免费 | 62篇 |
专业分类
教育 | 17523篇 |
科学研究 | 2212篇 |
各国文化 | 217篇 |
体育 | 1759篇 |
综合类 | 45篇 |
文化理论 | 131篇 |
信息传播 | 2898篇 |
出版年
2021年 | 275篇 |
2020年 | 360篇 |
2019年 | 524篇 |
2018年 | 773篇 |
2017年 | 788篇 |
2016年 | 732篇 |
2015年 | 474篇 |
2014年 | 692篇 |
2013年 | 4612篇 |
2012年 | 640篇 |
2011年 | 679篇 |
2010年 | 579篇 |
2009年 | 561篇 |
2008年 | 610篇 |
2007年 | 560篇 |
2006年 | 560篇 |
2005年 | 507篇 |
2004年 | 407篇 |
2003年 | 364篇 |
2002年 | 350篇 |
2001年 | 524篇 |
2000年 | 449篇 |
1999年 | 398篇 |
1998年 | 239篇 |
1997年 | 273篇 |
1996年 | 262篇 |
1995年 | 207篇 |
1994年 | 238篇 |
1993年 | 200篇 |
1992年 | 350篇 |
1991年 | 314篇 |
1990年 | 330篇 |
1989年 | 343篇 |
1988年 | 286篇 |
1987年 | 269篇 |
1986年 | 283篇 |
1985年 | 276篇 |
1984年 | 254篇 |
1983年 | 249篇 |
1982年 | 189篇 |
1981年 | 202篇 |
1980年 | 186篇 |
1979年 | 283篇 |
1978年 | 216篇 |
1977年 | 170篇 |
1976年 | 168篇 |
1975年 | 156篇 |
1974年 | 157篇 |
1973年 | 154篇 |
1971年 | 152篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
21.
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
22.
The purpose of this investigation was to describe the morphological parameters that characterize elite age group divers. Comparisons are made to normative age group data from the Coquitlam Growth Study and the constancy of important characteristics from age group to age group is examined. Data were collected on 27 male and 28 female elite divers who participated in the 1990 North American Age Group Diving Championships. Body build, body composition and skinfold corrected diameters were determined from 36 anthropometric parameters and analysed by ANOVA, t-test and Phantom z-scores procedures. All age groups except the 14- to 15-year-old males were significantly (P < or = 0.05) shorter than their norms but recorded higher androgyny index values. The estimated relative muscle mass increased significantly (P < or = 0.05) with age for males at all ages (40.8-46.3%). The 16- to 18-year-old females had a significantly (P < or = 0.05) larger relative muscle component compared to the younger age groups (40.1-38.4%). When normalized for height, active tissue development of the extremities was comparable between the sexes except in the forearm. The results indicate that at all age levels short stature is an important characteristic for divers. Analysis of regional active tissue development provides further insight into sport-specific prerequisites for success at elite levels. 相似文献
23.
L. DiANNE BORDERS 《Counselor Education & Supervision》1991,31(1):32-47
A multiple case study of four supervisors indicated that numerous factors shape supervisors' in-session performance and revealed a complex interplay between thoughts and behaviors. 相似文献
24.
25.
Thomas L. Bonn 《Publishing Research Quarterly》1993,9(1):3-19
New World Writing, a magazine founded by New American Library in 1952, quickly became an important vehicle for liberal intellectual
and literary thought. In addition to providing an outlet for new writing, the magazine became an important acquisitions tool
for NAL. Throughout its lifetime, New World Writing remained a showcase for many of the finest writers of the 1950s, including
Christopher Isherwood, Louis Auchincloss, Tennessee Williams, Flannery O’Connor, Jack Kerouac, and Gore Vidal.
He is the author of Under Cover: An Illustrated History of American Mass Market Paperbacksand Heavy Traffic and High Culture: The New American Library as Literary Gatekeeper. He is working on a study of American literary
agents 相似文献
26.
Deborah L. Bandalos 《Educational Measurement》2004,23(2):33-40
Recent implementation of Nebraska's Standards-based Teacher-led Assessment and Reporting System (STARS) introduced a unique opportunity to examine the benefits and drawbacks of a teacher-led state assessment system. STARS is unique among state assessment systems in that statewide tests are replaced by locally developed assessments designed by teachers. Benefits of this system are found to be greater teacher use of results for instructional planning, greater diagnostic utility of the assessments, and gains in assessment literacy. Disadvantages include the time-consuming and stressful nature of creating localized assessments. Compatibility of STARS with the requirements of the No Child Left Behind Act are discussed. 相似文献
27.
28.
29.
30.
L. Girolametto S. Bonifacio C. Visini E. Weitzman E. Zocconi P.S. Pearce 《International Journal of Early Years Education》2003,11(3):255-260
The aim was to examine cross-cultural variation in linguistic responsiveness to young children in 10 English-speaking mother–child dyads and 10 Italian-speaking mother– child dyads. All 20 children were late talkers who possessed delays in expressive vocabulary development but age-appropriate cognitive and receptive language skills. Dyads were filmed in 15 minute free play contexts, which were transcribed and coded for measures of maternal linguistic input (e.g. rate, MLU, labels, expansions) and child language productivity (e.g. utterances, different words used). The results revealed that the Italian mothers used more utterances, spoke more quickly and used a more diverse vocabulary than the Canadian mothers. The Italian children mirrored their mothers and also used more utterances and a more diverse vocabulary than the Canadian children. Mothers in both groups used similar percentages of responsive labels and expansions. However, Italian mothers responded to fewer of their children's vocalisations, using a smaller percentage of imitations and interpretations than the Canadian mothers. Correlations between maternal input and children's language productivity revealed that contingent language measures (e.g. imitations, interpretations, expansions) were related to high levels of productivity in children in both cultural groups. The results support the use of language interventions based on increasing maternal responsiveness for these children at the one-word stage of language development. They also point to differences that may be culturally based. For example, Italian mothers use faster rates of interaction and appear to have higher expectations for their children's verbal participation in interaction. This is reflected in higher rates of language production from their children, even though children in both cultural groups have similar vocabulary sizes. 相似文献