全文获取类型
收费全文 | 22287篇 |
免费 | 279篇 |
国内免费 | 57篇 |
专业分类
教育 | 16079篇 |
科学研究 | 2015篇 |
各国文化 | 187篇 |
体育 | 1496篇 |
综合类 | 51篇 |
文化理论 | 216篇 |
信息传播 | 2579篇 |
出版年
2021年 | 198篇 |
2020年 | 267篇 |
2019年 | 401篇 |
2018年 | 1189篇 |
2017年 | 1252篇 |
2016年 | 996篇 |
2015年 | 421篇 |
2014年 | 554篇 |
2013年 | 3805篇 |
2012年 | 603篇 |
2011年 | 840篇 |
2010年 | 763篇 |
2009年 | 593篇 |
2008年 | 663篇 |
2007年 | 760篇 |
2006年 | 465篇 |
2005年 | 505篇 |
2004年 | 434篇 |
2003年 | 374篇 |
2002年 | 294篇 |
2001年 | 441篇 |
2000年 | 362篇 |
1999年 | 298篇 |
1998年 | 206篇 |
1997年 | 190篇 |
1996年 | 191篇 |
1995年 | 148篇 |
1994年 | 167篇 |
1993年 | 139篇 |
1992年 | 237篇 |
1991年 | 225篇 |
1990年 | 247篇 |
1989年 | 229篇 |
1988年 | 190篇 |
1987年 | 196篇 |
1986年 | 201篇 |
1985年 | 197篇 |
1984年 | 192篇 |
1983年 | 166篇 |
1982年 | 141篇 |
1981年 | 142篇 |
1980年 | 130篇 |
1979年 | 201篇 |
1978年 | 168篇 |
1977年 | 117篇 |
1976年 | 121篇 |
1975年 | 113篇 |
1974年 | 105篇 |
1973年 | 109篇 |
1971年 | 117篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
Thomas L. Bonn 《Publishing Research Quarterly》1994,10(1):55-65
The role of the literary agent and the reception granted agents by publishers have changed markedly over the course of the
twentieth century. Henry Holt’s views of agents, written in the first decade of the century, help define the status and activities
of agents at that time. These are compared with the role of agents today, using archival sources, the book trade literature,
and interviews.
Thomas L. Bonn, review editor of this journal, is a librarian, Library at State University College at Cortland. He is the
author ofUnder Cover: An Illustrated History of American Mass Market Paperbacks andHeavy 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
22.
23.
24.
25.
26.
V. J. Hinton D. C. De Vivo R. Fee E. Goldstein Y. Stern 《Learning disabilities research & practice》2004,19(3):146-154
Duchenne Muscular Dystrophy (DMD) is a neurogenetic developmental disorder that presents with progressive muscular weakness. It is caused by a mutation in a gene that results in the absence of specific products that normally localize to muscle cells and the central nervous system (CNS). The majority of affected individuals have IQs within the normal range, generally with lower verbal than performance IQ scores. Prior work has demonstrated selective deficits on tests of verbal span and immediate memory. For the current study, 26 boys with DMD (and normal intellectual function) and their unaffected siblings were evaluated. Paired comparisons demonstrated that the children with DMD had significantly poorer academic achievement scores than their siblings, even though their vocabulary levels and home and educational environments were comparable. Children with DMD also had more behavioral concerns, physical disabilities, and poorer verbal memory spans. Linear regression indicated that behavioral concerns, executive function, and physical disability did not contribute substantially to academic performance, whereas performance on verbal span did. DMD presents with a selective developmental aberration in verbal span that has wide‐ranging consequences on learning skills. 相似文献
27.
L A Colaianni 《Bulletin of the Medical Library Association》1992,80(1):1-8
The 1991 Janet Doe lecturer describes the vision held by the founders of the Medical Library Association of medical information being readily accessible to health professionals no matter how far they were located from major medical centers, and traces the pursuit of this vision to current outreach activities. 相似文献
28.
29.
30.