全文获取类型
收费全文 | 35512篇 |
免费 | 564篇 |
国内免费 | 141篇 |
专业分类
教育 | 24818篇 |
科学研究 | 3316篇 |
各国文化 | 351篇 |
体育 | 3787篇 |
综合类 | 36篇 |
文化理论 | 334篇 |
信息传播 | 3575篇 |
出版年
2022年 | 292篇 |
2021年 | 438篇 |
2020年 | 671篇 |
2019年 | 1001篇 |
2018年 | 1359篇 |
2017年 | 1348篇 |
2016年 | 1160篇 |
2015年 | 750篇 |
2014年 | 1019篇 |
2013年 | 6608篇 |
2012年 | 1023篇 |
2011年 | 942篇 |
2010年 | 745篇 |
2009年 | 765篇 |
2008年 | 790篇 |
2007年 | 705篇 |
2006年 | 667篇 |
2005年 | 609篇 |
2004年 | 776篇 |
2003年 | 732篇 |
2002年 | 720篇 |
2001年 | 860篇 |
2000年 | 615篇 |
1999年 | 504篇 |
1998年 | 331篇 |
1997年 | 319篇 |
1996年 | 351篇 |
1995年 | 347篇 |
1994年 | 286篇 |
1993年 | 290篇 |
1992年 | 456篇 |
1991年 | 410篇 |
1990年 | 423篇 |
1989年 | 437篇 |
1988年 | 365篇 |
1987年 | 416篇 |
1986年 | 369篇 |
1985年 | 418篇 |
1984年 | 350篇 |
1983年 | 329篇 |
1982年 | 280篇 |
1981年 | 241篇 |
1980年 | 235篇 |
1979年 | 386篇 |
1978年 | 265篇 |
1977年 | 232篇 |
1976年 | 241篇 |
1975年 | 205篇 |
1974年 | 214篇 |
1971年 | 196篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
131.
132.
133.
134.
135.
136.
Jajko P 《Medical reference services quarterly》1992,11(2):67-78
Information specialists should provide a value-added service by supplementing their online searches with primary research. Primary research results in more up-to-date information from a broader spectrum of sources. The requester benefits from primary research by receiving a cost-effective and more comprehensive information package. The information professional benefits by acquiring a more in-depth knowledge of the subject, increasing awareness of important projects within the organization, and achieving recognition as a key information analyst. 相似文献
137.
Jajko P 《Medical reference services quarterly》1992,11(1):63-66
Successful hospital and corporate libraries offer customized resources and services to meet the needs of their dynamic organizations. Concepts such as customer-driven, service-oriented and value-added are central to these libraries. Serving decision makers and integrating the library into the decision-making process of the organization is critical. Future articles in this new column will further explore the underlying philosophies and the specialized resources and services that characterize these libraries. 相似文献
138.
This study was designed to examine children's attitudes toward the role of sports in determining social status, as well as the activities in which children prefer to participate. A total of 227 boys and 251 girls in Grades 4, 5, and 6 completed a questionnaire to determine which criteria were most important in determining personal, female, and male popularity. Personal popularity was answered by the girls and boys according to "what would make you well liked by your classmates." Female and male popularity was determined by asking both girls and boys to decide "what would make (girls, for female subjects, and boys, for male subjects) well liked by your classmates." A comparison of results from the Buchanan, Blankenbaker, and Cotten (1976) investigation and the present study indicated that, in the last 15 years, appearance has become more important and academic achievement less important in determining personal popularity for girls. For boys, the comparison revealed that sports have become more important and academic achievement less important in determining personal popularity. Boys reported sports to be the most important determinant of personal and male popularity and appearance as the most important determinant of female popularity. Sports and appearance became more important for boys with each higher grade level. Girls reported appearance to be the most important determinant of personal, male, and female popularity. For girls, appearance became more important with each higher grade level. A comparison of results from the Buchanan et al. (1976) and the present study indicated that the activities in which girls and boys preferred to participate have changed.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
139.
140.
Redmond M 《Government Information Quarterly》1986,3(3):291-303
"The U.S. Bureau of the Census created the State Data Center program in 1978 to improve public access to census information. This article discusses the background, structure, and services of that program; the role of libraries in the program; and future directions in State Data Center/library relationships. The appendix lists contact person names, as well as addresses and telephone numbers for State Data Center lead agencies." 相似文献