全文获取类型
收费全文 | 17772篇 |
免费 | 210篇 |
国内免费 | 28篇 |
专业分类
教育 | 12119篇 |
科学研究 | 2096篇 |
各国文化 | 145篇 |
体育 | 1591篇 |
综合类 | 9篇 |
文化理论 | 153篇 |
信息传播 | 1897篇 |
出版年
2021年 | 172篇 |
2020年 | 256篇 |
2019年 | 356篇 |
2018年 | 545篇 |
2017年 | 523篇 |
2016年 | 483篇 |
2015年 | 321篇 |
2014年 | 478篇 |
2013年 | 3080篇 |
2012年 | 406篇 |
2011年 | 430篇 |
2010年 | 372篇 |
2009年 | 335篇 |
2008年 | 392篇 |
2007年 | 373篇 |
2006年 | 329篇 |
2005年 | 304篇 |
2004年 | 313篇 |
2003年 | 293篇 |
2002年 | 266篇 |
2001年 | 344篇 |
2000年 | 343篇 |
1999年 | 315篇 |
1998年 | 171篇 |
1997年 | 199篇 |
1996年 | 214篇 |
1995年 | 157篇 |
1994年 | 191篇 |
1993年 | 153篇 |
1992年 | 306篇 |
1991年 | 267篇 |
1990年 | 253篇 |
1989年 | 274篇 |
1988年 | 237篇 |
1987年 | 211篇 |
1986年 | 239篇 |
1985年 | 242篇 |
1984年 | 188篇 |
1983年 | 217篇 |
1982年 | 174篇 |
1981年 | 176篇 |
1980年 | 157篇 |
1979年 | 264篇 |
1978年 | 183篇 |
1977年 | 171篇 |
1976年 | 167篇 |
1975年 | 130篇 |
1974年 | 148篇 |
1973年 | 119篇 |
1971年 | 113篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
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
42.
The Alfred Taubman Medical Library at the University of Michigan has offered instruction in online literature searching to third-year pharmacy students as a component of the course "Drug Information and Scientific Literature Evaluation" since 1983. In the spring of 1989, a follow-up study was conducted to assess the impact of instruction on four classes of graduates. Of a pool of 151 graduates, 90 (60%) responded to a mailed questionnaire on their use of information and computerized literature searching. The respondents were divided into four subgroups: end-user searchers, users of intermediaries, end users who used intermediaries, and those who did not use computerized literature search systems. Seventy-two percent of the respondents used some type of computerized literature searching, and 42% performed their own searches. The four subgroups differed in general computer use, familiarity with MEDLINE search terminology, information use, reasons for using or not using literature searching, and characteristics of searches (i.e., type, time frame, amount, and frequency). Training in end-user search systems appears to have had an impact on the continued use of computerized literature searching several years after the formal educational program. 相似文献
43.
44.
45.
46.
47.
48.
"Change" is a critical dimension of contemporary experience. Library associations are not exempt, and they change in ways similar to other organizations. According to some authorities, four phases typify the process: diagnosis, design, implementation, and incorporation. Focusing on changes in the Medical Library Association's longstanding program of continuing education, the authors utilize the "phase framework" to chart that association's movement from a management system depending primarily upon volunteers to one in which professional staff figure prominently. The historical review serves a heuristic purpose for individuals and institutions in identifying characteristic features of the change process. 相似文献
49.
50.
K Olschner 《Bulletin of the Medical Library Association》1972,60(1):1-13
This study, an historical survey of medical journals in Louisiana before the outbreak of the Civil War in 1861, revealed that nine journals made an appearance during the period covered-all of them published in New Orleans. Of these, two were French language journals published by a French medical society. The others were all published by individuals rather than by professional societies. Medical practices, interests, and problems of the times were clearly reflected on the pages of the journals. It is evident that medical journalism reached a high plane in the era before the Civil War. Of the nine periodicals, only one emerged as a permanent publication after the War. 相似文献