全文获取类型
收费全文 | 27866篇 |
免费 | 375篇 |
国内免费 | 126篇 |
专业分类
教育 | 19740篇 |
科学研究 | 3089篇 |
各国文化 | 189篇 |
体育 | 2249篇 |
综合类 | 17篇 |
文化理论 | 200篇 |
信息传播 | 2883篇 |
出版年
2021年 | 203篇 |
2020年 | 348篇 |
2019年 | 545篇 |
2018年 | 734篇 |
2017年 | 694篇 |
2016年 | 686篇 |
2015年 | 422篇 |
2014年 | 563篇 |
2013年 | 4991篇 |
2012年 | 561篇 |
2011年 | 656篇 |
2010年 | 446篇 |
2009年 | 443篇 |
2008年 | 544篇 |
2007年 | 489篇 |
2006年 | 550篇 |
2005年 | 446篇 |
2004年 | 420篇 |
2003年 | 401篇 |
2002年 | 429篇 |
2001年 | 535篇 |
2000年 | 508篇 |
1999年 | 502篇 |
1998年 | 259篇 |
1997年 | 294篇 |
1996年 | 342篇 |
1995年 | 329篇 |
1994年 | 256篇 |
1993年 | 288篇 |
1992年 | 422篇 |
1991年 | 408篇 |
1990年 | 411篇 |
1989年 | 455篇 |
1988年 | 422篇 |
1987年 | 392篇 |
1986年 | 379篇 |
1985年 | 433篇 |
1984年 | 383篇 |
1983年 | 411篇 |
1982年 | 330篇 |
1981年 | 311篇 |
1980年 | 296篇 |
1979年 | 441篇 |
1978年 | 347篇 |
1977年 | 320篇 |
1976年 | 285篇 |
1975年 | 245篇 |
1974年 | 258篇 |
1973年 | 237篇 |
1971年 | 208篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
111.
112.
113.
Maxfield DK 《Bulletin of the Medical Library Association》1975,63(3):345-346
114.
D D Hendricks 《Bulletin of the Medical Library Association》1976,64(2):203-211
The South Central Regional Medical Library Program, Region IX in the national network of medical libraries, was one of the last to be organized and funded. The particular makeup of this organization has permitted a good deal of flexibility in the identification and implementation of various types of network services and activities. The following is a brief account of some of these network functions during the first five years relating the successes and failures in network strategies and describing the further evolution of programs and refinement of a regional plan which will advance network services. 相似文献
115.
116.
117.
118.
This article first looks at the relationship between museums and art galleries and their potential audiences and, in particular, the under-represented sector of young visitors. It examines the main findings from the limited research available on young visitors, and goes on to discuss theories delineating the differences between the cultures, identities and values of culture consumers and culture providers. The second part of the article looks at what specific museums have done towards being more inclusive in their appeal, and then reports the findings of a survey of young people in relation to New Zealand's Auckland Art Gallery. The survey found that young people's ideas of what constitutes modern, relevant art do not match standard art criteria, and that most exhibitions and marketing methods do not mesh with their worldview. The article concludes by using data from the survey to suggest ways of engaging more young people with public art galleries. 相似文献
119.
Twelve Chinese academic journals, indexed by SCI and financed by the National Natural Science Foundation (NNSF), were analysed using the 2000–2003 Total Citations and Impact Factor data from JCR. It is concluded that the quality of Chinese journals is generally low and has remained so despite recent government measures aimed at improvement. Several factors are influential – particularly the Chinese government's policy of encouraging submission to foreign journals. Finance, management, and the academic degree policy are also obstacles. It is suggested that the Chinese government should reconsider its current policies so as to encourage higher quality in domestic periodicals and thus a greater recognition of Chinese journals by the international academic community. 相似文献
120.
Jennifer R. Warren Michael L. Hecht David A. Wagstaff Elvira Elek Khadidiatou Ndiaye Patricia Dustman Flavio F. Marsiglia 《Journal of Applied Communication Research》2006,34(2):209-227
This study sought to determine if exposure to two communication-oriented activities, videotapes and public service announcements, accounts for changes in substance use among adolescents participating in the Drug Resistance Strategies Project's keepin' it REAL adolescent substance use prevention curriculum. Middle-school students (4,734, 72% Latino) responded to questionnaires related to these analyses. An analysis of covariance (ANCOVA) model was fit separately to six substance use outcomes. The results suggested that intervention students who saw four or five videos engaged in less substance use in the past month than did students who saw fewer videos. Having seen the PSAs one or more times did not predict the reported change in substance use. 相似文献