全文获取类型
收费全文 | 24292篇 |
免费 | 343篇 |
国内免费 | 60篇 |
专业分类
教育 | 17872篇 |
科学研究 | 1638篇 |
各国文化 | 323篇 |
体育 | 1807篇 |
综合类 | 47篇 |
文化理论 | 202篇 |
信息传播 | 2806篇 |
出版年
2022年 | 146篇 |
2021年 | 245篇 |
2020年 | 371篇 |
2019年 | 543篇 |
2018年 | 766篇 |
2017年 | 802篇 |
2016年 | 758篇 |
2015年 | 527篇 |
2014年 | 669篇 |
2013年 | 4985篇 |
2012年 | 651篇 |
2011年 | 668篇 |
2010年 | 593篇 |
2009年 | 558篇 |
2008年 | 657篇 |
2007年 | 579篇 |
2006年 | 597篇 |
2005年 | 536篇 |
2004年 | 384篇 |
2003年 | 418篇 |
2002年 | 372篇 |
2001年 | 488篇 |
2000年 | 392篇 |
1999年 | 350篇 |
1998年 | 252篇 |
1997年 | 253篇 |
1996年 | 272篇 |
1995年 | 252篇 |
1994年 | 255篇 |
1993年 | 219篇 |
1992年 | 309篇 |
1991年 | 300篇 |
1990年 | 326篇 |
1989年 | 295篇 |
1988年 | 249篇 |
1987年 | 247篇 |
1986年 | 249篇 |
1985年 | 244篇 |
1984年 | 237篇 |
1983年 | 236篇 |
1982年 | 202篇 |
1981年 | 206篇 |
1980年 | 212篇 |
1979年 | 256篇 |
1978年 | 212篇 |
1977年 | 152篇 |
1976年 | 167篇 |
1975年 | 151篇 |
1974年 | 134篇 |
1971年 | 141篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
Brazin LR 《Medical reference services quarterly》1993,12(3):13-27
This is an update of an earlier article listing directories, journal articles, and general books that aid the librarian, resident, or medical student in finding information on residency and fellowship programs. The article also gives suggestions for building a file of program catalogs related to residencies, fellowships, and clerkships and related materials. 相似文献
52.
53.
54.
55.
56.
57.
58.
This paper describes the procedures used at the Library of the College of Physicians of Philadelphia to divide its ninety-year-old dictionary card catalog. The division was necessitated by overcrowding, obsolete subject headings, and lack of a complete authority list which resulted in like materials being scattered throughout the catalog under several headings. Two catalogs were created: the historical-biographical catalog, representing all works published before 1950 and all works of historical or biographical nature; and the current catalog, containing all works published from 1950 on, excepting historical or biographical materials. The 1950- catalog was further divided into name and subject catalogs, and the subject section was revised according to MeSH. The project was completed in about two years. As a result, searching time has been much reduced, and the library is able to take advantage of the annual revisions of MeSH to update the subject catalog. 相似文献
59.
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
60.
This study examined two levels of media agenda effects on aggregatepublic opinion from different news sources. The effects wereinvestigated immediately and cumulatively. Content analysisdata from the 2000 U.S. presidential election coverage by fournational news organizations were related to the Gallup pre-electionpoll standings of each candidate. Regression analyses foundthat both the salience of a candidate and the salience of theattributes of a candidate cumulatively, but not immediately,influenced his standing in the polls. An analysis of news sourcessupported the finding that the two levels of agenda-settingeffects seemed mostly cumulative rather than immediate. Newsfrom different sources, however, tended to have effects of differentdegrees and sometimes different directions on candidate pollstandings. Cumulative effects of candidate salience on aggregateopinion change were found for non-partisan and neutral newssourcesreporters, poll reporting and public documentswhereasthe effects of candidate attribute salience mostly came frompartisan sourcesthe candidate himself and members ofthe competing political party. Possible political implicationsof these findings are discussed. 相似文献