全文获取类型
收费全文 | 21168篇 |
免费 | 295篇 |
国内免费 | 129篇 |
专业分类
教育 | 14838篇 |
科学研究 | 2388篇 |
各国文化 | 159篇 |
体育 | 1859篇 |
综合类 | 14篇 |
文化理论 | 184篇 |
信息传播 | 2150篇 |
出版年
2021年 | 160篇 |
2020年 | 291篇 |
2019年 | 475篇 |
2018年 | 621篇 |
2017年 | 581篇 |
2016年 | 572篇 |
2015年 | 369篇 |
2014年 | 469篇 |
2013年 | 3815篇 |
2012年 | 451篇 |
2011年 | 492篇 |
2010年 | 402篇 |
2009年 | 395篇 |
2008年 | 425篇 |
2007年 | 441篇 |
2006年 | 407篇 |
2005年 | 379篇 |
2004年 | 378篇 |
2003年 | 352篇 |
2002年 | 349篇 |
2001年 | 335篇 |
2000年 | 404篇 |
1999年 | 363篇 |
1998年 | 227篇 |
1997年 | 229篇 |
1996年 | 263篇 |
1995年 | 231篇 |
1994年 | 216篇 |
1993年 | 215篇 |
1992年 | 278篇 |
1991年 | 296篇 |
1990年 | 290篇 |
1989年 | 317篇 |
1988年 | 258篇 |
1987年 | 278篇 |
1986年 | 273篇 |
1985年 | 305篇 |
1984年 | 280篇 |
1983年 | 257篇 |
1982年 | 209篇 |
1981年 | 213篇 |
1980年 | 194篇 |
1979年 | 277篇 |
1978年 | 225篇 |
1977年 | 222篇 |
1976年 | 175篇 |
1975年 | 155篇 |
1974年 | 179篇 |
1973年 | 145篇 |
1971年 | 138篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
83.
84.
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
85.
Karyn Ogata Jones Bryan E. Denham Jeffrey K. Springston 《Journal of Applied Communication Research》2006,34(1):94-113
Drawing on components of agenda-setting theory and the two-step flow of information from mass media to news audiences, this study examines the effects of mass and interpersonal communication on breast cancer screening practices among college- and middle-aged women (n = 284). We theorized that screening behaviors among younger women would be influenced more by interpersonal sources of information while screening among middle-aged women would be more influenced by exposure to mass-mediated information. Findings supported anticipated patterns, revealing important and varying roles for both mass and interpersonal communication in the health behaviors of women. Implications for health practitioners and campaign planners, as well as recommendations for future research, are discussed. 相似文献
86.
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
87.
88.
89.
The Dynamics of Opinion Formation in Local Popular Referendums: Why the Dutch Always Say No 总被引:1,自引:0,他引:1
There is growing research on voting behavior in referendums.However, the dynamics of opinion formation in popular referendums,referendums initiated by the electorate to approve or rejectdecisions made by representative bodies, has not yet been studied.This is especially unfortunate as voting decisions in popularreferendums differ from those in other referendums in interestingways. Opinion formation can be a very dynamic process in popularreferendums, making the referendum campaign crucial. This paperstudies the dynamics of opinion formation in popular referendumsand relates them to particular characteristics of the campaignsand the issues at hand. Based on the literature, we consideredthe effects of the intensity of the yes and no campaigns, familiaritywith the issue, and partisan cues. Our study uses content analysisdata and data from public opinion surveys dealing with variouspopular referendums held in the Netherlands. The study revealedseveral factors that contributed to the volatility of opinionsin the referendum campaigns: the issue (new and did not fittraditional political schemes), lack of support from societaland community organizations for the position of the local authorities,and low profile campaigns on the part of local authorities.While some of these factors are general and may play a rolein referendums everywhere, some can be considered typicallyDutch, related to the characteristics of popular referendumsin the Netherlands and the countrys political system. 相似文献
90.
Creating Access to Invisible Special Collections: Using Participatory Management to Reduce a Backlog
The University of Colorado at Boulder Libraries used participatory management to reduce a special collections backlog. Without an increase in budget or staffing, technical and public services departments designed a pilot project to redeploy internal human resources in a collaborative manner. The process of backlog management is discussed. 相似文献