全文获取类型
收费全文 | 23449篇 |
免费 | 306篇 |
国内免费 | 125篇 |
专业分类
教育 | 16513篇 |
科学研究 | 2725篇 |
各国文化 | 251篇 |
体育 | 1827篇 |
综合类 | 16篇 |
文化理论 | 219篇 |
信息传播 | 2329篇 |
出版年
2021年 | 149篇 |
2020年 | 285篇 |
2019年 | 449篇 |
2018年 | 615篇 |
2017年 | 595篇 |
2016年 | 589篇 |
2015年 | 403篇 |
2014年 | 510篇 |
2013年 | 4532篇 |
2012年 | 459篇 |
2011年 | 498篇 |
2010年 | 408篇 |
2009年 | 391篇 |
2008年 | 437篇 |
2007年 | 475篇 |
2006年 | 449篇 |
2005年 | 452篇 |
2004年 | 420篇 |
2003年 | 394篇 |
2002年 | 372篇 |
2001年 | 365篇 |
2000年 | 386篇 |
1999年 | 397篇 |
1998年 | 250篇 |
1997年 | 257篇 |
1996年 | 292篇 |
1995年 | 307篇 |
1994年 | 244篇 |
1993年 | 235篇 |
1992年 | 322篇 |
1991年 | 316篇 |
1990年 | 326篇 |
1989年 | 354篇 |
1988年 | 300篇 |
1987年 | 316篇 |
1986年 | 294篇 |
1985年 | 340篇 |
1984年 | 307篇 |
1983年 | 296篇 |
1982年 | 277篇 |
1981年 | 243篇 |
1980年 | 214篇 |
1979年 | 311篇 |
1978年 | 254篇 |
1977年 | 259篇 |
1976年 | 209篇 |
1975年 | 182篇 |
1974年 | 199篇 |
1973年 | 190篇 |
1971年 | 158篇 |
排序方式: 共有10000条查询结果,搜索用时 796 毫秒
101.
102.
103.
104.
105.
106.
John Zanni 《信息系统工程》2006,(9):29-29
2003至2004年,全球在SaaS(软件即服务)上的支出增长了39%,Netcraft预测,未来12个月内的活动站点增长率将达到28%,Web服务增长率将达到19%;IDC预测,2009年,全球在SaaS上的支出将达到107亿美元;Gartner预测,到2009年,美国托管收入将增长13%——这些都表明,SaaS的应用前景确实美好. 相似文献
107.
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
108.
109.
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
110.
Mary M. Meares John G. Oetzel Annette Torres Denise Derkacs Tamar Ginossar 《Journal of Applied Communication Research》2004,32(1):4-27
This study examines mistreatment through the perspectives of employees with different cultural backgrounds and positions in order to understand the ways in which some voices are muted and others are privileged. Mistreatment is interactional, distributive, procedural, or systemic abuse of employees taking place at both interpersonal and institutional levels on the basis of cultural diversity. Narrative analysis of semi-structured interviews with employees of a large research and development organization revealed three types of muted narratives used to respond to mistreatment (muted-but-engaged, angrily disengaged, and resigned) as well as one type of privileged response. The narratives provided evidence of two processes by which voices became muted: repeated silencing over time and silencing through ambiguity of policies. 相似文献