首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   50657篇
  免费   769篇
  国内免费   502篇
教育   34849篇
科学研究   6244篇
各国文化   242篇
体育   3498篇
综合类   1112篇
文化理论   642篇
信息传播   5341篇
  2022年   386篇
  2021年   790篇
  2020年   765篇
  2019年   732篇
  2018年   2924篇
  2017年   2948篇
  2016年   2385篇
  2015年   1174篇
  2014年   1573篇
  2013年   5417篇
  2012年   2117篇
  2011年   2737篇
  2010年   2574篇
  2009年   2087篇
  2008年   2274篇
  2007年   2831篇
  2006年   1721篇
  2005年   1788篇
  2004年   1353篇
  2003年   1253篇
  2002年   1110篇
  2001年   965篇
  2000年   772篇
  1999年   632篇
  1998年   366篇
  1997年   348篇
  1996年   349篇
  1995年   250篇
  1994年   244篇
  1993年   239篇
  1992年   340篇
  1991年   327篇
  1990年   348篇
  1989年   326篇
  1988年   297篇
  1987年   252篇
  1986年   260篇
  1985年   327篇
  1984年   269篇
  1983年   263篇
  1982年   197篇
  1981年   208篇
  1980年   178篇
  1979年   242篇
  1978年   214篇
  1977年   194篇
  1976年   162篇
  1975年   129篇
  1974年   120篇
  1973年   149篇
排序方式: 共有10000条查询结果,搜索用时 109 毫秒
991.
Forty-five abusive parents (40 mothers, 5 fathers) in treatment at a large, urban medical center's child abuse program were compared on 22 parent, child, and treatment variables posited to bear on reabuse. While no one variable by itself was strongly associated with reabuse, the data indicated that interactions involving several variables (e.g., income source, marital status, and the abuser's personal abuse history) significantly differentiated between reabusers and nonreabusers. Implications of the findings for research and clinical intervention are discussed.  相似文献   
992.
993.
994.
995.
Spelling skills have been identified as one of the major barriers to written text production in young English writers. By contrast oral language skills and text generation have been found to be less influential in the texts produced by beginning writers. To date, our understanding of the role of spelling skills in transparent orthographies is limited. The current study addressed this gap by examining the contribution of spelling, oral language and text generation skills in written text production in Italian beginner writers. Eighty-three children aged 7–8 years participated in the study. Spelling, lexical retrieval, receptive grammar, and written sentence generation and reformulation skills were assessed and children were asked to write a text on a set topic. A factor analysis revealed that the children’s written text production was captured by three factors: productivity, complexity and accuracy. In contrast to results from children learning to write in opaque orthographies, such as English, this study showed that receptive grammar and written sentence generation skills accounted for significant variance in measures of productivity, complexity and accuracy in Italian children’s written text production. Spelling skills contributed to text accuracy and quality and explained more variance than receptive grammar in microstructural accuracy. By contrast, oral grammatical skills explained more variance in text quality than spelling. The current study shows the differential impact of language systems, such as Italian, on written text production. Implications for assessment and instruction are outlined.  相似文献   
996.
建设和谐社会需要会计工作的重心从财务会计转向管理会计,发挥反映、监督和参与决策职能的作用。结合会计工作的基本特征,分析如何在建设和谐社会的进程中改进和提高会计工作的质量。  相似文献   
997.
998.
Institutional administrators, faculty, state planners, and legislatures have little analytical basis available to help them cope with the expected excess higher education capacity of the 1980s. Without objective criteria, state planners and legislatures are likely to propose across-the-board reductions even if it were preferable to close some institutions and expand others. This study is a case application of an optimization model to two community colleges in northern Minnesota. Using estimated enrollment demand functions and readily available data on size, quality, and costs, this model is designed to assist policymakers in identifying overbuilt institutions and programs that should be closed. The state's objective in the model is to satisfy specified proportions of enrollment demand with a minimum expenditure of state funds.  相似文献   
999.
1000.
The phrase “social movement” typically conjures up images of pickets, massive crowds, and noisy demonstrations. An emerging approach to campus‐based change, used in Fraternal Futures and other projects, is tapping into the small, the local, and the personally relevant.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号