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   13933篇
  免费   231篇
  国内免费   12篇
教育   9685篇
科学研究   1692篇
各国文化   124篇
体育   1017篇
综合类   17篇
文化理论   165篇
信息传播   1476篇
  2022年   109篇
  2021年   148篇
  2020年   246篇
  2019年   323篇
  2018年   457篇
  2017年   484篇
  2016年   431篇
  2015年   280篇
  2014年   409篇
  2013年   2263篇
  2012年   342篇
  2011年   327篇
  2010年   316篇
  2009年   271篇
  2008年   301篇
  2007年   293篇
  2006年   276篇
  2005年   235篇
  2004年   261篇
  2003年   232篇
  2002年   238篇
  2001年   313篇
  2000年   334篇
  1999年   255篇
  1998年   139篇
  1997年   179篇
  1996年   176篇
  1995年   119篇
  1994年   130篇
  1993年   116篇
  1992年   197篇
  1991年   182篇
  1990年   214篇
  1989年   210篇
  1988年   180篇
  1987年   192篇
  1986年   172篇
  1985年   207篇
  1984年   150篇
  1983年   131篇
  1982年   124篇
  1981年   112篇
  1980年   114篇
  1979年   175篇
  1978年   132篇
  1977年   113篇
  1976年   91篇
  1975年   93篇
  1974年   95篇
  1973年   91篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
171.
172.
173.
174.
OBJECTIVE: This study had two aims: First to examine psychosocial correlates of child maltreatment risk, and second to assess the validity of the CAP Inventory (Milner, 1986) with multiply disadvantaged teenage mothers. METHOD: Participants were 75 adolescent mothers who were wards of the Illinois child protection system. Mothers (aged 14-18) and infants participated in home-based psychosocial assessment of personal and parenting functioning. Group comparisons examined differences for mothers with elevated versus normal versus invalid CAP scores due to faking good. RESULTS: Findings indicated that abuse risk groups differed on emotional distress, social support satisfaction, reading achievement, and years of education, but not on parenting beliefs or quality of child stimulation. Differences favored the normal over the elevated risk group in all significant comparisons, whereas mothers with elevated faking good differed from normals only in lower reading achievement. Multiple regression analysis highlighted emotional distress, support dissatisfaction, and low achievement as significant predictors of greater abuse risk. CONCLUSIONS: Despite sharing multiple disadvantages, adolescent wards are a heterogeneous group who show different levels of psychosocial functioning corresponding to levels of child maltreatment risk. The findings provide support for the concurrent validity and clinical applicability of the CAP Inventory with disadvantaged teenage mothers.  相似文献   
175.
176.
A cowse‐integrated programme of library instruction has been developed for the School of Civil Engineering at the Queensland University of Technology, Australia; library instruction being one of the means selected to improve the research efforts of fourth year project students. The programme has been developed through consultation between the Civil Engineering Research Project Coordinator and the Civil Engineering Reference Librarian. Its aims are derived from those established for the fourth year research projects. Attention is focussed on the nature of the programme and the impact of instruction on fourth year research project students. Students who had received extended library instruction were compared with students from the previous year. Evidence suggests that the instruction has improved the information seeking behaviour of the students and their literature reviews.  相似文献   
177.
Research in Higher Education - Given a revived national discourse about rural populations, more educational research on rural students is necessary, including ways that rural students transition to...  相似文献   
178.

Amicus Curiae

A brief for individual merit in Michigan Covington &; burling for the national association of scholars  相似文献   
179.
Research in Science Education - Students in upper secondary education encounter difficulties in applying mathematics in physics. To improve our understanding of these difficulties, we examined...  相似文献   
180.
In an effort to understand the role of interhemispheric transfer in numerical development, we investigated the relationship between children's developing knowledge of numbers and the integrity of their white matter connections between the cerebral hemispheres (the corpus callosum). We used diffusion tensor imaging (DTI) tractography analyses to test the link between the development of the corpus callosum and performance on symbolic and non-symbolic numerical judgment tasks. We were especially interested in the interhemispheric connections of parietal cortex in 6-year-old children, because regions of parietal cortex have been implicated in the development of numerical skills by several prior studies. Our results revealed significant structural differences between children and adults in the fibers of the corpus callosum connecting the left and right parietal lobes. Importantly, these structural differences were predictive of individual differences among children in performance on numerical judgment tasks: children with poor numerical performance relative to their peers exhibited reduced white matter coherence in the fibers passing through the isthmus of the corpus callosum, which connects the parietal hemispheres.  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