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   15057篇
  免费   263篇
  国内免费   57篇
教育   10249篇
科学研究   2058篇
各国文化   127篇
体育   1102篇
综合类   107篇
文化理论   163篇
信息传播   1571篇
  2022年   120篇
  2021年   207篇
  2020年   236篇
  2019年   306篇
  2018年   430篇
  2017年   455篇
  2016年   409篇
  2015年   324篇
  2014年   470篇
  2013年   2312篇
  2012年   462篇
  2011年   441篇
  2010年   441篇
  2009年   386篇
  2008年   356篇
  2007年   400篇
  2006年   384篇
  2005年   332篇
  2004年   313篇
  2003年   270篇
  2002年   286篇
  2001年   365篇
  2000年   361篇
  1999年   273篇
  1998年   158篇
  1997年   195篇
  1996年   179篇
  1995年   120篇
  1994年   135篇
  1993年   123篇
  1992年   198篇
  1991年   182篇
  1990年   213篇
  1989年   210篇
  1988年   182篇
  1987年   193篇
  1986年   173篇
  1985年   207篇
  1984年   151篇
  1983年   131篇
  1982年   124篇
  1981年   109篇
  1980年   112篇
  1979年   174篇
  1978年   130篇
  1977年   113篇
  1976年   90篇
  1975年   92篇
  1974年   94篇
  1973年   91篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
181.
182.
183.
184.
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   
185.
186.
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   
187.
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   
188.

Amicus Curiae

A brief for individual merit in Michigan Covington &; burling for the national association of scholars  相似文献   
189.
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   
190.
This meta-analysis integrates 296 effect sizes reported in eye-tracking research on expertise differences in the comprehension of visualizations. Three theories were evaluated: Ericsson and Kintsch’s (Psychol Rev 102:211–245, 1995) theory of long-term working memory, Haider and Frensch’s (J Exp Psychol Learn Mem Cognit 25:172–190, 1999) information-reduction hypothesis, and the holistic model of image perception of Kundel et al. (Radiology 242:396–402, 2007). Eye movement and performance data were cumulated from 819 experts, 187 intermediates, and 893 novices. In support of the evaluated theories, experts, when compared with non-experts, had shorter fixation durations, more fixations on task-relevant areas, and fewer fixations on task-redundant areas; experts also had longer saccades and shorter times to first fixate relevant information, owing to superiority in parafoveal processing and selective attention allocation. Eye movements, reaction time, and performance accuracy were moderated by characteristics of visualization (dynamics, realism, dimensionality, modality, and text annotation), task (complexity, time-on-task, and task control), and domain (sports, medicine, transportation, other). These findings are discussed in terms of their implications for theories of visual expertise in professional domains and their significance for the design of learning environments.  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