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   22925篇
  免费   284篇
  国内免费   30篇
教育   15766篇
科学研究   2742篇
各国文化   242篇
体育   1769篇
综合类   10篇
文化理论   189篇
信息传播   2521篇
  2021年   188篇
  2020年   290篇
  2019年   406篇
  2018年   524篇
  2017年   543篇
  2016年   534篇
  2015年   348篇
  2014年   491篇
  2013年   4230篇
  2012年   450篇
  2011年   467篇
  2010年   410篇
  2009年   364篇
  2008年   442篇
  2007年   406篇
  2006年   394篇
  2005年   344篇
  2004年   344篇
  2003年   314篇
  2002年   280篇
  2001年   560篇
  2000年   422篇
  1999年   361篇
  1998年   200篇
  1997年   229篇
  1996年   221篇
  1995年   196篇
  1994年   240篇
  1993年   213篇
  1992年   310篇
  1991年   327篇
  1990年   332篇
  1989年   340篇
  1988年   284篇
  1987年   283篇
  1986年   305篇
  1985年   352篇
  1984年   303篇
  1983年   293篇
  1982年   244篇
  1981年   241篇
  1980年   213篇
  1979年   301篇
  1978年   271篇
  1977年   219篇
  1976年   188篇
  1975年   204篇
  1974年   180篇
  1973年   195篇
  1971年   171篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
The impact of an inservice program on practitioners’ gerontological knowledge and attitudes was examined. A nonequivalent control group design was used to conduct the study. The experimental group was made up of geriatric recreational service providers attending the first of two annual one‐week inservice educational programs. An outdoor resource management undergraduate level class served as the control group. The experimental group relative to the control group underwent a significant increase in their gerontological knowledge. Neither group experienced a significant change in their attitudes regarding the social value of the elderly or personal anxiety toward aging. The amount of change experienced in gerontological knowledge by program participants was significantly influenced by the degree of contact the individual had had with elders but not by their educational background. Educational background and degree of contact were not significantly associated with change in gerontological‐related attitudes. Implications for persons involved in designing and developing educational programs are discussed.  相似文献   
993.
994.
995.
996.
This article describes “SPREAD”, a simulation toolkit, and its use in building “Virtual Robots”, a simulation of multiple mobile robot vehicles used in the teaching of computer science at university level. A novel aspect of the simulator is the use of PVM (Parallel Virtual Machine) to achieve high performance at low cost by using spare CPU cycles on large numbers of networked workstations.  相似文献   
997.
Software analysis, testing, and verification (ATV) is a major activity in the real world of software development, yet it remains underemphasized in the undergraduate computer science curriculum at most colleges and universities. This paper discusses the importance of software ATV and its relationship to other subject areas in computer science. Concepts, terminology, and techniques from software ATV are presented, and examples are given to show how they may be integrated into the undergraduate computer science curriculum.  相似文献   
998.
The paper provides (1) a teacher-administered rating instrument for inattention without confounding the rating with hyperactivity and conduct disorder, and (2) evidence that the ratings correlate with the scores obtained from cognitive tests of attention. In Study I, the first objective was to investigate the construct validity and the inter-rater reliability of the Attention Checklist (ACL) by factor analysing the teacher ratings of 110 Grade 4 children, obtained by using the ACL. The second objective was to investigate the predictive validity of the ACL by examining the relationship between the scores obtained for the participants from teachers' ratings using the ACL and the scores obtained by participants in the lab-type attention tests. The results of factor analysis showed that a single factor labelled ‘inattention’ underlies the 12 items in the ACL. Examining the differences in performance on attention tests, the ‘low attention’ children as rated by the teachers on the ACL scored lower than the ‘high attention’ children on the objective tests of attention. These findings were replicated in Study II, which was conducted to test further the construct validity and predictive validity of the ACL. This time, only those two tests (Auditory Attention and Visual Attention) that had shown relatively poor discrimination between the high and low attention groups in Study I were, again, administered to another cohort of 97 Grade 4 children, as it was our intention to further challenge the reliability of the ACL. Overall, the results of both studies suggest that comprehensive assessment of attention skills should include both ACL and objective measures of selective attention.  相似文献   
999.
1000.
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