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   15068篇
  免费   199篇
  国内免费   22篇
教育   10498篇
科学研究   1600篇
各国文化   147篇
体育   1361篇
综合类   7篇
文化理论   119篇
信息传播   1557篇
  2021年   149篇
  2020年   225篇
  2019年   321篇
  2018年   421篇
  2017年   399篇
  2016年   412篇
  2015年   281篇
  2014年   355篇
  2013年   2734篇
  2012年   326篇
  2011年   362篇
  2010年   315篇
  2009年   248篇
  2008年   304篇
  2007年   291篇
  2006年   262篇
  2005年   225篇
  2004年   250篇
  2003年   225篇
  2002年   205篇
  2001年   466篇
  2000年   323篇
  1999年   278篇
  1998年   136篇
  1997年   166篇
  1996年   154篇
  1995年   134篇
  1994年   162篇
  1993年   137篇
  1992年   195篇
  1991年   207篇
  1990年   208篇
  1989年   209篇
  1988年   182篇
  1987年   168篇
  1986年   186篇
  1985年   223篇
  1984年   175篇
  1983年   172篇
  1982年   146篇
  1981年   141篇
  1980年   123篇
  1979年   177篇
  1978年   143篇
  1977年   128篇
  1976年   97篇
  1975年   124篇
  1974年   104篇
  1973年   118篇
  1971年   105篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
131.
132.
133.
134.
135.
This study was designed to obtain the perceptions of regular class teachers who taught children who had been in EMR programs, but had been decertified (D) and returned to regular classes in response to court cases and recent legislation. A cohort of regular class (RC) students were selected for comparative purposes. It was found that D students were placed into low ability classes; yet, teachers perceived D subjects to be significantly lower than RC students in both academic achievement and social acceptance. Only a small proportion of teachers indicated that the enrollment of D students had much impact on the regular class instructional program. However, the teachers were rather critical of the services received under the auspices of a transitional program, indicating in large part that the services were either not apparent or ineffective.  相似文献   
136.
The WISC-R scores for groups of children identified by school personnel as needing special education services were factor analyzed according to type of classification. WISC-R factor loadings were obtained for the scores of children labeled Learning Disabled, Educable Mentally Impaired, and Emotionally Impaired, as well as groups labeled Other and None. Overall, results show the WISC-R to be factorially similar for all groups, with two principal factors emerging which correspond to the Verbal-Performance structure of the test. Significance tests among mean scale scores and IQ scores yielded few meaningful differences across groups.  相似文献   
137.
The Odd Couple…” is a narrative presentation of the successful joint programming efforts of a public school system and community centers for mental health in providing comprehensive educational services to emotionally disturbed students. Problems and resolutions in regard to control, coordination, and philosophy issues are discussed. This article describes a simple yet effective model for cost effective and successful joint programs between non-administratively related agencies.  相似文献   
138.
139.
Biodiversity science in China has seen rapid growth over recent decades, ranging from baseline biodiversity studies to understanding the processes behind evolution across dynamic regions such as the Qinghai-Tibetan Plateau. We review research, including species catalogues; biodiversity monitoring; the origins, distributions, maintenance and threats to biodiversity; biodiversity-related ecosystem function and services; and species and ecosystems’ responses to global change. Next, we identify priority topics and offer suggestions and priorities for future biodiversity research in China. These priorities include (i) the ecology and biogeography of the Qinghai-Tibetan Plateau and surrounding mountains, and that of subtropical and tropical forests across China; (ii) marine and inland aquatic biodiversity; and (iii) effective conservation and management to identify and maintain synergies between biodiversity and socio-economic development to fulfil China''s vision for becoming an ecological civilization. In addition, we propose three future strategies: (i) translate advanced biodiversity science into practice for biodiversity conservation; (ii) strengthen capacity building and application of advanced technologies, including high-throughput sequencing, genomics and remote sensing; and (iii) strengthen and expand international collaborations. Based on the recent rapid progress of biodiversity research, China is well positioned to become a global leader in biodiversity research in the near future.  相似文献   
140.
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