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   17482篇
  免费   208篇
  国内免费   22篇
教育   12213篇
科学研究   2079篇
各国文化   139篇
体育   1334篇
综合类   13篇
文化理论   167篇
信息传播   1767篇
  2021年   162篇
  2020年   228篇
  2019年   303篇
  2018年   497篇
  2017年   514篇
  2016年   586篇
  2015年   391篇
  2014年   417篇
  2013年   2625篇
  2012年   482篇
  2011年   513篇
  2010年   389篇
  2009年   279篇
  2008年   368篇
  2007年   321篇
  2006年   300篇
  2005年   914篇
  2004年   756篇
  2003年   537篇
  2002年   321篇
  2001年   521篇
  2000年   329篇
  1999年   290篇
  1998年   127篇
  1997年   172篇
  1996年   145篇
  1995年   132篇
  1994年   151篇
  1993年   116篇
  1992年   190篇
  1991年   197篇
  1990年   199篇
  1989年   205篇
  1988年   171篇
  1987年   167篇
  1986年   172篇
  1985年   208篇
  1984年   164篇
  1983年   155篇
  1982年   131篇
  1981年   125篇
  1980年   125篇
  1979年   169篇
  1978年   133篇
  1977年   124篇
  1976年   97篇
  1975年   114篇
  1974年   102篇
  1973年   108篇
  1971年   99篇
排序方式: 共有10000条查询结果,搜索用时 9 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.
When was the last time you experienced a perfect moment? You know,the kind of moment when everything is in sync and where a certain clarity surrounds the scene, setting it apart from the rest of the world.  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