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   14657篇
  免费   192篇
  国内免费   21篇
教育   10263篇
科学研究   1620篇
各国文化   133篇
体育   1265篇
综合类   6篇
文化理论   128篇
信息传播   1455篇
  2021年   145篇
  2020年   207篇
  2019年   300篇
  2018年   406篇
  2017年   402篇
  2016年   402篇
  2015年   261篇
  2014年   347篇
  2013年   2584篇
  2012年   323篇
  2011年   347篇
  2010年   302篇
  2009年   236篇
  2008年   303篇
  2007年   264篇
  2006年   248篇
  2005年   227篇
  2004年   257篇
  2003年   230篇
  2002年   201篇
  2001年   471篇
  2000年   320篇
  1999年   271篇
  1998年   132篇
  1997年   176篇
  1996年   150篇
  1995年   148篇
  1994年   160篇
  1993年   117篇
  1992年   193篇
  1991年   203篇
  1990年   203篇
  1989年   214篇
  1988年   171篇
  1987年   168篇
  1986年   181篇
  1985年   225篇
  1984年   171篇
  1983年   167篇
  1982年   145篇
  1981年   132篇
  1980年   123篇
  1979年   178篇
  1978年   139篇
  1977年   118篇
  1976年   96篇
  1975年   119篇
  1974年   103篇
  1973年   119篇
  1971年   102篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
141.
142.
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   
143.
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   
144.
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   
145.
146.
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   
147.
Although science has received much attention as a political and educational initiative, students with learning disabilities (LD) perform significantly lower than their nondisabled peers. This meta‐analysis evaluates the effectiveness of instructional strategies in science for students with LD. Twelve studies were examined, summarized, and grouped according to the type of strategy implemented. Effect sizes (ES) were calculated for each study. Across all studies, a mean ES of .78 was obtained, indicating a moderate positive effect on students with LD science achievement. Findings also align with past reviews of inquiry‐based instruction for students with special needs, indicating that students with LD need structure within an inquiry science approach in order to be successful. Additionally, results suggest that mnemonic instruction is highly effective at increasing learning disabled students' acquisition and retention of science facts.  相似文献   
148.
149.
ABSTRACT

The objective of this study was to analyse the effect of the use of social networks in smartphones or playing video games on the passing decision-making performance in professional soccer athletes. Participants were 25 male professional soccer athletes (mean ± SD: age 23.4 ± 2.8 years). The participants performed three randomised conditions divided into three groups: control (CON), smartphone (SMA), and video game (VID). Before and after each experimental condition, the Stroop Task assessed the level of induced mental fatigue. Then, the athletes performed a simulated soccer match. A CANON® camera recorded the matches for further analysis on passing decision-making performance. A group effect was identified (< .01) with impairment on passing decision-making performance for the SMA (p = .01, ES = 0.5) and VID (p = .01, ES = 0.5) conditions. We concluded that the use of social networks on smartphones and/or playing video games right before official soccer matches might impair the passing decision-making performance in professional soccer athletes.  相似文献   
150.
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