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   24855篇
  免费   331篇
  国内免费   130篇
教育   16402篇
科学研究   3297篇
各国文化   200篇
体育   2820篇
综合类   28篇
文化理论   184篇
信息传播   2385篇
  2021年   199篇
  2020年   355篇
  2019年   490篇
  2018年   706篇
  2017年   651篇
  2016年   642篇
  2015年   429篇
  2014年   548篇
  2013年   4088篇
  2012年   496篇
  2011年   550篇
  2010年   421篇
  2009年   453篇
  2008年   439篇
  2007年   452篇
  2006年   447篇
  2005年   430篇
  2004年   615篇
  2003年   550篇
  2002年   535篇
  2001年   641篇
  2000年   478篇
  1999年   422篇
  1998年   252篇
  1997年   240篇
  1996年   274篇
  1995年   265篇
  1994年   224篇
  1993年   215篇
  1992年   350篇
  1991年   321篇
  1990年   341篇
  1989年   382篇
  1988年   305篇
  1987年   341篇
  1986年   320篇
  1985年   372篇
  1984年   325篇
  1983年   319篇
  1982年   260篇
  1981年   240篇
  1980年   239篇
  1979年   364篇
  1978年   264篇
  1977年   246篇
  1976年   231篇
  1975年   192篇
  1974年   211篇
  1973年   190篇
  1971年   167篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
931.
932.
933.
Abstract

If formal educators are to play a role in preparing future citizens for making decisions about health and environmental risks, then they must be willing and able to incorporate risk education. This article presents 10 goals for risk education. It also describes current risk education practices, future interests, and perceived barriers to risk education of Michigan, Ohio, and Wisconsin Grades 6–12 science teachers. Data were collected through a mail questionnaire (1,336 surveys were returned, adjusted return rate = 80%) and in-depth telephone interviews (completed with 45 teachers, return rate = 90%). Many teachers had covered some aspect of risk education and were interested in enhancing their efforts. Results also suggest that teachers need to be made aware of risk education resources and provided with training, particularly regarding psychological influences on risk decisions.  相似文献   
934.
935.
The author has compared groups of educationally sub‐normal adolescents in special schools with others in special classes in ordinary schools, with regard to their choices of jobs and actual later employment. Among other related findings, it transpired that many ESN pupils made realistic choices of occupation as well as did the normal pupils, and were more stable in their jobs than the normal pupils.  相似文献   
936.
This paper evaluates the impact of teaching innovations, introduced in public primary schools under the Children Resources International (CRI) Program, on student outcomes. We estimate students’ learning based on their scores on standardized tests. We match schools and children within the treatment and comparison group and find that the CRI Program has been effective in raising learning achievement. Moreover, the results are robust to unobserved selection bias. The average gain for a CRI student represents an improvement of 0.40 standard deviations. The results stay unchanged when we use alternative estimators for the treatment effect including the bias-corrected estimator proposed by Abadie and Imbens (2006).  相似文献   
937.
938.
We present the process our institution used to create a statistics requirement for almost all incoming first‐year students. From conception and planning, to hiring and acceptance by the university community, we offer lessons learned should you consider making such a shift in your own curriculum.  相似文献   
939.
In this article we first try to answer the question posed in the title in the context of a real life situation. We suggest sequential methods of selecting a member from a given set of individuals. We show that these methods indeed assign ‘equal chance’ of being selected to all individuals.  相似文献   
940.
Children living in poverty are 1.3 times as likely as non‐poor children to experience reading difficulties and lack key oral experiences that contribute to early literacy development. The purpose of this research was to study the effects of viewing commercially available educational television with closed captions. Seventy second‐ and third‐grade economically disadvantaged children living in urban locations participated in this experimental research design. Children were randomly assigned to view videos with or without closed captions. Captions helped children recognise and read more words, identify the meaning of those words, generate inferences regarding programme content and transfer these skills to a normative code‐related skill task. Risk status moderated word recognition performance: those at risk benefited from captions while those who were not at risk recognised more words when captions were absent.  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