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   13075篇
  免费   136篇
  国内免费   11篇
教育   8699篇
科学研究   2168篇
各国文化   101篇
体育   883篇
综合类   6篇
文化理论   81篇
信息传播   1284篇
  2021年   115篇
  2020年   171篇
  2019年   261篇
  2018年   330篇
  2017年   312篇
  2016年   274篇
  2015年   184篇
  2014年   249篇
  2013年   2367篇
  2012年   269篇
  2011年   259篇
  2010年   219篇
  2009年   210篇
  2008年   219篇
  2007年   228篇
  2006年   187篇
  2005年   185篇
  2004年   173篇
  2003年   163篇
  2002年   153篇
  2001年   202篇
  2000年   214篇
  1999年   183篇
  1998年   96篇
  1997年   117篇
  1996年   140篇
  1995年   108篇
  1994年   118篇
  1993年   128篇
  1992年   157篇
  1991年   172篇
  1990年   169篇
  1989年   184篇
  1988年   149篇
  1987年   145篇
  1986年   175篇
  1985年   176篇
  1984年   149篇
  1983年   149篇
  1982年   133篇
  1981年   113篇
  1980年   121篇
  1979年   150篇
  1978年   129篇
  1977年   124篇
  1976年   115篇
  1974年   117篇
  1973年   97篇
  1972年   94篇
  1971年   114篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
21.
22.
The purpose of this study was to describe the development of elementary students' skill in making predictions and of their understanding of what predicting means. The study involved observing and assessing the performance of 167 children on the Physical Manipulation Test (PMT), a test involving the manipulation of science materials and equipment. Children were interviewed about what they understand predicting to mean, how they use it at school and at home, and why they think it is important. For each of the seven topics tested, even the youngest children were able to offer predictions. Accuracy varied with the topic, increasing between Grades 1 and 4 and leveling off after that. The increase in skill involved children's growing ability to attend to patterns discerned through their own observations. Four levels in the development of predicting skill, as it relates to particular topics, are described. Children's understanding of predicting showed steady improvement through Grade 6. Children's awareness of their use of predicting at school and at home, and their ability to explain the importance of predicting, also increased through Grades 1 to 6, with a spurt at Grade 4. Children understood predicting to be an internal process in which one uses knowledge to anticipate a future event; they regarded predicting as an important way of being intellectually involved with the world.  相似文献   
23.
24.
Richard H. Beyler 《Minerva》2006,44(3):251-266
In responding to incidents of internal ‘indiscipline’, the Kaiser Wilhelm Society many times asserted its authority, sometimes in cooperation with agencies of the Nazi regime. Following the Second World War, however, the KWS represented itself as having been intrinsically anti-Nazi. This essay describes the assumptions inherent in this view, and points to its wider implications for post-war German science.  相似文献   
25.
26.
Schneider  William H. 《Minerva》2003,41(2):155-166
From 1919 to 1951, Alan Gregg and his mentor, Richard Pearce, directed the Medical Education and Medical SciencesDivisions of the Rockefeller Foundation. Although they oversaw the expenditure of millions of dollars, today they are forgotten. Yet, the system that Gregg administered became the model for the funding of biomedical research after the Second World War. This paper draws on the records of the Rockefeller Foundation to assess Gregg and his impact on biomedicine and philanthropy.  相似文献   
27.
28.
29.
30.
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