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   1365篇
  免费   25篇
教育   1104篇
科学研究   57篇
各国文化   29篇
体育   50篇
文化理论   11篇
信息传播   139篇
  2023年   6篇
  2022年   5篇
  2021年   14篇
  2020年   27篇
  2019年   32篇
  2018年   29篇
  2017年   44篇
  2016年   39篇
  2015年   33篇
  2014年   32篇
  2013年   328篇
  2012年   34篇
  2011年   44篇
  2010年   38篇
  2009年   36篇
  2008年   37篇
  2007年   31篇
  2006年   32篇
  2005年   47篇
  2004年   34篇
  2003年   24篇
  2002年   42篇
  2001年   19篇
  2000年   33篇
  1999年   14篇
  1998年   11篇
  1997年   11篇
  1996年   25篇
  1995年   13篇
  1994年   22篇
  1993年   27篇
  1992年   16篇
  1991年   24篇
  1990年   14篇
  1989年   11篇
  1988年   15篇
  1987年   9篇
  1986年   13篇
  1985年   11篇
  1984年   8篇
  1983年   14篇
  1982年   6篇
  1981年   9篇
  1980年   19篇
  1979年   11篇
  1978年   11篇
  1977年   6篇
  1976年   6篇
  1975年   4篇
  1973年   5篇
排序方式: 共有1390条查询结果,搜索用时 15 毫秒
961.
This paper examines the current relation between pure and applied research on the comprehension of written information. It finds few points of contact. The suggestion is put forward that greater interaction could be mutually profitable. An information flow among researchers is proposed that starts with applied solutions to practical problems, continues through pure explanations of why these solutions are successful, and so enables the refinement of the original applied solutions. Because such an information flow begins with applied solutions, some of the problems of systematizing the findings of applied research are discussed. There can never be an applied theory of communication that specifies precisely how to design written information. Therefore a proposal is put forward for applying quality-control procedures to the preparation of documents. Such procedures indicate that several different kinds of research are necessary for determining the content, optimising the format and evaluating the effectiveness of written communications. The desirability of interactions among those who carry out these different kinds of research is discussed. Finally, the criteria for evaluating research in general are considered. The categorisation of particular studies as either useful or useless is found to be inappropriate.Thanks are due to Drs John Morton and John Marshall both for providing the incentive to put these thoughts in writing and for their advice and encouragement during the preparation of the paper. Many helpful comments on an earlier draft were received from Dr Arnold Wilkins, Dr James Hartley and Michael Macdonald-Ross. These were all much appreciated, even though some may appear not to have been implemented directly.  相似文献   
962.
963.
964.
965.
966.
967.
968.
969.
Adult male, and female rats that had suffered either postnatal undernutrition or postnatal zinc deficiency were more highly motivated for food than normal rats. A progressive ratio schedule was used to test the rats for food motivation. All rats were deprived of food 24 h prior to testing. Each rat was tested once a week for 8 consecutive weeks. The smaller body size of the previously malnourished rats relative to their body surface area seemed to be the best explanation for their higher level of motivation.  相似文献   
970.
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