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   63697篇
  免费   2605篇
  国内免费   18篇
  2020年   636篇
  2019年   827篇
  2018年   1101篇
  2017年   1129篇
  2016年   1240篇
  2015年   903篇
  2014年   1023篇
  2013年   4821篇
  2012年   1925篇
  2011年   2142篇
  2010年   1318篇
  2009年   1343篇
  2008年   1871篇
  2007年   1909篇
  2006年   1719篇
  2005年   1531篇
  2004年   1448篇
  2003年   1375篇
  2002年   1459篇
  2001年   2053篇
  2000年   2023篇
  1999年   1547篇
  1998年   771篇
  1997年   675篇
  1996年   675篇
  1995年   599篇
  1993年   598篇
  1992年   1297篇
  1991年   1171篇
  1990年   1170篇
  1989年   1048篇
  1988年   1031篇
  1987年   996篇
  1986年   1068篇
  1985年   1078篇
  1984年   904篇
  1983年   838篇
  1982年   595篇
  1979年   967篇
  1978年   703篇
  1975年   770篇
  1974年   827篇
  1973年   917篇
  1972年   775篇
  1971年   729篇
  1970年   645篇
  1969年   669篇
  1968年   861篇
  1967年   778篇
  1966年   652篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
In five experiments, we examined 3‐ to 6‐year‐olds’ understanding that they could gain knowledge indirectly from someone who had seen something they had not. Consistent with previous research, children judged that an informant, who had seen inside a box, knew its contents. Similarly, when an informant marked a picture to indicate her suggestion as to the content of the box, 3‐ to 4‐year‐olds trusted this more frequently when the informant had seen inside the box than when she had not. Going beyond previous research, 3‐ to 4‐year‐olds were also sensitive to informants’ relevant experience when they had to look over a barrier to see the marked picture, or ask for the barrier to be raised. Yet when children had to elicit the informant's suggestion, rather than just consult a suggestion already present, even 4‐ to 5‐year‐olds were no more likely to do so when the informant had seen the box's content than when she had not, and no more likely to trust the well‐informed suggestion than the uninformed one. We conclude that young children who can ask questions may not yet fully understand the process by which they can gain accurate information from someone who has the experience they lack.  相似文献   
62.
This study examines the relationship of life stress, daily hassles, and perceived self-efficacy to adjustment in a community sample of 32 men and 32 women between ages 65 and 75. In a structured interview, negative life change events, daily hassles, self-efficacy, depression, psychosomatic symptoms, and negative well being were assessed. Both negative life events and daily hassles were related to psychological distress and physical symptoms for men, and hassles were associated with psychological distress and physical symptoms for women. An inverse relationship between self-efficacy and maladjustment was also found. Hassles showed the most powerful relationship to distress.  相似文献   
63.
Book reviews     
TOATES, F. Animal Behaviour: A Systems Approach. Chichester: John Wiley and Sons. 1980. Pp. 299. Hardback £17. Paper back £6.40 ISBN 0 471 27724.

DICKINSON, A. Contemporary Animal Learning Theory. Cambridge: University Press. 1980. Pp. 177. Hardback £12.50. Paperback £3.95. ISBN 0 521 23469 7.  相似文献   
64.
65.
66.
67.
Suicides among older adults in the United States and Canada in the last decade have accounted for an increasing share of all suicides. In both countries the use of firearms among older adults has steadily increased. Despite these trends, little is known about the extent to which crisis centers are prepared to prevent elder suicide. A survey of AAS-listed crisis prevention centers examined the training, knowledge, and current practices relevant to elder suicide among personnel in 321 crisis prevention centers in both countries. Results revealed insufficient training, a lack of familiarity with recent suicide trends, and limited outreach to older adults.  相似文献   
68.
69.
70.
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