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   25415篇
  免费   934篇
  国内免费   9篇
  2018年   349篇
  2017年   370篇
  2016年   386篇
  2015年   275篇
  2014年   355篇
  2013年   1849篇
  2012年   611篇
  2011年   656篇
  2010年   454篇
  2009年   416篇
  2008年   645篇
  2007年   568篇
  2006年   551篇
  2005年   469篇
  2004年   481篇
  2003年   483篇
  2002年   486篇
  2001年   646篇
  2000年   653篇
  1999年   512篇
  1998年   266篇
  1997年   280篇
  1996年   285篇
  1995年   262篇
  1992年   497篇
  1991年   460篇
  1990年   451篇
  1989年   428篇
  1988年   441篇
  1987年   413篇
  1986年   452篇
  1985年   440篇
  1984年   378篇
  1983年   343篇
  1982年   261篇
  1981年   271篇
  1979年   402篇
  1978年   331篇
  1977年   289篇
  1976年   306篇
  1975年   343篇
  1974年   434篇
  1973年   467篇
  1972年   358篇
  1971年   370篇
  1970年   339篇
  1969年   366篇
  1968年   439篇
  1967年   401篇
  1966年   420篇
排序方式: 共有10000条查询结果,搜索用时 234 毫秒
11.
12.
We investigated motivational and cognitive processes of behavior change with respect to mammography screening. One hundred forty-two women (ages 40 and older) recruited from three worksites answered a 41-item questionnaire consisting of statements based on constructs from the transtheoretical model of behavior change. Principal-components analysis identified two factors: a six-item component representing positive perceptions of mammography (Pros) and a six-item component representing avoidance of mammography (Cons). Analysis of variance showed that Pros, Cons, and a derived Decisional Balance measure (Pros minus Cons) were associated with stage of mammography adoption. Results are consistent with applications of the model to smoking cessation. The model is also discussed as it relates to other theories of behavior change and as a general strategy for analyzing perceptual data pertinent to health-related actions and intentions for behavioral change.  相似文献   
13.
14.
15.
We investigated eye‐movements during preschool children's pictorial recall of seen objects. Thirteen 3‐ to 4‐year‐old children completed a perceptual encoding and a pictorial recall task. First, they were exposed to 16 pictorial objects, which were positioned in one of four distinct areas on the computer screen. Subsequently, they had to recall these pictorial objects from memory in order to respond to specific questions about visual details. We found that children spent more time fixating the areas in which the pictorial objects were previously displayed. We conclude that as early as age 3–4 years old, children show specific eye‐movements when they recall pictorial contents of previously seen objects.  相似文献   
16.
17.
18.
Two studies tested the hypothesis that certain positive emotions speed recovery from the cardiovascular sequelae of negative emotions. In Study 1, 60 subjects (Ss) viewed an initial fear-eliciting film, and were randomly assigned to view a secondary film that elicited: (a) contentment; (b) amusement; (c) neutrality; or (d) sadness. Compared to Ss who viewed the neutral and sad secondary films, those who viewed the positive films exhibited more rapid returns to pre-film levels of cardiovascular activation. In Study 2, 72 Ss viewed a film known to elicit sadness. Fifty Ss spontaneously smiled at least once while viewing this film. Compared to Ss who did not smile, those who smiled exhibited more rapid returns to pre-film levels of cardiovascular activation. We discuss these findings in terms of emotion theory and possible health-promoting functions of positive emotions.  相似文献   
19.
20.
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