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   24873篇
  免费   909篇
  国内免费   9篇
  2018年   330篇
  2017年   356篇
  2016年   373篇
  2015年   264篇
  2014年   338篇
  2013年   1773篇
  2012年   596篇
  2011年   640篇
  2010年   436篇
  2009年   391篇
  2008年   616篇
  2007年   560篇
  2006年   535篇
  2005年   460篇
  2004年   463篇
  2003年   471篇
  2002年   476篇
  2001年   641篇
  2000年   638篇
  1999年   508篇
  1998年   256篇
  1997年   275篇
  1996年   272篇
  1995年   257篇
  1992年   491篇
  1991年   454篇
  1990年   446篇
  1989年   421篇
  1988年   437篇
  1987年   409篇
  1986年   451篇
  1985年   433篇
  1984年   383篇
  1983年   336篇
  1981年   267篇
  1979年   406篇
  1978年   323篇
  1977年   283篇
  1976年   294篇
  1975年   339篇
  1974年   428篇
  1973年   465篇
  1972年   346篇
  1971年   366篇
  1970年   336篇
  1969年   361篇
  1968年   434篇
  1967年   401篇
  1966年   417篇
  1958年   253篇
排序方式: 共有10000条查询结果,搜索用时 15 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