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   26694篇
  免费   1003篇
  国内免费   9篇
  2018年   378篇
  2017年   404篇
  2016年   428篇
  2015年   300篇
  2014年   371篇
  2013年   1969篇
  2012年   670篇
  2011年   707篇
  2010年   477篇
  2009年   438篇
  2008年   681篇
  2007年   621篇
  2006年   594篇
  2005年   511篇
  2004年   506篇
  2003年   512篇
  2002年   524篇
  2001年   676篇
  2000年   697篇
  1999年   534篇
  1998年   293篇
  1997年   298篇
  1996年   292篇
  1995年   269篇
  1992年   511篇
  1991年   491篇
  1990年   468篇
  1989年   444篇
  1988年   450篇
  1987年   424篇
  1986年   462篇
  1985年   453篇
  1984年   390篇
  1983年   348篇
  1982年   269篇
  1981年   293篇
  1979年   424篇
  1978年   347篇
  1977年   297篇
  1976年   303篇
  1975年   365篇
  1974年   455篇
  1973年   483篇
  1972年   358篇
  1971年   385篇
  1970年   342篇
  1969年   374篇
  1968年   445篇
  1967年   406篇
  1966年   424篇
排序方式: 共有10000条查询结果,搜索用时 31 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