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   46378篇
  免费   2079篇
  国内免费   32篇
  2020年   546篇
  2019年   647篇
  2018年   941篇
  2017年   893篇
  2016年   993篇
  2015年   700篇
  2014年   815篇
  2013年   3651篇
  2012年   1522篇
  2011年   1597篇
  2010年   929篇
  2009年   986篇
  2008年   1279篇
  2007年   1279篇
  2006年   1135篇
  2005年   989篇
  2004年   965篇
  2003年   897篇
  2002年   906篇
  2001年   1637篇
  2000年   1626篇
  1999年   1151篇
  1998年   491篇
  1997年   460篇
  1995年   434篇
  1992年   938篇
  1991年   862篇
  1990年   862篇
  1989年   824篇
  1988年   807篇
  1987年   729篇
  1986年   751篇
  1985年   794篇
  1984年   643篇
  1983年   572篇
  1982年   427篇
  1979年   636篇
  1978年   476篇
  1977年   430篇
  1976年   429篇
  1975年   535篇
  1974年   655篇
  1973年   635篇
  1972年   584篇
  1971年   491篇
  1970年   454篇
  1969年   515篇
  1968年   604篇
  1967年   513篇
  1966年   518篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
13.
14.
15.
16.
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   
17.
18.
The authors tested effects of a 10-week group cognitive-behavioral stress management intervention among 100 women newly treated for Stage 0-II breast cancer. The intervention reduced prevalence of moderate depression (which remained relatively stable in the control condition) but did not affect other measures of emotional distress. The intervention also increased participants' reports that having breast cancer had made positive contributions to their lives, and it increased generalized optimism. Both remained significantly elevated at a 3-month follow-up of the intervention. Further analysis revealed that the intervention had its greatest impact on these 2 variables among women who were lowest in optimism at baseline. Discussion centers on the importance of examining positive responses to traumatic events--growth, appreciation of life, shift in priorities, and positive affect-as well as negative responses.  相似文献   
19.
20.
Using a Piagétan perspective, this study investigated the ways in which elementary school children perceive changes in the size of a televised image (in this case, a candy bar). The findings suggest that younger children perceive changes in image size from a medium shot to a close-up as changes in the object itself. Children's responses to changes in the televised image parallel their responses to traditional conservation tasks, but conservation of televised images occurs at a later age. In addition, children appear to use different cognitive skills to interpret how a zoom or a cut transforms the size of a televised image. When a zoom is used, children more readily perceive the object as “growing larger.”  相似文献   
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