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   66657篇
  免费   2700篇
  国内免费   20篇
  2020年   614篇
  2019年   786篇
  2018年   1067篇
  2017年   1098篇
  2016年   1147篇
  2015年   856篇
  2014年   1021篇
  2013年   4748篇
  2012年   1947篇
  2011年   1977篇
  2010年   1209篇
  2009年   1169篇
  2008年   1745篇
  2007年   1719篇
  2006年   1562篇
  2005年   1452篇
  2004年   1381篇
  2003年   1260篇
  2002年   1292篇
  2001年   2060篇
  2000年   1924篇
  1999年   1463篇
  1998年   724篇
  1996年   605篇
  1992年   1309篇
  1991年   1230篇
  1990年   1211篇
  1989年   1139篇
  1988年   1143篇
  1987年   1093篇
  1986年   1131篇
  1985年   1230篇
  1984年   952篇
  1983年   900篇
  1982年   686篇
  1981年   654篇
  1979年   1112篇
  1978年   752篇
  1977年   681篇
  1976年   717篇
  1975年   935篇
  1974年   1066篇
  1973年   1129篇
  1972年   953篇
  1971年   876篇
  1970年   878篇
  1969年   894篇
  1968年   1141篇
  1967年   1013篇
  1966年   934篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
241.
Inexperienced beer-drinkers who could not pass a beer-flavor discrimination test were divided into a taste group, which received additional perceptual experience with beer flavors; a verbal group, which received instruction in beer flavor terminology; a taste/verbal group, which received both additional experience and instruction; and a control group. Before and after training, all subjects participated in a similarity rating task involving beer flavors and flavor-related adjectives. Additional taste experience--but not increased experience with beer-flavor terminology--improved novices' ability to detect identical beer flavors. Results are discussed in terms of the trainability of flavor discrimination and the role of cognitive factors (both flavor-related and flavor-independent) in marketing beverages.  相似文献   
242.
Subjects were presented with word pairs (e.g., bed-mattress) and timed as they decided whether one word named part of the item named by the other word. Yes responses were facilitated, and no responses were impeded, by relation similarity (i.e., the similarity of the relation between the two stimulus items to the part-whole relation). Item similarity, the similarity of the two stimulus items to each other, had no effect. The results support the view that similarity effects in semantic decision tasks are due to the comparison of elements of the relation between the two stimulus words against relation elements that serve as criteria for the target relation that the subject has been asked to identify.  相似文献   
243.
Thirty pediatricians and 30 parents were interviewed on (a) how and when children develop concepts about death, (b) children's emotional responses to the thought of death, (c) the possibility of dialogue between adults and children about death, and (d) differences in healthy and seriously ill children's conceptualization of death. Pediatricians were no different than parents in their opinions. Moreover, in some cases, less educated parents and older doctors tended to hold opinions that were even farther from reality. Overall, the results suggest that children, healthy or sick, are left alone with the problem of death and are not helped either by their parents or by their doctors.  相似文献   
244.
Although peers' and teachers' evaluations of children's prosocial behavior and peers' sociometric ratings frequently have been used in studies of social development, the validity of young children's ratings of others has been questioned, as has that for teachers' ratings of prosocial behavior. In this study, preschoolers' ratings of peers' sociometric status and prosocial behavior, as well as teachers' ratings of children's prosocial dispositions, were obtained. These were correlated with children's naturally occurring prosocial or social behavior; ratings of prosocial behavior also were correlated with children's prosocial moral reasoning and prosocial self-attributions. Peers' sociometric ratings were positively related to children's sociability whereas prosocial ratings were related to helping (but not sharing) behavior. Teachers' ratings of prosocial behavior were not related to frequency of prosocial behaviors, but were positively related to developmentally mature moral judgments and self-reported motives.  相似文献   
245.
246.
Tobacco, alcohol, and drug use are problems for American-Indian people. We reviewed these problems and the explanations for them and described a bicultural competence skills approach for preventing substance abuse with American-Indian adolescents. Data from a study of that approach suggest its efficacy with American-Indian youth. At posttest and a 6-month follow-up, American-Indian subjects who received preventive intervention based on bicultural competence skills concepts improved more than did American-Indian subjects in a no-intervention control condition on measures of substance-use knowledge, attitudes, and interactive skills, and on self-reported rates of tobacco, alcohol, and drug use. Our findings have implications for future substance-abuse prevention research with American-Indian people.  相似文献   
247.
Training in systemic therapy necessitates a structured approach to teaching systemic thinking. The Systemic Therapy Sessions Summary Form, a record-keeping method, is presented as a tool for enhancing training in systemic therapy. The purpose of this form is to provide the structure for the trainee to develop circular hypotheses, to connect reflexively the assessment and intervention components of therapy, and to maintain a sense of the evolving nature of therapy across sessions. A case example illustrates the use of this record-keeping format.  相似文献   
248.
The present study demonstrates the safety and effectiveness of an outpatient program designed to respond to adolescent-precipitated crises by mobilizing and restructuring the family's kinship system. Families of 75 adolescents at risk for hospitalization were followed up to 24 months after treatment with Systemic Crisis Intervention. Measures of offspring and family functioning, suicidal behavior, institutional use, and treatment costs are presented. Results clearly demonstrate the safety, effectiveness, and economic viability of Systemic Crisis Intervention.  相似文献   
249.
250.
Depressed affect and time perception   总被引:1,自引:0,他引:1  
  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