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   44337篇
  免费   902篇
  国内免费   11篇
  2020年   308篇
  2019年   290篇
  2018年   3792篇
  2017年   3178篇
  2016年   2622篇
  2015年   484篇
  2014年   467篇
  2013年   2054篇
  2012年   1329篇
  2011年   3123篇
  2010年   2941篇
  2009年   1853篇
  2008年   2338篇
  2007年   2754篇
  2006年   626篇
  2005年   706篇
  2004年   646篇
  2003年   563篇
  2002年   545篇
  2001年   773篇
  2000年   819篇
  1999年   581篇
  1998年   289篇
  1997年   241篇
  1992年   453篇
  1991年   422篇
  1990年   457篇
  1989年   421篇
  1988年   405篇
  1987年   406篇
  1986年   410篇
  1985年   430篇
  1984年   335篇
  1983年   300篇
  1982年   240篇
  1981年   218篇
  1979年   391篇
  1978年   279篇
  1977年   252篇
  1976年   223篇
  1975年   344篇
  1974年   374篇
  1973年   354篇
  1972年   333篇
  1971年   290篇
  1970年   260篇
  1969年   324篇
  1968年   362篇
  1967年   325篇
  1966年   331篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
3.
4.
Philosophia - We can hear silence because silence, an absence of sound, causes our hearing of it. Advocating this position, Roy Sorensen puts to use his own theory of the direct perception of...  相似文献   
5.
6.
7.
Evaluated the effect of varied physician affect on subject recall, anxiety, and perceptions in a simulated tense and ambiguous medical situation. Forty women at risk for breast cancer viewed videotapes of an oncologist presenting--with either worried or nonworried affect--mammogram results. Although the mammogram results and the oncologist were the same in both presentation, analyses indicated that, compared to the women receiving the results from a nonworried physician, the women receiving the results from a worried physician recalled significantly less information, perceived the clinical situation as significantly more severe, reported significantly higher levels of state anxiety, and had significantly higher pulse rates. These results suggest that physician affect plays a critical role in patient reaction to medical information. Implications for compliance research, patient satisfaction, and physician training are discussed.  相似文献   
8.
9.
OBJECTIVE: To test a theoretical model of how ethnic pride and self-control are related to risk and protective factors. DESIGN: A community sample of 670 African American youth (mean age = 11.2 years) were interviewed in households. MAIN OUTCOME MEASURES: Measures of cigarette smoking, alcohol use, and sexual behavior (lifetime to past month). RESULTS: Structural modeling analyses indicated parenting was related to self-control and self-esteem, and racial socialization was related to ethnic pride. Self-control and self-esteem variables were related to levels of deviance-prone attitudes and to perceptions of engagers in, or abstainers from, substance use and sexual behavior. The proximal factors (behavioral willingness, resistance efficacy, and peer behavior) had substantial relations to the criterion variables. Participant gender and parental education also had several paths in the model. Results were generally similar for the 2 outcome behaviors. CONCLUSIONS: In this population, self-esteem and self-control are related to parenting approaches and have pathways to attitudes and social perceptions that are significant factors for predisposing to, or protecting against, early involvement in substance use and sexual behavior.  相似文献   
10.
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