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   40910篇
  免费   1614篇
  国内免费   27篇
  2020年   445篇
  2019年   469篇
  2018年   641篇
  2017年   665篇
  2016年   722篇
  2015年   558篇
  2014年   611篇
  2013年   3034篇
  2012年   1156篇
  2011年   1257篇
  2010年   753篇
  2009年   737篇
  2008年   1033篇
  2007年   964篇
  2006年   855篇
  2005年   792篇
  2004年   759篇
  2003年   744篇
  2002年   758篇
  2001年   1292篇
  2000年   1283篇
  1999年   878篇
  1998年   416篇
  1997年   390篇
  1992年   783篇
  1991年   741篇
  1990年   749篇
  1989年   749篇
  1988年   697篇
  1987年   674篇
  1986年   716篇
  1985年   743篇
  1984年   618篇
  1983年   562篇
  1982年   391篇
  1981年   423篇
  1979年   599篇
  1978年   461篇
  1977年   400篇
  1976年   388篇
  1975年   566篇
  1974年   669篇
  1973年   646篇
  1972年   588篇
  1971年   549篇
  1970年   506篇
  1969年   577篇
  1968年   660篇
  1967年   615篇
  1966年   602篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
831.
It is proposed that society should re-examine its assumptions about suicide. Rational suicide is viewed as an extension of the right to die. After a review of the legal liability of the psychotherapist and psychiatric facility for both inpatient and outpatient suicide, the author presents an analysis of philosophical, ethical, and psychoanalytic arguments for allowing rational suicide. It is argued that emotional pain should be given more legitimacy as a reason for suicide. The decision to live or to die is argued to best rest with the individual.  相似文献   
832.
Smokers and nonsmokers were compared on three aspects of academic achievement. Although exactly the same percentage of smokers and nonsmokers passed the first-year university examination, smokers obtained significantly higher marks. Similarly, smokers achieved significantly higher marks in their final year examinations in comparison with nonsmokers. Finally, a comparison of the tutorial essay marks of the smokers and nonsmokers again showed that smokers obtained significantly higher marks than nonsmokers. These data are consistent with the idea that ambitious students adopt smoking in the belief that it will help them study and sustain concentration.  相似文献   
833.
834.
Engelhardt HT 《Zygon》1984,19(3):281-295
Abstract. This article argues that there are neither moral considerations that in principle forbid the development or use of recom-binant DNA technology, nor grounds to hold that its application is likely to cause more harm than good. A defensible moral position would enjoin a prudent assessment of consequences, rather than an absolute prohibition. The technology may remain controversial because it presupposes the difference between being a person, an entity who can evaluate and manipulate its own biological structure, and human-ness as a biological structure likely to be the subject of engineering over the long-range future.  相似文献   
835.
Previous reports of age-of-acquisition effects have been theoretically ambiguous since, in any particular individual, word age-of-acquisition is perfectly correlated with the length of time that a word has been known. The study reported in this article attempted to disentangle effects of word age-of-acquisition and length of word residence time in lexical memory. To this end, words varying in recency-of-introduction to British English were presented in a word-naming task to 46 native speakers whose ages ranged from 20 to 58 years. Using subjects’ ratings of the words on age-of-acquisition, it was possible to assess word residence times and to compare the effects on naming speeds of age-of-acquisition and residence times. Regression analyses indicated that age-of-acquisition was a more important factor than residence time in the word-naming task.  相似文献   
836.
Suicide and rurality in urban society   总被引:3,自引:0,他引:3  
Recent findings suggest that suicide increases with rurality, but research on rural suicide leaves many questions unanswered. This study specifies problems of community organization as a reason for expecting a positive effect of rurality on the suicide rate. A multiple regression analysis of county data shows that rurality has a substantial positive effect and is, in fact, the best predictor of the suicide rate among several variables selected from the previous literature. Additional research is needed to test the interpretation that rurality contributes to an incomplete, fragmented form of community organization which influences the suicide rate by disrupting primary relationships.  相似文献   
837.
One purpose of this investigation was to examine the importance of assessing treatment integrity in a study evaluating a treatment for specific anxiety disorders. Three subjects, two social phobics and one simple phobic, received self-instruction training (Phase I) followed by exposure and self-instruction training (Phase II) in a multiple baseline across subjects design. All subjects were assessed during a pretreatment baseline and throughout treatment using measures of treatment integrity and measures of change in phobic severity. Improvement took place at different times for different subjects. Measures of treatment integrity, which consisted of monitoring of self-statements as well as practice outside the session, indicated that treatment was not always received as intended and that improvement was correlated with practice. The usefulness of measures of treatment integrity in both clinical and research settings is highlighted.  相似文献   
838.
839.
The ability to recognize and analyze a personal legend in the conversation of an older person is a useful tool for the skilled, compassionate conversation partner. Having isolated the legend, the empathic listener can offer the teller of the legend the gift of an understanding, clarifying interpretation of its significance.Carolyn K. Dennis, M. Th., is assistant chaplain and program coordinator of the health care lay ministry training program at Gaston Episcopal Hospital, in Dallas, Texas.  相似文献   
840.
Kinetic subjective contours   总被引:2,自引:0,他引:2  
  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