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   55052篇
  免费   2221篇
  国内免费   31篇
  57304篇
  2020年   627篇
  2019年   795篇
  2018年   1142篇
  2017年   1132篇
  2016年   1220篇
  2015年   810篇
  2014年   997篇
  2013年   4866篇
  2012年   1785篇
  2011年   1936篇
  2010年   1132篇
  2009年   1140篇
  2008年   1750篇
  2007年   1734篇
  2006年   1521篇
  2005年   1382篇
  2004年   1363篇
  2003年   1244篇
  2002年   1271篇
  2001年   1806篇
  2000年   1708篇
  1999年   1309篇
  1998年   700篇
  1997年   611篇
  1996年   556篇
  1995年   570篇
  1994年   536篇
  1993年   551篇
  1992年   1050篇
  1991年   981篇
  1990年   976篇
  1989年   874篇
  1988年   846篇
  1987年   822篇
  1986年   826篇
  1985年   886篇
  1984年   697篇
  1983年   600篇
  1982年   496篇
  1979年   682篇
  1978年   511篇
  1976年   453篇
  1975年   607篇
  1974年   642篇
  1973年   609篇
  1972年   549篇
  1971年   485篇
  1968年   547篇
  1967年   546篇
  1966年   477篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
171.
From a random sample of 49 patients suffering from torticollis spasmodicus and dependence on alcohol or medicaments, 6 have been selected and are discussed with i view to findings possible mutual influences between the disorders. In particular, premorbid accentuation of personality presented itself as a potential risk factor leading to both tortocollis and alcoholism. In various cases, the patient makes use of alcohol for self-treatment of extrapyramidal-motor symptoms. But such phenomenological developments are preceded by varied constellations of conditions, that have to be taken into account in the treatment.  相似文献   
172.
173.
Midlife depression and the "empty nest" syndrome in Indian women   总被引:2,自引:0,他引:2  
  相似文献   
174.
175.
The constituents of the complex affective experience of envy are delineated, and defenses against each of these constituents are explored. Attention is then called to a common, variably adaptive, and socially approved means of obviating or coping with envious feelings, involving a partial identification and culminating in the conscious experience of "being proud of." A conjecture is made regarding the kind of pathology most likely to interfere with this mechanism.  相似文献   
176.
177.
178.
179.
180.
Practice in front of a mirror is a common procedure for activities such as dance, gymnastics, and other sports. The purpose of this study was to examine the effect that performing with concurrent visual feedback from a mirror had on the acquisition of the power clean movement. 18 college-age males who had no prior experience with the power clean movement served as subjects who were assigned to one of two groups. One group had use of a mirror during the practice trials and the other practiced without the mirror. All subjects viewed an instructional videotape and had practice trials. All subjects were evaluated for proper technique on a pretest, a posttest without the mirror, and a posttest with the mirror. Analysis showed a significant difference between pre- and posttest performances for both groups and a significant difference between groups on the posttest performances with the mirror. Evidently the videotaped instruction was sufficient to allow both groups to improve in performance of the power clean. Differences in posttest performances with the mirror reflected the type of feedback (with or without the mirror) available during training.  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