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   76222篇
  免费   2444篇
  国内免费   24篇
  78690篇
  2020年   717篇
  2019年   848篇
  2018年   4288篇
  2017年   3714篇
  2016年   3265篇
  2015年   1083篇
  2014年   1167篇
  2013年   5158篇
  2012年   2551篇
  2011年   4166篇
  2010年   3529篇
  2009年   2614篇
  2008年   3311篇
  2007年   3716篇
  2006年   1605篇
  2005年   1521篇
  2004年   1503篇
  2003年   1389篇
  2002年   1282篇
  2001年   1981篇
  2000年   1866篇
  1999年   1386篇
  1998年   656篇
  1997年   556篇
  1996年   640篇
  1995年   565篇
  1994年   553篇
  1993年   539篇
  1992年   1127篇
  1991年   1032篇
  1990年   1018篇
  1989年   965篇
  1988年   955篇
  1987年   875篇
  1986年   869篇
  1985年   913篇
  1984年   748篇
  1983年   634篇
  1982年   487篇
  1979年   763篇
  1978年   570篇
  1975年   603篇
  1974年   684篇
  1973年   709篇
  1972年   614篇
  1971年   568篇
  1970年   486篇
  1968年   616篇
  1967年   534篇
  1966年   509篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
881.
Analysts' emotional attitudes toward countertransference issues are influenced by unduly perfectionistic ideals that are partly derived from the early period of psychoanalytic theory. Analysts' unconscious receptivity, whether of the beneficially empathic kind or the disadvantageous countertransference variety, is a reflection of a dynamic internal state. This fundamental relationship between empathy and countertransference is illustrated with examples. Important events that occur in the life of the analyst, by virtue of their impact on his own central compromise formations, cannot but affect his analytic functioning. Minor disturbances in analytic capability are commonplace and do not significantly handicap effective work.  相似文献   
882.
883.
884.
Aerobic exercise which resulted in a significant improvement in cardiovascular functioning had no more effect on psychological mood states than did the placebo control of participation in nonaerobic recreational games or no exercise and sport at all (N = 430 college students). Beta-endorphin levels with the 41 depressed subjects were not a biochemical link that might explain the possible influence of physical activity on depression.  相似文献   
885.
The performance of 81 gifted elementary students on the Visual Aural Digit Span test is discussed. The students generally showed advanced performance from Grade 1 through Grade 5 and from age 7-0 yr. through 11-11 yr. Performance at Grade 6 and the 12-0 to 12-11-yr.-old levels were generally at age-expected levels and were probably restricted due to the test's limited ceiling. Tables of means across grade and age and needs for further research are also presented.  相似文献   
886.
9 stutterers and 9 nonstutterers were administered a dichotic digits test under conditions of free recall and directed attention. Analysis indicated right-ear preference for both groups and no differences between the free recall and directed listening conditions. Results are discussed in relation to previous studies in which dichotic digit-stimuli were presented to stutterers.  相似文献   
887.
6 adult subjects (3 men, 3 women) produced highly similar spontaneous speech utterances in quiet and with 90-dB SPL white noise. The frequency of occurrence of perceptual judgments of primary stressing in an utterance was not affected by the masking noise. This finding supplements our previous report that variability for stress production of fundamental frequency (fo) during spontaneous speech was preserved under short-term auditory disruption. Also, it adds further support to the contention that fo is under open-loop regulation.  相似文献   
888.
889.
Punctuation in 20 radio homilies by four speakers accounted for 76% of pause time and 64% of pause number. Pause duration varied systematically according to punctuation type. Commas accounted for 82% of punctuated positionsnot used for pausing.RRelevance for theories of text unitization is discussed. Both typographical and temporal measures are compared with a similar corpus of German homilies.  相似文献   
890.
Two different concepts of distinguishability are often mixed up in attempts to derive in quantum mechanics the (anti)symmetry of the wave function from indistinguishability of identical particles. Some of these attempts are analyzed and shown to be defective. It is argued that, although identical particles should be considered as observationally indistinguishable in (anti)symmetric states, they may be considered to be conceptually distinguishable. These two notions of (in)distinguishability have quite different physical origins, the former one being related to observations while the latter has to do with the preparation of the system.  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