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   85006篇
  免费   3402篇
  国内免费   23篇
  88431篇
  2020年   804篇
  2019年   1090篇
  2018年   1437篇
  2017年   1488篇
  2016年   1561篇
  2015年   1126篇
  2014年   1366篇
  2013年   6327篇
  2012年   2509篇
  2011年   2700篇
  2010年   1667篇
  2009年   1659篇
  2008年   2398篇
  2007年   2394篇
  2006年   2205篇
  2005年   1961篇
  2004年   1852篇
  2003年   1721篇
  2002年   1862篇
  2001年   2669篇
  2000年   2564篇
  1999年   1962篇
  1998年   996篇
  1997年   869篇
  1996年   860篇
  1992年   1626篇
  1991年   1519篇
  1990年   1522篇
  1989年   1425篇
  1988年   1399篇
  1987年   1331篇
  1986年   1413篇
  1985年   1473篇
  1984年   1229篇
  1983年   1138篇
  1982年   855篇
  1981年   844篇
  1979年   1342篇
  1978年   958篇
  1976年   809篇
  1975年   1100篇
  1974年   1204篇
  1973年   1288篇
  1972年   1074篇
  1971年   1022篇
  1970年   930篇
  1969年   986篇
  1968年   1231篇
  1967年   1106篇
  1966年   973篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
931.
Behavioral analysis of sexual dysfunction in Hansen's disease   总被引:1,自引:0,他引:1  
Human sexual behavior is an interactive process including CNS, hormonal, and sex-gland activities. This process can be disrupted in males who have Hansen's disease if testicular atrophy occurs. Elevations of centrally mediated luteinizing hormone and deficient testosterone levels were found in a male with Hansen's disease whose insufficient erections were secondary to atrophic testes. Quasi-experimental (A-B) analysis provided evidence for the efficacy of testosterone treatment for such a condition.  相似文献   
932.
The subjects were 16 college students assessed as having normal, uncorrected visual abilities. Each subject responded to the appearance of each of five variously colored ball sections as they were introduced into the subjects' visual field. Analysis indicated that colors with luminance values greater than 70 CD/M2 (black, blue, green) were detected further in the horizontal peripheral plane than were colors possessing values less than 36 CD/M2 (red, purple).  相似文献   
933.
Human figure drawings of 12 pediatric oncology patients were significantly smaller in height, width, and area than were drawings of 12 school children and 12 pediatric general surgery patients paired for sex and age. The Goodenough-Harris scores of the cancer patients' drawings were also significantly lower than those of both school and general surgery groups. It is hypothesized that anxiety, lowered self-esteem, and the effects of chemotherapy contributed to these findings.  相似文献   
934.
Subjects in a prior study of complex learning often experienced difficulty in mastering the task because of an apparent reluctance to release one perceptual field and reconstrue the task on a higher cognitive level. It was hypothesized that were this the correct explanation, the faster learners would be more field independent on a measure of field dependence, since independence has been defined in terms of ease in releasing one's attention from the immediate perceptual field. This hypothesis was tested with 22 undergraduate subjects for whom Group Embedded Figures Test scores were correlated with the number of trials to completion on the complex learning task. A moderate but significant correlation supported the hypothesis.  相似文献   
935.
The association of left lateral eye-movement with emotionality or arousal of affect and of right lateral eye-movement with cognitive/interpretive operations and functions was investigated. Participants were junior and senior students enrolled in an undergraduate course in developmental psychology. There were 37 women and 13 men, ranging from 19 to 45 yr. of age. Using videotaped lateral eye-movements of 50 participants' responses to 15 visually presented stimuli (precategorized as neutral, emotional, or intellectual), content and statistical analyses supported the association between left lateral eye-movement and emotional arousal and between right lateral eye-movement and cognitive functions. Precategorized visual stimuli included items such as a ball (neutral), gun (emotional), and calculator (intellectual). The findings are congruent with existing lateral eye-movement literature and also are additive by using visual stimuli that do not require the explicit response or implicit processing of verbal questioning.  相似文献   
936.
A property of attitudes, namely, the fact that attitudes select facts, is used to comment upon a paper on handedness and career choice.  相似文献   
937.
Effects of presentation complexity on rapid-sequential reading   总被引:1,自引:0,他引:1  
  相似文献   
938.
939.
940.
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