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   72852篇
  免费   3068篇
  国内免费   27篇
  2020年   889篇
  2019年   1061篇
  2018年   1532篇
  2017年   1517篇
  2016年   1600篇
  2015年   1125篇
  2014年   1371篇
  2013年   6443篇
  2012年   2588篇
  2011年   2619篇
  2010年   1586篇
  2009年   1568篇
  2008年   2251篇
  2007年   2186篇
  2006年   2010篇
  2005年   1688篇
  2004年   1670篇
  2003年   1593篇
  2002年   1523篇
  2001年   2261篇
  2000年   2212篇
  1999年   1609篇
  1998年   796篇
  1997年   673篇
  1996年   758篇
  1995年   682篇
  1994年   675篇
  1993年   650篇
  1992年   1336篇
  1991年   1248篇
  1990年   1250篇
  1989年   1190篇
  1988年   1152篇
  1987年   1054篇
  1986年   1055篇
  1985年   1110篇
  1984年   898篇
  1983年   806篇
  1979年   953篇
  1978年   750篇
  1975年   780篇
  1974年   893篇
  1973年   926篇
  1972年   805篇
  1971年   752篇
  1970年   626篇
  1969年   654篇
  1968年   823篇
  1967年   744篇
  1966年   691篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
921.
Plasma concentrations of imipramine and amitriptyline and their desmethylated metabolites were measured in 20 children being treated for major depressive illness 2 wk. and 5 to 10 wk. after achieving drug dosages of 2.25 mg/kg body weight. At 2 wk. all children had exhibited clinical improvement, but by 10 wk. 4 of the 10 children treated with imipramine and 5 of the 10 children treated with amitriptyline had experienced clinical relapse of depressive symptoms. Tricyclic antidepressant plasma concentrations and ratios were comparable in the subgroups of children who maintained their clinical improvement and those who relapsed. There was no evidence of a systematic decline in plasma tricyclic antidepressant concentrations in those children who relapsed.  相似文献   
922.
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   
923.
Tympanic thermometers were used to measure fluctuations in the temperature of the left and right hemispheres of 22 normal high school students while performing verbal and nonverbal visual discrimination tasks. The nonverbal task involving face recognition demonstrated the predicted effect of hemispheric bias on performance: The subjects performed better when they showed a relative rise in right-hemisphere temperature. No significant relationship between hemispheric temperature and level of performance was observed during the verbal task, perhaps owing to the opportunity to treat effectively the nonwords as either linguistic strings or visual patterns. It is concluded that tympanic temperature effectively measures hemispheric activity during cognitive processing.  相似文献   
924.
Groups of 12 normal and insomniac male subjects aged 55 to 71 yr. were sleep deprived for 64 hr. In both groups, the sleep loss was preceded by four baseline sleep nights and followed by four recovery nights. Reaction time, immediate recall, sleepiness, and body temperature were measured at approximately 2300, 0115, 0330, 0530, and 0800 during baseline, deprivation and recovery nights. Significant performance or mood differences were not found between the normal and insomniac males on any measure or at any testing period throughout the study. Performance of both groups declined characteristically during sleep loss while subjective sleepiness increased. As in young adults, degraded performance was restored by 8 hr. of recovery sleep. However, subjective sleepiness did not return to baseline levels until early in the second recovery night. It was concluded that chronic insomnia does not result in group performance deficits similar to those seen after chronic sleep loss; and the restorative function of sleep operates as efficiently in older insomniac subjects (who apparently have reduced need to sleep) as in older normal subjects.  相似文献   
925.
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   
926.
28 older women participating in an exercise program were compared to 30 older women not participating in an exercise program on two behavioral measures. There were no significant main effects for participation-nonparticipation in an exercise program. Significant main effects were found, however, for each of three social variables.  相似文献   
927.
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   
928.
This paper offers a critique of the prevailing epistemological assumptions which undergird modern Pastoral Care and Counseling education. By drawing upon emerging insights in Transpersonal Psychology and Consciousness disciplines, along with the ontological perspectives of Martin Heidegger and John Macquarrie, the attempt is made to reclaim the modes of knowing of William James and Anton Boison. This paper includes practical and concrete examples of how one supervisor is attempting to put a new paradigm into practice.  相似文献   
929.
Effects of presentation complexity on rapid-sequential reading   总被引:1,自引:0,他引:1  
  相似文献   
930.
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