全文获取类型
收费全文 | 31670篇 |
免费 | 1192篇 |
国内免费 | 18篇 |
专业分类
32880篇 |
出版年
2019年 | 409篇 |
2018年 | 562篇 |
2017年 | 610篇 |
2016年 | 571篇 |
2015年 | 426篇 |
2014年 | 480篇 |
2013年 | 2433篇 |
2012年 | 852篇 |
2011年 | 965篇 |
2010年 | 632篇 |
2009年 | 625篇 |
2008年 | 876篇 |
2007年 | 816篇 |
2006年 | 762篇 |
2005年 | 643篇 |
2004年 | 593篇 |
2003年 | 636篇 |
2002年 | 581篇 |
2001年 | 1195篇 |
2000年 | 1172篇 |
1999年 | 841篇 |
1998年 | 368篇 |
1997年 | 299篇 |
1996年 | 295篇 |
1995年 | 296篇 |
1994年 | 302篇 |
1992年 | 718篇 |
1991年 | 693篇 |
1990年 | 657篇 |
1989年 | 610篇 |
1988年 | 581篇 |
1987年 | 578篇 |
1986年 | 544篇 |
1985年 | 607篇 |
1984年 | 472篇 |
1983年 | 368篇 |
1979年 | 462篇 |
1978年 | 342篇 |
1977年 | 327篇 |
1976年 | 304篇 |
1975年 | 412篇 |
1974年 | 416篇 |
1973年 | 475篇 |
1972年 | 383篇 |
1971年 | 319篇 |
1970年 | 306篇 |
1969年 | 327篇 |
1968年 | 377篇 |
1967年 | 333篇 |
1966年 | 385篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
881.
Hermine S. Muskat 《Journal of counseling and development : JCD》1978,57(3):153-156
Women between the ages of 35 and 45 are entering U.S. colleges in increasing numbers. Although this life stage has received much current attention in educational and popular literature, there are unique questions that this population raises for college counselors. Why are they returning? What do they want from the college experience? What do they need? It is suggested that career counseling curricula, developed and taught by counselors, may effectively meet the needs of women reentering college. Specific components for the development of curricula are discussed. 相似文献
882.
883.
The difficulty of recording rodent ultrasonic vocalizations simultaneously with other behavior patterns has been overcome by the use of the apparatus described. The electronic circuitry automatically digitally codes specified frequencies of rodent ultrasounds on a behavioral recording device. A reliability study of its performance in recording vocalizations of copulating Mongolian gerbils, during experimental tests, is also described. 相似文献
884.
O. J. Andy L. P. Giurintano S. L. Giurintano 《Integrative psychological & behavioral science》1978,13(1):1-12
A neurophysiologic model for aggessive behavior in the cat is proposed. Stimulus-bound and seizure-bound aggression was evaluated in relation to limbic and basal ganglia induced seizures (after-discharges). Electrically induced limbic and basal ganglia afterdischarges were used because they are known to implicate septohypothalamic sites from which aggression can be elicited by direct stimulation. The occurrence of behavioral aggression is correlated with the discharge characteristics of a single discharging system and with two interacting discharging systems. Aggression is composed of autonomic and somato-motor components which poses relatively low and high thresholds, respectively, for their activation. Aggression occurring during a combined septum and amygdala discharge was more intense and prolonged than with a septum discharge alone. Participation of a slow frequency discharging basal ganglia system activated seizurebound aggression in an otherwise nonaggressive limbic seizure. The limbic and basal ganglia stimulations and after-discharges lowered the excitability threshold of the aggression system and made it more vulnerable to being activated by external stimuli, such as visual and auditory stimuli. These observations are reminiscent of patients with aggressive behavior associated with psychomotor seizures. 相似文献
885.
Integrative Psychological and Behavioral Science - This study was done to further analyze the neural mechanisms underlying aggressive behavior associated with psychomotor or temporal lobe seizures.... 相似文献
886.
887.
888.
A previous study of the habit reversal treatment of nailbiting was extended by using more subjects (97) and a comparison with an alternative method (negative practice). Negative practice reduced nailbiting episodes by about 60% whereas habit reversal reduced nailbiting episodes by about 99% throughout the 5-month follow-up. 相似文献
889.
890.
It is difficult to gain unambiguous evidence on the use of concepts by infants. Many results can be accounted for in terms of action-based strategies. The evidence reported here fulfils the minimal criteria for the operation of working concepts in infants. Search tasks are used with a filled interval which forces memory-search, and the object is hidden in containers which fulfil their customary job or violate it. Infants treat an upright cup as a more reliable location marker than an inverted one. A series of experiments probes the phenomenon. The results indicate that the infants have a working concept of containment which can be triggered by the provision of containers in their canonical orientation. Even “object permanence tasks” lead infants to access their knowledge of the relationships into which things typically enter in the world outside the laboratory. 相似文献