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   60754篇
  免费   2406篇
  国内免费   23篇
  2020年   580篇
  2019年   651篇
  2018年   917篇
  2017年   945篇
  2016年   1037篇
  2015年   771篇
  2014年   899篇
  2013年   4338篇
  2012年   1684篇
  2011年   1696篇
  2010年   1118篇
  2009年   1042篇
  2008年   1560篇
  2007年   1478篇
  2006年   1323篇
  2005年   1210篇
  2004年   1187篇
  2003年   1115篇
  2002年   1142篇
  2001年   1782篇
  2000年   1741篇
  1999年   1306篇
  1998年   633篇
  1997年   592篇
  1996年   577篇
  1992年   1230篇
  1991年   1174篇
  1990年   1171篇
  1989年   1047篇
  1988年   1048篇
  1987年   1009篇
  1986年   1066篇
  1985年   1126篇
  1984年   895篇
  1983年   804篇
  1981年   584篇
  1979年   1007篇
  1978年   710篇
  1977年   654篇
  1976年   665篇
  1975年   864篇
  1974年   1035篇
  1973年   1092篇
  1972年   891篇
  1971年   876篇
  1970年   825篇
  1969年   845篇
  1968年   1101篇
  1967年   979篇
  1966年   932篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
961.
962.
Within a multivariate statistical design, the relationship of various interpersonal, emotional, and cognitive variables to suicidal ideation and behavior in college students was examined. A total of 158 subjects (58 males, 100 females) completed self-report measures of life stress, faulty cognitions, loneliness, depression, hopelessness, family cohesiveness, adaptive reasons for living, and suicidal ideation and behavior. The results of a multiple-regression analysis, forward-inclusion algorithm, indicated that a predictive equation consisting of loneliness, irrational beliefs, and low adaptive reasons for living best accounted for suicidal behavior scores. To determine the basic structures and power of the predictor variables under study, a factor analysis and composite regression were employed, resulting in a predictive equation consisting of three factors: Social/Emotional Alienation, Cognitive Distortions, and Deficient Adaptive Resources. Results are discussed in terms of an interactional model of suicidal behavior.  相似文献   
963.
964.
"A random sample of Mexican American women and a sample of family planning health care professionals, both from two major southwestern cities in the United States, were compared in terms of their reports of birth control methods used, problems in obtaining family planning services, and values involved in making fertility-related decisions, within the Mexican American population.... While there were points of agreement between the two samples, discrepancies were found in reports of problems in obtaining family planning services, fertility-related values, and in the acceptability of female sterilization as a birth control method. It was concluded that family planning professionals in these service areas tend to stereotype Mexican American women, and may not yet realize that the family planning attitudes and behavior of these women are probably changing in significant ways." (SUMMARY IN SPA)  相似文献   
965.
R. Melvin Keiser 《Zygon》1987,22(3):317-337
Abstract. Michael Polanyi names Augustine as inaugurates of his "postcritical"philosophy. To understand what this means by exploring creation in the Confessions will clarify complex problems in Augustine and articulate theological implications in Polanyi. Specifically, it will show why an autobiographical account of conversion ends speaking of creation; how creation can thus be understood as "personal" language; how creation can be recovered in a time preoccupied with conversion; how conversion and creation are linked with incarnation, hermeneutics, and confessional rhetoric; and it will suggest a contemporary use of creation language that connects the scientific and the religious.  相似文献   
966.
967.
968.
The results of an evaluation of the perfusion scintigraphy findings of 350 hospitalised neurological patients and 55 more strictly selected neurosurgical patients with cerebrovascular complaints, revealed an accuraty of 83%, a sensitivity of 89%, and a specificity of 83%. The selection of the patients had no influence on the results as a whole. Compared with contrast-medium angiography, incorrect diagnosis must be expected in 17% of the cases. This includes erroneous negative findings in 10% of the cases. Grounds for misinterpretations are suggested, and the biological and methodological limitations of the method are set forth.  相似文献   
969.
The paper is concerned with an attempt to generalize and categorize current hypotheses on the biochemical basis of ECT. The hypotheses are critically evaluated with respect to the relevance of their experimental fundamentals. Thus, certain hypotheses are valid only in a qualified sense. Particular interest is focussed on those conceptions which try to correlate ECT-induced changes in synaptic receptor sensitivities (up-/down-regulation) with super- resp. subsensitivity hypotheses of psychoses. In this connection, noradrenergic and opioid systems on the one hand, and the axis hypothalamus-hypophysis on the other hand seem to play a dominant role.  相似文献   
970.
The centenary of Hermann Emminghaus's monograph "Die psychischen St?rungen des Kindesalters" ("The Psychic Disorders of Childhood") gives occasion to appreciate the life and work of the founder of modern children and youth psychiatry. Children and youth psychiatry, in the G.D.R., operates on the principle of sub-specialization out of its parent subjects. In this, Hermann Emminghaus's basic views, as expressed in his monograph of 1887, are confirmed.  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