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   179668篇
  免费   8138篇
  国内免费   158篇
  2020年   2814篇
  2019年   3497篇
  2018年   3624篇
  2017年   4064篇
  2016年   4738篇
  2015年   3996篇
  2014年   4864篇
  2013年   23921篇
  2012年   4752篇
  2011年   3894篇
  2010年   4024篇
  2009年   4889篇
  2008年   4178篇
  2007年   3657篇
  2006年   4225篇
  2005年   4178篇
  2004年   3727篇
  2003年   3354篇
  2002年   3159篇
  2001年   3548篇
  2000年   3372篇
  1999年   3314篇
  1998年   2896篇
  1997年   2747篇
  1996年   2650篇
  1995年   2472篇
  1994年   2444篇
  1993年   2382篇
  1992年   2749篇
  1991年   2585篇
  1990年   2453篇
  1989年   2334篇
  1988年   2302篇
  1987年   2304篇
  1986年   2317篇
  1985年   2526篇
  1984年   2628篇
  1983年   2422篇
  1982年   2416篇
  1981年   2400篇
  1980年   2230篇
  1979年   2291篇
  1978年   2243篇
  1977年   2202篇
  1976年   2027篇
  1975年   2098篇
  1974年   2164篇
  1973年   2049篇
  1972年   1636篇
  1971年   1565篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
951.
This paper examines the reactions of physicians and other health-professionals when they become involved in decisions about the death of their patients. The way people understand the condition of death has a profound influence on attitudes towards death and dying issues. Four traditional views of death are explored. The problem that physicians have in helping patients die (be it by hastening death through pain control, assisting patients in suicide or by more active means) is analyzed. Physicians, in dealing with such patients, must be mindful of their own, and their patients beliefs as well as mindful of the community in which such dying takes place. They must try to reconcile these often divergent views but can neither paternalistically deny patients their rational will, hide themselves behind an appeal to the law or go against their own deeply held moral views. When such views cannot be reconciled, compassionate transfer to a more compatible physician may be necessary.  相似文献   
952.
Males were randomly assigned to view either (1) a film clip featuring hockey fights or (2) a film of nonaggressive hockey action or (3) a no-film control condition after having first been angered or treated politely by an experimental confederate. The dependent variable was represented by a measure of aggressive mood and a behavioral measure of retaliatory aggression. Analyses revealed that both angered and nonangered subjects exhibited an increase in aggressive mood following exposure to the fight film. However, the analysis involving retaliatory aggression against the confederate yielded an anger x film interaction. While angered subjects were more aggressive than nonangered, only angered subjects retaliated against the confederate after viewing the fight film. The results were discussed in terms of Berkowitz’s (1974) aggressive cue theory. A version of this paper was presented at the meeting of the North American Society for the Sociology of Sport, Edmonton, Canada, November 1987.  相似文献   
953.
Fear of Success (FOS) was originally conceived as a unidimensional motive. However, there is both theoretical and empirical support for the hypothesis that FOS is multidimensional. We factor analyzed the responses of 236 undergraduates to twenty-oneConcern Over the Negative Consequences of Success items and found four factors. Our four factors show considerable overlap with dimensions based on theoretical accounts of FOS etiology as well as with the factor structures obtained from two other factor analytic studies. Thus, there is converging evidence that FOS is multidimensional. The relationship between multidimensional FOS and a multidimensional approach to achievement motivation is discussed.  相似文献   
954.
955.
956.
957.
958.
The purpose of this study was to document the responses of pharmacy students and pharmacists to various ethical dilemmas. The responses of the first professional year students, third professional year students and pharmacists were evaluated and compared. In most instances, responses indicated a high priority for patient/client welfare. Pharmacists and students reportedly act with regard to the dignity of life, individual freedom, and an inner sense of right.  相似文献   
959.
960.
Pigeons were trained to acquire a new four-response position sequence each day by pecking three response keys in a predetermined order. The key color varied after each correct response prior to food delivery. Acute administration of Γ9-tetrahydrocannabinol (Δ9-THC) up to a dose that completely eliminated responding, had no effect on total acquisition errors, or on within session patterns of error elimination. Chronic administration of Δ9-THC (3–10 mg/kg/day), either before or after the session for 4–7 weeks, also did not affect these error measures, although rates of responding were markedly suppressed and at times no responding occurred Discontinuation of Δ9-THC administration for periods of 4–6 weeks also was without effect on errors. These experiments suggest that neither acute nor chronic Δ9-THC produce specific effects on the repeated acquisition of serial position responses in pigeons.  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