全文获取类型
收费全文 | 24294篇 |
免费 | 1089篇 |
国内免费 | 16篇 |
出版年
2020年 | 344篇 |
2019年 | 406篇 |
2018年 | 603篇 |
2017年 | 575篇 |
2016年 | 602篇 |
2015年 | 432篇 |
2014年 | 529篇 |
2013年 | 2293篇 |
2012年 | 928篇 |
2011年 | 991篇 |
2010年 | 607篇 |
2009年 | 600篇 |
2008年 | 841篇 |
2007年 | 819篇 |
2006年 | 815篇 |
2005年 | 719篇 |
2004年 | 671篇 |
2003年 | 671篇 |
2002年 | 666篇 |
2001年 | 652篇 |
2000年 | 603篇 |
1999年 | 480篇 |
1998年 | 302篇 |
1997年 | 290篇 |
1996年 | 282篇 |
1995年 | 258篇 |
1994年 | 232篇 |
1993年 | 239篇 |
1992年 | 344篇 |
1991年 | 362篇 |
1990年 | 332篇 |
1989年 | 317篇 |
1988年 | 289篇 |
1987年 | 298篇 |
1986年 | 299篇 |
1985年 | 332篇 |
1984年 | 317篇 |
1983年 | 247篇 |
1982年 | 242篇 |
1981年 | 229篇 |
1980年 | 205篇 |
1979年 | 251篇 |
1978年 | 211篇 |
1977年 | 203篇 |
1976年 | 197篇 |
1975年 | 229篇 |
1974年 | 259篇 |
1973年 | 263篇 |
1972年 | 209篇 |
1968年 | 202篇 |
排序方式: 共有10000条查询结果,搜索用时 515 毫秒
151.
David J. Doukas 《Theoretical medicine and bioethics》1992,13(1):5-14
The emergence of the ethics consultation as a means to resolve moral crises in clinical medicine has revealed the need for a worksheet that would facilitate intake and analysis. The author developed the Bioethics Consultation Form as an attempt to remedy this need. The form is arranged in an outline format and is a useful asset to ethics committee discussions and record keeping. The first section covers basic intake data concerning the patient's medical and personal information, advance directives, and values, as well as the values of the physician and family. After the intake section is completed with the above data, the ethics consultant then turns to the analysis section. This second section allows for (1) the discussion of conflicting values, (2) the identification of priorities, and (3) the elucidation of ethical norms relevant to the case.The Bioethics Consultation Form was adopted by the Patient Care Advisory committee of the Franklin Square Hospital Center in Baltimore, Maryland in 1986. The methodology in the use of the form will be discussed. Further, the potential spectrum of consultative cases that can be analyzed using the form will be highlighted. 相似文献
152.
David Hay 《Journal of Beliefs & Values》1992,13(2):6-8
A rule of thinking which would absolutely prevent me from acknowledging certain kinds of truth, if those kinds of truth were really there, would be an irrational rule. 相似文献
153.
154.
Daniel D. Houlihan Robert N. Jones Howard N. Sloane Joni Cook 《Behavioral Interventions》1992,7(1):71-77
This brief report proposes an extension of the traditional Alternating Treatments Design that would be acceptable to use in hospital and residential settings where subjects are often not concurrently available. Concerns about the inability of traditional designs to work in these special situations and the emergence of a “scientist–practitioner split” are discussed. An example of how the Extended Alternating Treatments Design might be used is provided. 相似文献
155.
Age-dependent facilitation of taste-footshock conditioning by prior exposure to the training context
Among adult rats, gustatory stimuli are easily associated with illness, but not with external unconditioned stimuli such as footshock. Recent evidence indicates, however, that this cue-to-consequence specificity may vary ontongenetically. The present studies examined the acquisition of an aversion to a taste paired with footshock in 5- and 15-day-old rats. Consistent with previous reports, 5-day-old rats avoided the taste that preceded footshock, while 15-day-old subjects did not express an aversion to the taste paired with footshock. Exposure to the training context for either 1 or 5 h prior to conditioning disrupted taste-footshock conditioning in the 5-day-old subjects. For the 15-day-old subjects, 1 h of pre-conditioning exposure to the training context had no effect on conditioning, whereas a longer duration of preexposure promoted conditioning to the taste cue. The results suggest ontogenetic differences in stimulus selection. 相似文献
156.
The naturalistic fallacy occurs when a person reads a report of scientific research and concludes that the moral implication of the research was included in the article when, in fact, it was not. For example, the fallacy is committed when a study contains the conclusion that TV advertising increases preference for sugar-based foods, but the reader later believes that the study concluded that TV advertising should be controlled. Previous research indicates that the commission of the fallacy was strong when memory for social research was tested. The present study showed that the commission of the fallacy was stronger when the research which was read involved children as subjects compared to adult subjects. Increased empathy for the subjects of a research article strengthens commission of the fallacy. 相似文献
157.
Effects of personal experience on self-protective behavior 总被引:11,自引:0,他引:11
N D Weinstein 《Psychological bulletin》1989,105(1):31-50
This article seeks to further our understanding of self-protective behavior by examining the effects of a particularly powerful stimulus to action: personal experience. It reviews the effects of automobile accidents on seat belt use, criminal victimization other than rape on individual crime prevention efforts, natural hazards experience on both natural hazards preparedness and compliance with evacuation warnings, and myocardial infarction on smoking. Theories suggesting mechanisms that could link personal experience to behavior are described, and data concerning the effects of experience on some key variables in these theories are discussed. Tentative propositions are offered to resolve the many apparent discrepancies in this literature. These propositions concern the effects of experience on risk perceptions, the influence of experience on risk salience, the specificity of responses to victimization, and the duration of experience effects. 相似文献
158.
H N Garb 《Psychological bulletin》1989,105(3):387-396
Reviews studies on training, experience, and clinical judgment. The results on the validity of judgments generally fail to support the value of on-the-job experience in mental health fields. The validity results do provide limited support for the value of training. Other results suggest that experienced clinicians are better than less experienced judges at knowing which of their judgments are likely to be correct and which are likely to be wrong. Reasons why clinicians have trouble learning from experience are given. Recommendations are made for improving training and clinical practice. 相似文献
159.
The Psychological Record - The present experiments investigated blocking effects in rhesus monkeys (Macaca mulatta) in a discrimination learning paradigm using a single stimulus modality. Two... 相似文献
160.