全文获取类型
收费全文 | 82020篇 |
免费 | 2386篇 |
国内免费 | 29篇 |
出版年
2019年 | 746篇 |
2018年 | 4243篇 |
2017年 | 3579篇 |
2016年 | 3156篇 |
2015年 | 969篇 |
2014年 | 1012篇 |
2013年 | 5617篇 |
2012年 | 2158篇 |
2011年 | 3960篇 |
2010年 | 3460篇 |
2009年 | 2488篇 |
2008年 | 3182篇 |
2007年 | 3512篇 |
2006年 | 1419篇 |
2005年 | 1384篇 |
2004年 | 1267篇 |
2003年 | 1303篇 |
2002年 | 1156篇 |
2001年 | 2145篇 |
2000年 | 2115篇 |
1999年 | 1553篇 |
1998年 | 720篇 |
1996年 | 721篇 |
1995年 | 688篇 |
1994年 | 698篇 |
1993年 | 655篇 |
1992年 | 1437篇 |
1991年 | 1340篇 |
1990年 | 1336篇 |
1989年 | 1195篇 |
1988年 | 1161篇 |
1987年 | 1166篇 |
1986年 | 1126篇 |
1985年 | 1186篇 |
1984年 | 996篇 |
1983年 | 805篇 |
1981年 | 658篇 |
1979年 | 957篇 |
1978年 | 719篇 |
1976年 | 648篇 |
1975年 | 886篇 |
1974年 | 876篇 |
1973年 | 1001篇 |
1972年 | 868篇 |
1971年 | 760篇 |
1970年 | 703篇 |
1969年 | 690篇 |
1968年 | 855篇 |
1967年 | 741篇 |
1966年 | 775篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
271.
272.
T D Crespi 《Adolescence》1988,23(92):805-811
The effectiveness of a time-out intervention for adolescent psychiatric patients, adjudicated (delinquent) youth, and behaviorally disordered youngsters was explored in this study. The research was conducted in three psychiatric hospitals for children and adolescents, a facility for adjudicated youth, and in a day-treatment program. Utilizing a comparative outcome model, 813 occurrences of time-out with 274 youth were investigated in order to assess levels of effectiveness. The results indicated that time-out had a significant impact, and the use of a child-care specialist as time-out monitor improves overall effectiveness. Important implications for practicing professionals and clinical researchers are noted. 相似文献
273.
274.
275.
Context and structure in conceptual combination 总被引:8,自引:0,他引:8
276.
S Baron-Cohen 《Cognition》1988,29(1):83-84
277.
Two modes of learning for interactive tasks 总被引:5,自引:0,他引:5
278.
Perlin E 《Journal of religion and health》1988,27(4):279-284
The care of the patient with cancer requires the development not only of a medical plan, but an ethical plan as well. This plan should integrate the physician's and the patient's perceptions of medical and ethical propriety. Jewish biomedical ethical principles are based on the teaching of the Old Testament and its various interpretations. In this paper, I discuss how these principles can be used to help guide the physician caring for the patient with cancer. Other ethical systems could be applied in a similar fashion. 相似文献
279.
280.
Robert A. Caldwell G. Anne Bogat William S. Davidson II 《American journal of community psychology》1988,16(5):609-624
A frequently advocated strategy for increasing the efficiency of child abuse prevention programs is to deliver prevention services to "high-risk" populations. This article critically reviews procedures for the reliable and valid assessment of child abuse potential within an ecological perspective. Factors that limit the usefulness of child abuse risk assessment are discussed. These factors include the uncertain criteria of child abuse and neglect, the low base rate of the phenomenon, and the financial and social costs of such procedures. Finally, the prevention implications of the current and future state of the art in child abuse risk assessment are considered and preventive interventions that do not depend on individual case risk screening are advocated. 相似文献