全文获取类型
收费全文 | 3884篇 |
免费 | 258篇 |
国内免费 | 2篇 |
专业分类
4144篇 |
出版年
2023年 | 43篇 |
2022年 | 33篇 |
2021年 | 46篇 |
2020年 | 102篇 |
2019年 | 137篇 |
2018年 | 149篇 |
2017年 | 168篇 |
2016年 | 157篇 |
2015年 | 114篇 |
2014年 | 146篇 |
2013年 | 515篇 |
2012年 | 192篇 |
2011年 | 223篇 |
2010年 | 123篇 |
2009年 | 144篇 |
2008年 | 192篇 |
2007年 | 140篇 |
2006年 | 153篇 |
2005年 | 132篇 |
2004年 | 149篇 |
2003年 | 128篇 |
2002年 | 117篇 |
2001年 | 48篇 |
2000年 | 52篇 |
1999年 | 32篇 |
1998年 | 44篇 |
1997年 | 42篇 |
1996年 | 37篇 |
1995年 | 25篇 |
1994年 | 23篇 |
1993年 | 17篇 |
1992年 | 28篇 |
1991年 | 22篇 |
1990年 | 28篇 |
1989年 | 25篇 |
1988年 | 21篇 |
1987年 | 29篇 |
1986年 | 28篇 |
1985年 | 30篇 |
1984年 | 31篇 |
1983年 | 34篇 |
1982年 | 24篇 |
1981年 | 18篇 |
1980年 | 30篇 |
1979年 | 22篇 |
1978年 | 16篇 |
1977年 | 22篇 |
1976年 | 19篇 |
1974年 | 10篇 |
1973年 | 9篇 |
排序方式: 共有4144条查询结果,搜索用时 46 毫秒
31.
Dr. Andrew N. Rowan 《Science and engineering ethics》1995,1(2):181-184
Conclusion The past one hundred fifty years of debate over the use of animals in research and testing has been characterized mainly byad hominem attacks and on uncritical rejection of the other sides’ arguments. In the classroom, it is important to avoid repeating exercises
in public relations and to demand sound scholarship.
This paper is a modification of material originally included in the handbook which accompanied the American Association for
the Advancement of Science (AAAS) Seminar “Teaching Ethics in Science and Engineering”, 10–11 February 1993. 相似文献
32.
33.
34.
Meredith Child Kathryn Graff Low Cheryl McDonell McCormick Andrew Cocciarella 《Sex roles》1996,34(5-6):447-455
Transsexuals, because of their attempts at gender reversal, offer a unique opportunity to study self-presentation, social roles, and stereotypes. The present study is a content analysis of personal advertisements of male-to-female transsexuals (TM, N =99), homosexual (HoM, N =64) and heterosexual men (HM, N =99), and heterosexual women (HW, N =99). Advertisements were coded for the presence or absence of 11 characteristics either offered or sought, based on the 1984 work of Deaux and Hanna. The content of TM personal advertisements was significantly different from those of HW, HM, or HoM. TM mentioned physical characteristics and sincerity, and requested friendship most often; HoM mentioned sexuality most often; HM offered financial security and status in the form of occupation, and listed marital status most often; and HW offered personality characteristics and attractiveness most often. Several factors may contribute to the pattern of differences observed, including the fact that TM were more likely to be seeking friendship than sexual partners, in contrast to the other three groups. 相似文献
35.
Brendan Gail Rule Ronald Dyck Andrew R. Nesdale 《European journal of social psychology》1978,8(2):237-244
The purpose of the present research was to assess the relative influence of instigation or inhibition in mediating retaliation after arbitrary or non-arbitrary frustration. Sixty-four men were asked to learn a concept that was being taught by a peer. Although all men were frustrated, half were deliberately frustrated while the other half were not deliberately frustrated by the teacher. Following the task, the learner was given the opportunity to prevent the teacher from gaining employment under conditions where his evaluation was either anonymous or to be made public. The results of a 2 × 2 analysis of variance yielded several significant effects. The data revealed that subjects rejected the teacher more when the frustration was arbitrary than when it was non-arbitrary. Moreover, when the evaluation was anonymous, subjects rejected the teacher more than when the evaluation was to be made public. Furthermore, the difference in the amount of rejection expressed between arbitrary and non-arbitrary conditions was greater when the evaluation was anonymous than when it was public. These results were interpreted as demonstrating the greater contribution of instigatory rather than inhibitory factors in expressing aggression following deliberate or non-deliberate frustration. 相似文献
36.
37.
38.
Andrew F. Bambrick 《Contemporary Family Therapy》1980,2(2):99-105
Science asks that a theory state its basic terms and operations with economy and precision. Twenty-two terms and operations of Zuk's Go-Between Process are defined. It is desirable in science also to carefully distinguish among related theories. Go-Between Process and Structural-Strategic Family Therapy are related theories, and differences are described. 相似文献
39.
Robert Barcus Andrew I. Schwebel Samuel A. Corson 《Integrative psychological & behavioral science》1980,15(4):183-187
This report describes the use of an animal model for testing the relationship between the effects of ingesting food additives and hyperactivity. Telomian × beagle hybrid dogs were chosen as subjects because this breed has been observed to exhibit behavior seen as analogous to the hyperactivity of children. Two studies were conducted by adding or deleting butylated hydroxyanisole and Food, Drug, and Cosmetic red dye number 40 to the diet of each dog. A test of sitting was performed to measure the level of activity. While a relationship was not observed between the ingestion of the additive and the level of activity, several issues pertaining to the use of the animal model became apparent. These issues and the use of animals for future research in this area are discussed. 相似文献
40.
The communication disorder in dialysis dementia is an integral feature of the syndrome. This report describes the communication disorder in a 67-year-old man over a period of 4 months from his admission to the hospital to his death. In the early stage of the syndrome, the most prominent feature was a speech problem, the characteristics of which may vary among cases. In the middle stage, it was difficult to distinguish among aphemia, aphasia, or a combination of dysarthria and confusional state. The severity of the problems in these stages was temporally related to the dialysis treatments. The final stage was characterized by constant mutism and was unrelated to the dialysis treatments. Death occurred 10 months after the communication problems emerged. Communication studies of dialysis dementia patients may offer a systematic method to monitor the course of the syndrome, its response to therapeutic trials, and a clinical model for the study of communication disorders in general. 相似文献