全文获取类型
收费全文 | 23155篇 |
免费 | 394篇 |
专业分类
管理学 | 3152篇 |
民族学 | 99篇 |
人才学 | 2篇 |
人口学 | 2188篇 |
丛书文集 | 134篇 |
教育普及 | 3篇 |
理论方法论 | 2080篇 |
现状及发展 | 1篇 |
综合类 | 465篇 |
社会学 | 11177篇 |
统计学 | 4248篇 |
出版年
2023年 | 134篇 |
2021年 | 128篇 |
2020年 | 352篇 |
2019年 | 438篇 |
2018年 | 492篇 |
2017年 | 717篇 |
2016年 | 554篇 |
2015年 | 403篇 |
2014年 | 474篇 |
2013年 | 3845篇 |
2012年 | 748篇 |
2011年 | 630篇 |
2010年 | 462篇 |
2009年 | 472篇 |
2008年 | 534篇 |
2007年 | 537篇 |
2006年 | 464篇 |
2005年 | 595篇 |
2004年 | 522篇 |
2003年 | 450篇 |
2002年 | 502篇 |
2001年 | 565篇 |
2000年 | 556篇 |
1999年 | 547篇 |
1998年 | 373篇 |
1997年 | 352篇 |
1996年 | 358篇 |
1995年 | 336篇 |
1994年 | 321篇 |
1993年 | 315篇 |
1992年 | 386篇 |
1991年 | 358篇 |
1990年 | 345篇 |
1989年 | 376篇 |
1988年 | 331篇 |
1987年 | 305篇 |
1986年 | 309篇 |
1985年 | 327篇 |
1984年 | 342篇 |
1983年 | 335篇 |
1982年 | 270篇 |
1981年 | 232篇 |
1980年 | 226篇 |
1979年 | 286篇 |
1978年 | 217篇 |
1977年 | 196篇 |
1976年 | 180篇 |
1975年 | 173篇 |
1974年 | 167篇 |
1973年 | 157篇 |
排序方式: 共有10000条查询结果,搜索用时 16 毫秒
101.
Peter R. Gross 《Work and stress》1994,8(1):68-74
Although empathy has been found to distinguish effective counsellors from less effective counsellors, human services professionals who continually experience negative emotional reactions to the feelings that clients express in counselling may be at risk of developing burnout. This study examined the hypothesis that emotional empathy rather than cognitive empathy is associated with burnout. The sample of human services professionals consisted of 71 Salvation Army Officers. Multiple regression was used to investigate whether the dimensions of empathy could predict three aspects of burnout: personal accomplishment, emotional exhaustion and depersonalization. The first regression analysis indicated that personal distress and empathic concern were significant predictor of personal accomplishment. The second analysis indicated that personal distress was a significant predictor of emotional exhaustion. The third indicated that empathic concern was a significant predictor of depersonalization. Although these results support the hypothesis, personal distress was negatively associated with personal accomplishment, whereas empathic concern was positively associated with personal accomplishment. The small size of the sample may have influenced the reliability of the findings. A multidimensional approach to the role of empathy in counselling may help human services professionals to manage their emotional reactions when they engage in counselling with distressed clients. 相似文献
102.
103.
Since children, particularly daughters, are among the most important sources of help and support for older Americans, it has been suggested that women's increasing employment will affect filial relations. Empirical evidence on this issue is inconsistent, in part due to the use of nonprobability samples. Few studies have measured effects for men. We attempt to broaden the scope of this question beyond help to the frail elderly by asking whether employment affects filial relations in general. We examine effects of hours employed on telephone contact, visiting, feelings of closeness, filial attitudes, and assistance to biological parents, for an area probability sample of men and women over 40. There are no effects of employment for men or women on contact, closeness, or assistance. For the vast majority of this population sample, contact and assistance involve few hours per week, and thus do not seem to conflict with employment. 相似文献
104.
105.
106.
107.
108.
John C. Harsanyi 《Social Choice and Welfare》1995,12(4):319-333
Ethics can be divided into a theory of prudential values and a theory of morality in a narrower sense. My paper proposes a utilitarian — a rule-utilitarian — theory of morality. But it deviates from most of the utilitarian tradition by rejecting the hedonistic and subjectivistic accounts of prudential values favored by many utilitarian writers. While economists tend to define people's utility levels in terms of their actual preferences, ethics must define them in terms of their informed preferences. To prefer A over B does not mean to have a stronger desire for A than for B. Rather, it means to regard one's access to A as being more important than one's access to B. Even though different people often have quite different preferences, their basic desires seem to be much the same. We must choose our moral rules, and our society's moral code as a whole, by their social utility. An important factor in determining their social utility are their expectation effects. Unlike the rule — utilitarian more code, the act — utilitarian moral code would be unable to give proper weight to these expectation effects. It would also unduly restrict our individual freedom. Finally, I shall argue against Kant that morality is primarily a servant of many other human values rather than itself the highest value of human life. 相似文献
109.
The present study was conducted to assess differences in the behavioral and demographic characteristics of snuff (dip) users as compared to users of chewing tobacco. High School football players (1116) were surveyed concerning their use and perceptions of smokeless tobacco. Adolescent athletes who tried smokeless tobacco were more likely to be white, to use cigarettes, alcohol, and cigars and to have family users than those who never tried. Initial use was highest before the age of fourteen years and was influenced by friends, curiosity and family. Dippers tended to initiate use because of friends, while chewers started because of family users. Users of both dip and chew started primarily because of curiosity. Users of both were more likely to consume greater amounts to alcohol and cigarettes and to smoke cigars and pipes. It appears that the longer smokeless tobacco is consumed, the more likely both dip and chew will be used. Users of smokeless tobacco for more than two years tended to consume more of the product each week, used it for more hours/day, initiated use at an earlier age, and used it more often at school and work than those using it for less than two years. Use of cigars/pipes, consumption of alcohol, and quantity of cigarette consumption increased significantly with longer duration of smokeless tobacco use. Intervention and prevention programs would be helped by understanding differences between users of various smokeless tobacco products and differences related to the duration of use. In addition, further analyses of smokeless tobacco users should study chewers, dippers, and users of both separately. 相似文献
110.
This report summarizes the proceedings of a conference on quantitative methods for assessing the risks of developmental toxicants. The conference was planned by a subcommittee of the National Research Council's Committee on Risk Assessment Methodology 4 in conjunction with staff from several federal agencies, including the U.S. Environmental Protection Agency, U.S. Food and Drug Administration, U.S. Consumer Products Safety Commission, and Health and Welfare Canada. Issues discussed at the workshop included computerized techniques for hazard identification, use of human and animal data for defining risks in a clinical setting, relationships between end points in developmental toxicity testing, reference dose calculations for developmental toxicology, analysis of quantitative dose-response data, mechanisms of developmental toxicity, physiologically based pharmacokinetic models, and structure-activity relationships. Although a formal consensus was not sought, many participants favored the evolution of quantitative techniques for developmental toxicology risk assessment, including the replacement of lowest observed adverse effect levels (LOAELs) and no observed adverse effect levels (NOAELs) with the benchmark dose methodology. 相似文献