全文获取类型
收费全文 | 18080篇 |
免费 | 1386篇 |
专业分类
各国政治 | 648篇 |
工人农民 | 612篇 |
世界政治 | 1319篇 |
外交国际关系 | 507篇 |
法律 | 13136篇 |
中国共产党 | 1篇 |
中国政治 | 127篇 |
政治理论 | 3007篇 |
综合类 | 109篇 |
出版年
2020年 | 402篇 |
2019年 | 437篇 |
2018年 | 494篇 |
2017年 | 580篇 |
2016年 | 608篇 |
2015年 | 515篇 |
2014年 | 553篇 |
2013年 | 1794篇 |
2012年 | 426篇 |
2011年 | 530篇 |
2010年 | 651篇 |
2009年 | 620篇 |
2008年 | 443篇 |
2007年 | 450篇 |
2006年 | 548篇 |
2005年 | 406篇 |
2004年 | 388篇 |
2003年 | 412篇 |
2002年 | 359篇 |
2001年 | 707篇 |
2000年 | 599篇 |
1999年 | 493篇 |
1998年 | 229篇 |
1997年 | 195篇 |
1996年 | 178篇 |
1995年 | 198篇 |
1994年 | 207篇 |
1993年 | 175篇 |
1992年 | 341篇 |
1991年 | 359篇 |
1990年 | 338篇 |
1989年 | 374篇 |
1988年 | 328篇 |
1987年 | 312篇 |
1986年 | 320篇 |
1985年 | 348篇 |
1984年 | 317篇 |
1983年 | 310篇 |
1982年 | 232篇 |
1981年 | 211篇 |
1980年 | 189篇 |
1979年 | 235篇 |
1978年 | 163篇 |
1977年 | 142篇 |
1976年 | 120篇 |
1975年 | 113篇 |
1974年 | 131篇 |
1973年 | 121篇 |
1972年 | 93篇 |
1971年 | 104篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
931.
Based on findings from the 1970s, research literature on senior government executives emphasized a growing integration of politics and administration. This integration was reflected in what we called the "Image IV" bureaucrat wherein political role traits combined with those of traditional bureaucratic ones. Although this was by no means a dominant trend, we were led to speculate that traditional divisions between political and bureaucratic roles were eroding. Data gathered from the 1980s and 1990s, however, lead us to infer that divisions between political and bureaucratic roles have reasserted themselves and that integration between them is being diminished rather than strengthened. We conclude that this may be because in an era of governmental austerity the demand for executive policy entrepreneurs has slackened while the political needs have shifted to those of managerial control over an inertial or even contracting state. 相似文献
932.
Puberty has been related to the onset of a variety of weight concerns and eating problems among middle school girls, including body dissatisfaction, dieting, and eating disorders. At least two models can be used to explain these relationships. The first emphasizes the timing of puberty, arguing that girls who face early puberty are particularly stressed because of the off-time nature of the event. The second focuses on synchronous events. For girls more than boys, puberty is likely to coincide with the change from elementary to middle school and/or beginning to date. Such synchronous events may create greater stress for girls. Seventy-nine girls were tested during the spring of their sixth- and eighth-grade years. Pubertal and dating status, body dissatisfaction, weight management, and eating disordered attitudes (using the Children's EAT:ChEAT) were assessed. The simple timing model (early vs. on time vs. late) was not supported. The simple synchronous model received some support in that girls with synchronous onset of menstruation and dating had higher ChEAT scores as well as greater body dissatisfaction. However, the data indicated that girls for whom puberty was early and coincidental with dating might be at unusual risk. These girls showed the highest levels of body dissatisfaction and the highest ChEAT scores.Ph.D. from Temple University. Research interest is in developmental psychology.Ph.D. from the University of California at Santa BarbaraThese authors have a joint research program in the developmental psychopathology of eating problems.The first wave of data for this report was collected as part of her undergraduate honors thesis.Earlier versions of these data were presented at the 1991 meeting of the Society for Research in Child Development, Seattle, Washington and the 1992 Conference on Human Development, Atlanta, Georgia. 相似文献
933.
Constance Flanagan John Schulenberg Andrew Fuligni Ph.D. candidate 《Journal of youth and adolescence》1993,22(2):171-189
The relationship of residential setting (living with parents vs. living away from home while attending college) and gender with late adolescents' perceptions of their relationships with parents was examined. Four hundred four undergraduates students (mean age=20 years, 4 months) from two midwestern universities completed surveys. Two hundred four subjects lived with their parents and commuted to school, and 200 lived away at college. Controlling for student's age, parents' education, and financial and family considerations as factors in the choice of a college, living away was associated with greater independence, support, and mutual respect between parents and adolescents. In contrast, students who lived at home felt parents underestimated their maturity, and reported more conflict and avoidance in their relationships with parents. Regardless of residential setting, women reported more mutuality and support in their relationships with parents than men. The results suggest the importance of considering contextual issues during the transition to adulthood.This research was supported by a Campus Grant to the first author from the University of Michigan-Dearborn.Received Ph.D. in developmental psychology from the University of Michigan. Research interests include family relationships, cross-cultural studies, and political development in adolescence and young adulthood.Received Ph.D. in human development and family studies from Penn State University. Research interests include competence during the transition to young adulthood, career development, drug and alcohol use.Research interests include adolescents' relationships with parents and peers and cross-cultural studies. 相似文献
934.
Abstract: This paper compares and contrasts the application of competitive tendering policies in the public and private sectors. It is based on information derived from a large-scale survey of public and private sector organisations in New South Wales. Analysis of the survey responses suggests a common approach to the basic elements of the tendering (market-testing) process. However, there are also some important differences, the most striking of which is that public sector organisations advertise more frequently and generally review more tenders. Despite this, there appears to be little difference in the degree of effective competition achieved between the two sectors. More generally, while nearly all organisations surveyed collect information that is relevant to performance evaluation, it does not appear to be systematic or rigorous enough to secure contract compliance. 相似文献
935.
The progressivity and equity of both state and federal individual income taxes, as well as the combined system of both taxes, are examined before and after the federal Tax Reform Act of 1986 using a variety of measures applied to federal Statistics of Income individual income tax data; state taxes are calculated using TAXSIM. Our findings are as follows: First, in both 1985 and 1987, state personal income taxes were generally less progressive and more horizontally equitable than the federal system. Second, in moving from 1985 to 1987, state personal income tax systems generally displayed decreased progressivity and horizontal inequity. The combination of the two systems displayed generally lower progressivity and horizontal equity scores when we compare 1987 to 1985. Last, the after-tax income distribution became more unequal when we compared 1987 to 1985. 相似文献
936.
Robert P. Inman 《Journal of policy analysis and management》1993,12(1):156-180
The U.S. federalist public economy is an ever-evolving system of financing and expenditure responsibilities between local, state, and federal governments. The past decades have seen a significant centralization of responsibility for the financing of state and local public services through grants-in-aid and federal tax subsidies. This article advances a model of local constituent influence in central government fiscal policies which seeks to explain this trend, and then examines how strong executive branch and congressional leadership might begin to control the local pressures for central government financing. TRA86 is offered as one example in which this leaedership proved effective. The general lesson is that good fiscal policy in federalist public economies requires not only capable local governments, but central government political institutions with the strength to meet national needs as well. 相似文献
937.
A 6-year longitudinal panel study investigated the absolute and relative stability in depressed mood throughout adolescence by reporting data from a sample of 538 adolescents between 13 and 19 years of age. Results revealed the following. (1) Girls had on average higher depressed mood scores than boys at all ages. (2) Among boys there were no substantial changes in depressed mood mean scores, while among girls there was a slight tendency of a curvilinear trend, with a peak level reached in midadolescence. (3) There was a tendency for adolescents to retain their relative level in depressed mood, most pronounced for a period of 4 years, from age 15 to age 19 years. (4) Depressed mood was most stable in a subgroup of adolescents who had high initial depressed mood scores. (5) By applying structural equation modeling, it was shown that the stable (trait) component of depressed mood increased in importance with increasing age, while the temporal (state) component decreased with increased age. 相似文献
938.
Journal of Youth and Adolescence - Do mothers' and fathers' attitudes towards their children's academic performance influence children's perceptions of their academic competence?... 相似文献
939.
940.