全文获取类型
收费全文 | 17119篇 |
免费 | 571篇 |
国内免费 | 5篇 |
专业分类
各国政治 | 704篇 |
工人农民 | 778篇 |
世界政治 | 1223篇 |
外交国际关系 | 569篇 |
法律 | 10897篇 |
中国共产党 | 6篇 |
中国政治 | 159篇 |
政治理论 | 3164篇 |
综合类 | 195篇 |
出版年
2020年 | 231篇 |
2019年 | 285篇 |
2018年 | 359篇 |
2017年 | 415篇 |
2016年 | 416篇 |
2015年 | 309篇 |
2014年 | 327篇 |
2013年 | 1563篇 |
2012年 | 473篇 |
2011年 | 505篇 |
2010年 | 407篇 |
2009年 | 434篇 |
2008年 | 518篇 |
2007年 | 565篇 |
2006年 | 569篇 |
2005年 | 515篇 |
2004年 | 492篇 |
2003年 | 528篇 |
2002年 | 458篇 |
2001年 | 681篇 |
2000年 | 557篇 |
1999年 | 490篇 |
1998年 | 254篇 |
1997年 | 179篇 |
1996年 | 215篇 |
1995年 | 182篇 |
1994年 | 208篇 |
1993年 | 207篇 |
1992年 | 323篇 |
1991年 | 357篇 |
1990年 | 346篇 |
1989年 | 290篇 |
1988年 | 327篇 |
1987年 | 278篇 |
1986年 | 323篇 |
1985年 | 290篇 |
1984年 | 235篇 |
1983年 | 226篇 |
1982年 | 181篇 |
1981年 | 193篇 |
1980年 | 132篇 |
1979年 | 176篇 |
1978年 | 125篇 |
1977年 | 108篇 |
1976年 | 100篇 |
1975年 | 126篇 |
1974年 | 134篇 |
1973年 | 107篇 |
1972年 | 101篇 |
1969年 | 99篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
821.
Laura A. Reese 《Canadian public administration. Administration publique du Canada》1992,35(2):237-249
It is clear that urban economic development practices in Ontario tend to cluster in certain classifications. The most widely and consistently used practices are in the area of marketing. On average, nine out of eleven techniques are practised by the cities surveyed. Governance tools and infrastructure investments are also fairly widely employed, with an average of six out of ten uniformly used. Governmental regulations, land and property management activities, and financial tools are less widely employed, with averages of five of thirteen, four of eleven, and two of twelve techniques practised by all cities respectively. In total, cities in Ontario employ an average of twenty-five out of fifty-seven economic development techniques listed. The ten most widely practised techniques across all categories are identified in Table 6. Again, marketing activities figure predominantly. However, landbased incentives and initiatives such as land acquisition, industrial zoning and industrial parks, and infrastructure improvements also are important. Based on these findings, it appears that cities in Ontario offer a range of economic development incentives which conforms closely to those widely practised by other cities. Marketing, site acquisition, and infrastructure improvement are among the most commonly used techniques according to literature. Indeed, because much of the literature focuses on cities in the United States, this research also suggests that similar economic development incentives are offered by cities in Canada and the United States. However, financial incentives such as tax abatements, loans, and loan guarantees are notable by their absence in Ontario cities. Does the limitation on bonuses affect economic development practices in the other categories? In other words, what appears to be the result of provincial restrictions on bonuses? Based on survey results and personal interviews with a small sample of economic development officials in Ontario, it does seem that restrictions have had some impact. While common techniques do centre in the marketing and land based areas, it appears that Ontario cities are also more likely to use more innovative means of attracting economic development. For example, business incubators and training programs are utilized by over 25 per cent of the cities. Thus these techniques, often promoted in the literature as more advantageous to cities, seem to be used more widely in Ontario than in many other cities. Regulations to limit or control certain facets of development also seem more prevalent than easing governmental regulations to promote development. Finally, some innovative techniques such as awards for research and development are also evident. While many economic development officials acknowledge that provincial restrictions limit their ability to compete with other cities, particularly those in the United States (52 per cent agree), they are split over whether such restrictions are too extreme (40 per cent feel they are too restricted, 43 per cent feel that they are not). In interviews it was often suggested that such limitations do reduce the inter-city competition for development which often drives economic development policies in cities that are allowed to offer tax abatements and other incentives. Further research is warranted to explore more fully the effect of restrictions on economic development bonuses. If such limitations regularly result in practices that are judged to be effective in promoting economic development, then such policies as those contained in the Municipal Act appear promising. 相似文献
822.
Central to this article is the question, “Are tax expenditure reports used?” State legislators serving on tax committees in ten states were surveyed regarding their use and their perceptions of others' use of tax expenditure report information. Responses indicate (1) strong acceptance and broad use of report information; (2) purposes and policy stages of use characteristic of technical information use; and (3) use focused predominantly on resource acquisition (revenue) policy rather than resource allocation (budget) policy. Thus it appears that tax expenditure reporting does not operate to secure budgetary control over tax expenditures, and consequently tax expenditures continue largely to escape budget scrutiny. 相似文献
823.
Natural resource management policies like the Pacific salmon harvest policy developed by New York State often did not anticipate the extent of social, economic, and ethical concerns that would be generated, largely because the agency concentrated on biological considerations. The number of concerned stakeholders grew in proportion to both the success and failure of the initial policy. Had all participants been equally willing to recognize both the successes and the failures, development of a revised policy through group negotiations may have been possible, resulting in a cooperative mode of decision making. Instead, institutional mechanisms based on legislated process were ultimately the approach chosen for policy revision. 相似文献
824.
825.
826.
827.
Mindy A. Herman-Stabl Mark Stemmler Anne C. Petersen 《Journal of youth and adolescence》1995,24(6):649-665
We conducted a short-term longitudinal study examining the structure of coping behavior and the relationship between coping style and depression during adolescence. The sample consisted of 603 adolescents in Grades 6–11 who were surveyed in the fall of 1989 and again in the fall of 1990. A two-dimensional model of coping was found using confirmatory factor analysis with the factors being approach and avoidant coping. Four cross-sectional and seven longitudinal coping groups were formed to explore group differences in depression. Approach copers reported the fewest symptoms of depression, while avoidant copers reported the most. Subjects who changed over time from approach to avoidant coping evidenced a significant increase in depressive symptoms, whereas subjects who switched from avoidant to approach coping displayed a significant decrease in depression over a one-year period. These findings imply that adolescents who are able to elicit social support, engage in problem solving, and cognitively restructure events within a positive light are more likely to successfully negotiate the challenges of adolescence.This research was supported by a grant from the William T. Grant Foundation (8912789), Anne C. Petersen, Principal Investigator. The writing of this article was supported by the National Institute of Mental Health Research Training Grant 5 T32MH18387-06 in Child Mental Health/Primary Prevention.Received Ph.D. in Human Development and Family Studies from Pennsylvania State University. Research interests include adolescent mental health and community research.Received his Ph.D. in Human Development and Family Studies from Pennsylvania State University. Research interests include adolescent mental health and research methodology.Received degree from the University of Chicago. Research interests are in biopsychosocial development in adolescence, with a focus on sex differences in mental health. 相似文献
828.
Mark D. Weist Abby H. Freedman David A. Paskewitz Eric J. Proescher Lois T. Flaherty 《Journal of youth and adolescence》1995,24(6):705-721
Explored the influence of life stress as mediated or moderated by locus of control, family environment, social support, and coping style on psychological adjustment and school performance in 164 ninth graders from Baltimore. Gender differences in findings were shown. For boys, family cohesion was the only variable found to protect against the effects of stress. Family cohesion did not serve protective functions for girls, and along with overall social support, was associated with increased vulnerability to school problems. The report of problem-focused coping strategies exerted a number of protective functions for girls only. External locus of control was found to increase boys' and girls' vulnerability to the effects of life stress. Empirical development of interventions to improve the psychosocial adjustment of inner-city adolescents is discussed.Received Ph.D. from Virginia Polytechnic Institute and State University in 1991. Research interests include evaluation of school mental health services, empirical development of interventions for children, and the impact of violence on urban youth.Received B.A. from Cornell University. Interests include stress and coping in children, identification of resilience factors, and evaluation of child mental health systems of care.Received Ph.D. from the University of Oklahoma in 1967. Research interests include psychophysiology, sleep disorders, and biofeedback and instrumentation.Received B.A. from Loyola College. Interested in applied work with adolescents and adults.Received M.D. from Duke University in 1968. Research interests include training in child and adolescent psychiatry, adolescent psychopathology, and the development of school mental health programs. 相似文献
829.
830.
Federalism, as a concept and as a reality, received assistancefrom a variety of sources during 19941995. Opinion pollsrevealed a public strongly supportive of shifts in the balanceof power between federal and state governments. The new Republican-controlledCongress, bent on devolving authority to the states, busieditself with an ambitious legislative agenda. The DemocraticPresident pursued his principles of federalism and intergovernmentalrelations by supporting the unfunded mandates bill and by increasingthe use of the administrative waiver. The U.S. Supreme Courtbolstered federalism with its rulings in cases such as Lopez,a state challenge to the federal Gun-Free School Zones Act.The new mood in Washington, D.C. was complemented by state leadersanxious to take on the challenges of a rebalanced federal system 相似文献