全文获取类型
收费全文 | 15754篇 |
免费 | 1335篇 |
专业分类
各国政治 | 626篇 |
工人农民 | 539篇 |
世界政治 | 1150篇 |
外交国际关系 | 405篇 |
法律 | 11418篇 |
中国共产党 | 2篇 |
中国政治 | 109篇 |
政治理论 | 2736篇 |
综合类 | 104篇 |
出版年
2020年 | 368篇 |
2019年 | 388篇 |
2018年 | 451篇 |
2017年 | 529篇 |
2016年 | 544篇 |
2015年 | 498篇 |
2014年 | 484篇 |
2013年 | 1604篇 |
2012年 | 384篇 |
2011年 | 458篇 |
2010年 | 610篇 |
2009年 | 556篇 |
2008年 | 394篇 |
2007年 | 364篇 |
2006年 | 469篇 |
2005年 | 355篇 |
2004年 | 343篇 |
2003年 | 335篇 |
2002年 | 305篇 |
2001年 | 584篇 |
2000年 | 490篇 |
1999年 | 406篇 |
1998年 | 205篇 |
1997年 | 178篇 |
1996年 | 142篇 |
1995年 | 178篇 |
1994年 | 187篇 |
1993年 | 157篇 |
1992年 | 295篇 |
1991年 | 312篇 |
1990年 | 311篇 |
1989年 | 304篇 |
1988年 | 277篇 |
1987年 | 251篇 |
1986年 | 299篇 |
1985年 | 319篇 |
1984年 | 284篇 |
1983年 | 256篇 |
1982年 | 194篇 |
1981年 | 170篇 |
1980年 | 170篇 |
1979年 | 191篇 |
1978年 | 136篇 |
1977年 | 105篇 |
1976年 | 99篇 |
1975年 | 110篇 |
1974年 | 136篇 |
1973年 | 112篇 |
1972年 | 95篇 |
1971年 | 81篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
61.
62.
63.
64.
This study probes the interconnections among distrust of government, the historical context, and public support for the death penalty in the United States with survey data for area-identified samples of white and black respondents. Multilevel statistical analyses indicate contrary effects of government distrust on support for the death penalty for blacks and whites, fostering death penalty support among whites and diminishing it among blacks. In addition, we find that the presence of a "vigilante tradition," as indicated by a history of lynching, promotes death penalty support among whites but not blacks. Finally, contrary to Zimring's argument in The Contradictions of Capital Punishment , we find no evidence that vigilantism moderates the influence of government distrust on support for the death penalty, for either whites or blacks. Our analyses highlight the continuing influence of historical context as well as contemporary conditions in the formation of public attitudes toward criminal punishment, and they underscore the importance of attending to racial differences in the analysis of punitive attitudes. 相似文献
65.
In the statistical interpretation of forensic glass evidence it is standard practice to make the assumption of homogeneity of the refractive index (RI) of the source glass, or of localized homogeneity. However, the work of Locke and Hayes showed that, for toughened windscreen glass, this assumption might not be true. This work is well cited, but there appears to have been little follow-on published research. Furthermore, the toughening process is something known to affect the refractive index, and is a process that float glass does not undergo. Float glass is a major component of casework in New Zealand and for that reason it would be interesting to know whether the findings of Locke and Hayes apply when dealing with float glass. In this paper we describe an experiment similar to that of Locke and Hayes, systematically examining the variation of RI in a pane of float window glass. It was found that, although there were no systematic differences in refractive index, there were observable differences across the pane. 相似文献
66.
In many countries it is left to the discretion of the court to accept or reject conclusions based on sampling procedures as applied to the total drug exhibit. As an alternative to this subjective approach, a statistical basis is presented using binomial and hypergeometric distributions to determine a lower limit for the proportion of units in a population which contains a drug, at a given confidence level. A method for calculating the total weight of a drug present in a population within a given confidence interval is also presented. In the event of no failures (all units sampled contain a drug), a sample size of six or seven units is generally sufficient to state that a proportion of at least 0.70 of the population contains a drug at a confidence level of at least 90%. When failures do occur in the sample, point estimation is used as the basis for selecting the appropriate sample size. 相似文献
67.
68.
Michelle Wierson Sarah D. Nousiainen Rex Forehand Amanda McCombs Thomas 《Journal of family violence》1992,7(1):9-18
Much attention has been paid to the nature of parent-adolescent relationships, with a frequent conclusion being that it is a time of marked disagreement between parents and their adolescents. However, other literature suggests that this time is not inherently conflictual. The purpose of this study was to examine agreement and disagreement between mothers, fathers, and adolescents on specific issues. Then, adolescent adjustment was assessed, and the degree to which it was a function of congruence with parents was examined. A modified version of the Issues Checklist was used to measure intrafamily agreement; the Revised Behavior Problem Checklist and the Harter Scale of Child's Actual Competence were completed by adolescents' social studies teachers to assess adolescent functioning. Relative to their parents, adolescents reported that they should make more decisions alone, while both mothers and fathers reported that decisions should be made jointly among all family members. Only father-adolescent congruence was found consistently to be related to adolescent functioning. Possible explanations for the present results and relevant issues pertaining to family agreement are discussed. 相似文献
69.
Editors Note: This commentary touches on an aspect of technology transfer to the Third World that often is neglected: Can
the technology recipients afford to use it? Although the authors focus on the economics of shrimp production by subsistence
farmers, affordability is one of the major concomitant issues of transfer from developed to developing countries. 相似文献
70.
D M Fox 《Journal of health politics, policy and law》1990,15(2):341-355
HIV infection is now perceived as the end stage of a chronic disease that is spreading most rapidly among blacks and Hispanics. The politics of the HIV epidemic in the 1980s were dominated by four interacting factors: fear and fascination; who had the disease and to whom it seemed to be spreading; the endemic problems of United States social policy; and the impact on policy of advances in scientific knowledge. This paper analyzes the political history of each of these factors and describes the dominant policies of the federal government and the states regarding HIV in the areas of surveillance, prevention, research, and financing. Four uncertainties will have a profound influence on the future politics of the HIV epidemic: how the states and the federal government will address the general problems of paying for the care of people with chronic diseases and providing access to care for the uninsured and the underinsured; the number and distribution of the sexual behaviors that transmit infection with HIV and the effectiveness of policies to persuade people to modify these behaviors; precisely who uses addictive drugs and the effectiveness of measures to change their behavior; and the natural history of the virus. 相似文献