全文获取类型
收费全文 | 24247篇 |
免费 | 741篇 |
国内免费 | 5篇 |
专业分类
各国政治 | 1228篇 |
工人农民 | 1048篇 |
世界政治 | 1743篇 |
外交国际关系 | 898篇 |
法律 | 14797篇 |
中国共产党 | 8篇 |
中国政治 | 292篇 |
政治理论 | 4724篇 |
综合类 | 255篇 |
出版年
2020年 | 318篇 |
2019年 | 394篇 |
2018年 | 497篇 |
2017年 | 594篇 |
2016年 | 591篇 |
2015年 | 450篇 |
2014年 | 479篇 |
2013年 | 2516篇 |
2012年 | 650篇 |
2011年 | 761篇 |
2010年 | 586篇 |
2009年 | 610篇 |
2008年 | 691篇 |
2007年 | 721篇 |
2006年 | 706篇 |
2005年 | 629篇 |
2004年 | 633篇 |
2003年 | 693篇 |
2002年 | 567篇 |
2001年 | 938篇 |
2000年 | 813篇 |
1999年 | 712篇 |
1998年 | 379篇 |
1997年 | 262篇 |
1996年 | 301篇 |
1995年 | 263篇 |
1994年 | 295篇 |
1993年 | 287篇 |
1992年 | 457篇 |
1991年 | 481篇 |
1990年 | 461篇 |
1989年 | 396篇 |
1988年 | 459篇 |
1987年 | 404篇 |
1986年 | 446篇 |
1985年 | 412篇 |
1984年 | 363篇 |
1983年 | 348篇 |
1982年 | 254篇 |
1981年 | 249篇 |
1980年 | 214篇 |
1979年 | 254篇 |
1978年 | 191篇 |
1977年 | 172篇 |
1976年 | 159篇 |
1975年 | 172篇 |
1974年 | 175篇 |
1973年 | 147篇 |
1972年 | 148篇 |
1969年 | 145篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
881.
Karen A. Hegtvedt 《Social Justice Research》1992,5(2):155-172
In many types of social situations, individuals defend their claims to a portion of the rewards by arguing that they are just. Although a great deal of research demonstrates that individuals differ in their distribution preferences and thus their beliefs about what is fair, the literature curiously omits consideration of the consequences of these differences, especially the conflict they may engender. This paper first reviews the few attempts to address such justice conflict. The limitations of these approaches suggest concerns to be addressed in an alternative framework. The paper presents a theoretical discussion of this alternative that integrates assumptions about distribution preferences, justice beliefs, conditions fostering the emergence of justice conflict, and elements of negotiation processes as a basic framework for predictions about the bargaining strategies individuals may employ to resolve competing justice claims. 相似文献
882.
883.
884.
Effects of positional restraint on oxygen saturation and heart rate following exercise 总被引:1,自引:0,他引:1
D T Reay J D Howard C L Fligner R J Ward 《The American journal of forensic medicine and pathology》1988,9(1):16-18
This report assesses the effects on peripheral oxygen saturation and heart rate that positional restraint induces when a person is prone, handcuffed, and "hog-tied." Peripheral oxygen saturation and heart rate were monitored at rest, during exercise, and during recovery from exercise for 10 adult subjects. The effects of positional restraint produced a mean recovery time that was significantly prolonged. Consequently, the physiological effects produced by positional restraint should be recognized in deaths where such measures are used. 相似文献
885.
The necessity of rapid objective appraisal of the suspicion of intracorporeal drug smuggling (body-packing) by effective methods of investigation in the course of the first criminal investigation department measures raises the questions of suitable and admissible methods. The proportion of undetected crimes in intracorporeal narcotic smuggling must be rated as very high according to the data of the Federal Criminal Investigation Department. In the present paper, the suitability of various imaging techniques for drug detection are reported in terms of their risk, practicability and costs. For this purpose, the value of digital radiography, two-spectra radiography and X-ray computer tomography as compared to conventional X-ray investigations is examined in human experiments. A reality-oriented narcotics dummy (glucose pressed hard in preservative) was developed and administered to nine volunteers per os with a variable initial alimentary situation. Four radiograms were taken at fixed times up to 12 hours after administration with each imaging technique. The highest rate of detection was attained with computer tomography. In contrast to the other methods, more than 90% of the body packs could be identified here. Nevertheless, an application in criminal investigation practice cannot be recommended owing to various disadvantages. The recovery rate of the remaining methods is between 20% and 25%. 相似文献
886.
Claudio A. Holzner 《拉美政治与社会》2007,49(2):87-122
Twenty years after governments across Latin America began implementing neoliberal reforms in earnest, concern is growing about their impact on the quality of democracy in the region. This article examines this issue in the case of Mexico by exploring how patterns of political participation, especially among the rural and urban poor, have changed since the implementation of free market reforms. It asks whether the institutional innovations associated with free market reforms make it easier or more difficult for the poor to participate in Mexico's political process. The answer is not encouraging. Despite democratic openings, the new linkages between the state and citizens established as a result of the transition to a free market development model stifle the voice of the poor not through the threat of force or coercion, but by creating obstacles and disincentives for political mobilization that affect the poor more severely than other groups. 相似文献
887.
Christopher A. Thurber Marge M. Scanlin Leslie Scheuler Karla A. Henderson 《Journal of youth and adolescence》2007,36(3):241-254
Three thousand, three hundred and ninety-five families, whose child attended one of 80 different day or resident summer camps
for at least one week, completed customized questionnaires that measured growth from precamp to postcamp in four domains:
Positive Identity, Social Skills, Physical & Thinking Skills, and Positive Values & Spirituality. Parents, children, and camp
staff reported significant positive change in these four domains; more than would be expected by maturation alone. Most gains
were maintained or showed additional growth six months later. Few of the camp's structural elements correlated with growth,
nor did striking gender, age, or ethnicity differences emerge. The study highlights the particular strengths of camp as an
educational institution and social movement and suggests that different variations of summer camp can provide potent developmental
experiences.
Christopher A. Thurber is full-time faculty at Phillips Exeter Academy in Exeter, New
Hampshire. He received his PhD in clinical psychology from the University of California, Los
Angeles, in 1997. His major research interests include homesickness, youth camping, and
developmental psychopathology.
Margery M. Scanlin is the Executive Officer for Research at the American Camp Association in
Martinsville, Indiana. She received her EdD from Temple University in Philadelphia, PA, in
1982. Her major research interests include youth development outcomes, program improvement
in youth organizations, and organizational aspects of effective camps.
Leslie Scheuler Whitaker is a Senior Associate with Philliber Research Associates in St. Louis,
Missouri. She received her PhD in social science research from Washington University in St.
Louis in 2000. Her primary research areas include youth development, arts education, and
program evaluation.
Karla A. Henderson is a professor in the Department of Parks, Recreation, and Tourism at North
Carolina State University. She received her PhD in education from the University of Minnesota
in 1979 and is currently a member of the American Camp Association Board of Directors. Her
research interests include leisure behavior theory, camping and outdoor education, and gender
and diversity issues. 相似文献
888.
Marvella A. Bowman Hazel M. Prelow Scott R. Weaver 《Journal of youth and adolescence》2007,36(4):517-527
The aim of the present study was to examine a model positing that association with deviant peers mediates the relation between
adolescent perceived parenting behaviors (maternal monitoring and involvement), the interaction of these parenting behaviors,
and delinquency in a sample of 135 urban African American adolescents (13–19 years of age). Regression analyses revealed a
monitoring by involvement interaction among African American females, suggesting that maternal monitoring may effectively
reduce delinquency among African American female adolescents, and that this reduction may be enhanced by increased maternal
involvement. Among African American males, only the relation between association with deviant peers and delinquency was supported,
suggesting that maternal parenting behaviors may, in isolation, be insufficient in the prevention of delinquent behaviors
in African American male adolescents. The results suggest that the pathways from parenting to association with deviant peers
and delinquency may differ in males and females, and the salience of certain parenting behaviors may differ across gender.
This article is based on research that was submitted by the first author in partial fulfillment of the requirements of the
master’s degree in psychology at the University at Albany, State University of New York. Support for this research was provided
by a Faculty Research Award to the second author.
Doctoral student in the Clinical Psychology Program at the University at Albany, State University of New York. Her major research
interests include risk and resiliency processes in minority youth and measurement equivalence of risk and resiliency constructs.
Assistant professor in the Department of Psychology at the University at Albany, State University of New York. She received
her Ph.D. in Clinical Psychology from the University of North Texas. Her major research interests are ecocultural models of
risk and resiliency in minority youth and measurement equivalence of risk and resiliency constructs.
Post-doctoral fellow with the Prevention Research Center at Arizona State University. He received his Ph.D. in Clinical Psychology
from the University at Albany, State University of New York. His major research interests are ecocultural models of risk and
resiliency in children, preventive intervention development for diverse children, and quantitative methodology and applications
in developmental and cross-cultural psychology. 相似文献
889.
Michael A. Busseri Teena Willoughby Heather Chalmers 《Journal of youth and adolescence》2007,36(3):279-289
A large volume of research has investigated interrelations among adolescent risk behaviors. Although several theoretical accounts
have been proposed, researchers have not directly examined hypotheses for why risk behaviors are linked. In the present paper, a distinction is drawn between predictive factors that explain variance
in risk behaviors and “linkage factors” which may provide an explanation for why risk behaviors are interrelated. The relevance
of linkage factors to risk behavior research, theory, and practice is described. Further, a simple to use and easy to interpret
analytic technique for exploring linkage-related issues is illustrated. Using this technique, hypotheses regarding the role
of predictors in explaining linkages among risk behaviors can be tested directly. The proposed line of inquiry will provide
valuable input for intervention efforts and theoretically relevant information concerning linkages among adolescent risk behaviors.
Research Associate at the Brock Research Institute for Youth Studies at Brock University, Ontario, Canada. He received his
M.A. in Clinical Psychology from the University of North Dakota. His major research interests are adolescent risk behavior
involvement and youth activity involvement as a context for positive development.
Professor in the Department of Child and Youth Studies at Brock University, Ontario, Canada. She received her Ph.D. in Developmental
Psychology from the University of Waterloo. Her major research interests include adolescent risk taking and resilience, including
academic underachievement and media/technology influences on lifestyle choices and learning.
Assistant Professor in the Department of Child and Youth Studies at Brock University, Ontario, Canada. She received her Ph.D.
in Developmental Psychology from Brock University. Her major research interests are adolescent risk-behavior involvement,
particularly related to gambling, and risk and resilience. 相似文献
890.