全文获取类型
收费全文 | 17211篇 |
免费 | 275篇 |
专业分类
各国政治 | 681篇 |
工人农民 | 1476篇 |
世界政治 | 703篇 |
外交国际关系 | 560篇 |
法律 | 10273篇 |
中国共产党 | 3篇 |
中国政治 | 63篇 |
政治理论 | 3647篇 |
综合类 | 80篇 |
出版年
2020年 | 118篇 |
2019年 | 150篇 |
2018年 | 1439篇 |
2017年 | 1380篇 |
2016年 | 1209篇 |
2015年 | 217篇 |
2014年 | 176篇 |
2013年 | 1056篇 |
2012年 | 419篇 |
2011年 | 1125篇 |
2010年 | 1169篇 |
2009年 | 773篇 |
2008年 | 972篇 |
2007年 | 906篇 |
2006年 | 275篇 |
2005年 | 299篇 |
2004年 | 416篇 |
2003年 | 356篇 |
2002年 | 248篇 |
2001年 | 276篇 |
2000年 | 281篇 |
1999年 | 202篇 |
1998年 | 137篇 |
1997年 | 142篇 |
1996年 | 138篇 |
1995年 | 133篇 |
1994年 | 126篇 |
1993年 | 124篇 |
1992年 | 195篇 |
1991年 | 212篇 |
1990年 | 194篇 |
1989年 | 186篇 |
1988年 | 172篇 |
1987年 | 181篇 |
1986年 | 176篇 |
1985年 | 171篇 |
1984年 | 172篇 |
1983年 | 179篇 |
1982年 | 105篇 |
1981年 | 92篇 |
1980年 | 81篇 |
1979年 | 116篇 |
1978年 | 84篇 |
1977年 | 83篇 |
1976年 | 61篇 |
1975年 | 63篇 |
1974年 | 64篇 |
1973年 | 73篇 |
1972年 | 65篇 |
1968年 | 53篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
981.
A method for identifying the group appurtenance of biological objects from subjects suffering from various diseases is developed. The method can be used in examination of putrefactive objects (blood, secretions, hair, etc.) and in cases when the group appurtenance cannot be identified by other methods. 相似文献
982.
A modification of quantitative absorption and absorption elution tests with blood stain washing before the absorption phase is presented. Due to washing, the effect of carrier object on anti-Le(a) and anti-Le(b) sera is decreased and the sensitivity of the method is increased. Additional adsorption of the sera and elution into test erythrocytes treated with protease C is suggested for increasing the number of standard sera fit for the absorption-elution test. A new technology for preparing anti-Le(a) and anti-Le(b) immunoreagents is described. 相似文献
983.
984.
Petra M. van de Looij-Jansen Judith E. J. Goldschmeding Erik Jan de Wilde 《Journal of youth and adolescence》2006,35(4):652-658
Self-report questionnaires are frequently used in youth research, but doubt remains whether total anonymity affects the results. This study compared the responses of 704 mainly 16–17-year-old adolescents to self-report measures of various health indicators in 2 groups: anonymous and confidential collection. For most health indicators no significant differences were found. Perceived health, use of alcohol, and aggressive behavior (for boys) were reported significantly less frequently in the confidential group (small effect size). It appeared that pupils with high scores on social desirability do not respond differently at most health indicators in the 2 conditions. For most health characteristics, epidemiologically useful outcomes may be derived from confidential self-report measures, which are also valuable for detecting individual at-risk children. Similar studies in lower grades and other types of education should confirm the results.Youth Department, Municipal Health Service Rotterdam area. Main research interests are emotional and behavioral problems of adolescents, youth health care, monitoring.Youth Department, Municipal Health Service Rotterdam area. Main research interests are emotional and behavioral problems of adolescents, youth health care, monitoring.Research Department, Municipal Health Service Rotterdam area. Major research interests include emotional and behavioral problems of adolescents, suicidal behavior, youth health care, monitoring. 相似文献
985.
Christie J. Rizzo Shannon E. Daley Brent H. Gunderson 《Journal of youth and adolescence》2006,35(3):444-453
The role of interpersonal sensitivity in the relation between romantic stress and depression was examined in 55 adolescent girls from an inner-city high school. Depression, interpersonal sensitivity, and chronic and episodic romantic stress were measured at two time points, 6 months apart. Interpersonal sensitivity was found to moderate the longitudinal relation between romantic stress (both chronic and episodic) and depression. In contrast, interpersonal sensitivity did not potentiate depressive responses to non-romantic interpersonal stress, suggesting particular importance of stress in the romantic domain for adolescent girls. Results indicate that girls' sensitivities to romantic relationship stress should be specifically addressed in depression prevention and intervention programs.Received her PhD from the University of Southern California. Research interests include the influence of romantic relationship factors, such as romantic stress and dating violence, on the development of depression during adolescence.Received her PhD from the University of California, Los Angeles. Research interests include the interplay between adolescent depression, personality disorder symptoms, and interpersonal variables including adjustment in friendships and romantic relationships.Research interests include cognitive and interpersonal factors in adolescent depression. 相似文献
986.
987.
Kent E. Calder 《East Asia》2006,23(3):49-66
Already the world’s second largest energy consumer, China has accounted for more than a third of the increase in global oil
demand since 2000. Due to infrastructural bottlenecks as well as supply shortages, intensified by sustained growth, the PRC
is likely to become an increasingly important factor in global oil and gas markets, and to pursue an increasingly active energy
diplomacy. Reducing energy vulnerability will be a key imperative. The PRC is striving to reduce its energy vulnerability
by: (1) promoting energy efficiency; (2) diversifying away from its heavy reliance on coal and oil, toward nuclear power and
natural gas; (3) improving domestic energy infrastructure; (4) promoting national energy champions; (5) deepening reliance
on congenial nations; and (6) reducing reliance on sea lanes dominated by the U.S. Navy. Kazakhstan, Iran, Russia, Venezuela,
Australia, and African energy producers are special priority targets of its energy diplomacy, which is likely to become more
salient in China's overall foreign policy in coming years. 相似文献
988.
989.
Nancy Darling Patricio Cumsille Linda L. Caldwell Bonnie Dowdy 《Journal of youth and adolescence》2006,35(4):659-670
Adolescents’ willingness to share information with parents is a central process through which parents gain knowledge of their adolescents’ lives. This paper addresses four questions important to understanding adolescents’ decisions to voluntarily disclose areas of parent-adolescent disagreement: What are the contribution of parent-adolescent agreement and adolescents’ non-disclosure of disagreement to adolescents’ perceptions of parental knowledge?; Which adolescents are most likely to disclose to parents in case of disagreement?; Under what conditions are adolescents more or less likely to disclose disagreement?; and What type of non-disclosure will different adolescents use and under what conditions? Self-report data from 120 adolescents (M age=15.8) revealed that failure to disclose disagreement, but not overall agreement, predicted perceived parental knowledge. Adolescents from authoritative homes and those less involved in disapproved leisure were more likely to disclose disagreement and less likely to lie. Within-person differences in disclosure were predicted by the presence of explicit rules and adolescents’ beliefs about required obedience.Dr. Darling is a developmental psychologist whose research focuses on social relationships during adolescence, with a special interest in contextual variation in developmental processes. Correspondence should be addressed to Dr. Darling atDr. Cumsille is a developmental methodologist whose research focuses on adolescent well-being.Dr. Caldwell's research focuses on the experience of adolescent leisure, with a particular interest in adolescent boredom and well-being.Dr. Dowdy is a developmental psychologist specializing in adolescent social relations. 相似文献
990.
Sara E. Davies 《澳大利亚政治与历史杂志》2006,52(4):562-575
The majority of Asian states have not signed onto the major international refugee law instruments which promote refugee recognition and protection. Yet, second to Africa, the Asian region has had the highest number of refugees since the Second World War. Three explanations are usually offered to explain this puzzle —“good neighbourliness”, “economic costs” and “social disruption”. In this article I argue that each is flawed in important ways and then develop an alternative by explaining how limited Asian involvement in the drafting of international refugee law has led Asian states to reject Eurocentric refugee recognition practices. 相似文献