全文获取类型
收费全文 | 813篇 |
免费 | 20篇 |
专业分类
各国政治 | 20篇 |
工人农民 | 86篇 |
世界政治 | 65篇 |
外交国际关系 | 27篇 |
法律 | 388篇 |
中国政治 | 16篇 |
政治理论 | 214篇 |
综合类 | 17篇 |
出版年
2022年 | 7篇 |
2021年 | 2篇 |
2020年 | 11篇 |
2019年 | 11篇 |
2018年 | 18篇 |
2017年 | 13篇 |
2016年 | 25篇 |
2015年 | 17篇 |
2014年 | 19篇 |
2013年 | 106篇 |
2012年 | 33篇 |
2011年 | 25篇 |
2010年 | 24篇 |
2009年 | 11篇 |
2008年 | 32篇 |
2007年 | 35篇 |
2006年 | 37篇 |
2005年 | 42篇 |
2004年 | 35篇 |
2003年 | 29篇 |
2002年 | 31篇 |
2001年 | 18篇 |
2000年 | 18篇 |
1999年 | 10篇 |
1998年 | 13篇 |
1997年 | 6篇 |
1996年 | 5篇 |
1995年 | 10篇 |
1994年 | 11篇 |
1993年 | 10篇 |
1992年 | 12篇 |
1991年 | 15篇 |
1990年 | 13篇 |
1989年 | 9篇 |
1988年 | 20篇 |
1987年 | 12篇 |
1986年 | 12篇 |
1985年 | 8篇 |
1984年 | 5篇 |
1983年 | 4篇 |
1982年 | 7篇 |
1981年 | 5篇 |
1980年 | 7篇 |
1979年 | 7篇 |
1978年 | 6篇 |
1977年 | 4篇 |
1976年 | 4篇 |
1975年 | 6篇 |
1974年 | 3篇 |
1973年 | 2篇 |
排序方式: 共有833条查询结果,搜索用时 812 毫秒
151.
Anja Sasso D.D.S. Ph.D. Stjepan Špalj D.D.S. Ph.D. Barbara Mady Maričić D.D.S. Ph.D. Antun Sasso M.D. Ph.D. Tomislav Ćabov D.D.S. Ph.D. Mario Legović D.D.S. Ph.D. 《Journal of forensic sciences》2013,58(3):673-677
The study evaluated secular trends in dental development during a period of 30 years, correlation between dental and chronological age in Istria and the littoral region of Croatia. The sample consisted of 1000 panoramic radiographs of children, aged 6–16 years (mean 10.0 ± 1.8), taken in the period 1977–1979 (N = 500; 243 females) and 2007–2009 (N = 500; 299 females). Dental age was assessed according to Demirjian's method. Correlation between chronological and dental age was linear, positive, high, and statistically significant in both periods and genders, ranging from 0.73 to 0.86. Dental age was underestimated when compared to chronological age by 1 year on average, more 30 years ago (?1.35 ± 1.17) than today (?0.63 ± 1.09), less for girls (?0.80 ± 1.22) than boys (?1.21 ± 1.10). A statistically significant positive secular trend in acceleration of dental development was present of 0.72 years during the 30‐year period and was more significant in girls than boys (0.83‐ and 0.51‐year acceleration). 相似文献
152.
Douglas D. Perkins Courtney Larsen Barbara B. Brown 《Journal of prevention & intervention in the community》2013,41(1):48-65
This longitudinal, multimethod study uses geographical information system (GIS) software to evaluate the community-wide impact of a neighborhood revitalization project. Unsystematic visual examination and analysis of GIS maps are offered as a complementary tool to quantitative analysis and one that is much more compelling, meaningful, and effective in presentation to community and nonscientific professional audiences. The centerpiece of the intervention was the development of a new, middle-class housing subdivision in an area that was declining physically and economically. This represents three major urban/housing policy directions: (1) the emphasis on home ownership for working-class families, (2) the deconcentration of poverty through development of mixed-income neighborhoods, and (3) the clean up and redevelopment of contaminated, former industrial brownfields. Resident survey responses, objective environmental assessment observations, and building permit data were collected, geocoded at the address level, and aggregated to the block level on 60 street blocks in the older neighborhoods surrounding the new housing in two waves: during site clearing and housing construction (Time 1: 1993–95) and three years post-completion (Time 2: 1998–99). Variables mapped include (a) Time 1–2 change in self-reported home repairs and improvements, (b) change in the assessed physical condition of yards and exteriors of 925 individual residential properties, (c) change in residents' home pride, and (d) a city archive of building permits at Time 2. Physical conditions improved overall in the neighborhood, but spatial analysis of the maps suggest that the spillover effects, if any, of the new housing were geographically limited and included unintended negative psychological consequences. Results argue for greater use of GIS and the street block level in community research and of psychological and behavioral variables in planning research and decisions. 相似文献
153.
Robert M. Wiedenhaefer Barbara Riederer Dastoor Joseph Balloun Josephine Sosa-Fey 《冲突和恐怖主义研究》2013,36(9):801-823
Most of the world's terrorism occurs in but a few of the world's countries. This study examines why. The extent to which Hofstede's cultural values relate to terrorism in the 1970s in 51 countries is analyzed. Uncertainty avoidance emerges as the single cultural value that is related to terrorism. Uncertainty avoidance, related to stress, may provide important prerequisites for group-induced aberrant behavior when formerly alienated group members find comfort in adhering to a collective belief system where dissent is discouraged, a sense of group purpose is reinforced, and rules are strictly imposed—apparently confirming the writings of terrorism psychologists. 相似文献
154.
155.
Barbara Ann Rieffer-Flanagan 《Human Rights Review》2014,15(4):433-454
This paper examines the Obama Administration’s approach to democracy promotion in Egypt. After a brief discussion of the motivation for promoting democracy, this essay compares the Obama Administration to its predecessor and analyzes the changes that were spurred by the Arab Awakening. Did the Obama Administration, during and after the 2011 Revolution, fully support democratic change in Egypt not only with rhetoric but also with the financial and programmatic support necessary to help a transitioning country? Did the Obama Administration offer a consistent message on the importance of democratic policies? Or did the administration allow other policy objectives to trump democratic efforts? This paper explores the language, policies, and funding employed by the Obama Administration in Egypt to see what the impact has been. 相似文献
156.
157.
Adolescent Self-Esteem and Gender: Exploring Relations to Sexual Harassment, Body Image, Media Influence, and Emotional Expression 总被引:5,自引:0,他引:5
Mary Polce-Lynch Barbara J. Myers Wendy Kliewer Christopher Kilmartin 《Journal of youth and adolescence》2001,30(2):225-244
Self-esteem plays a central role in mental health, yet not enough is known about how youth evaluate themselves as they move across adolescence. This study used a cross-sectional design to examine age and gender patterns in self-esteem and to explore how contemporary social influences relate to adolescent self-esteem. Self-reported influences on self-esteem involving the media, sexual harassment, body image, family and peer relationships, and emotional expression were evaluated with 93 boys and 116 girls in Grades 5, 8, and 12. Girls reported lower self-esteem than boys in early adolescence, and late adolescent boys reported lower self-esteem than younger boys. The predictors as a set accounted for a significant portion of the variance in self-esteem, while the best predictor of self-esteem varied by age and gender. Large gender differences were present for emotional expression, with boys becoming more restrictive across adolescence. Girls reported more negative body image and media influence scores than did boys in late childhood and early adolescence. Body image appeared to mediate the relationships between certain predictors and self-esteem for girls, while gender and grade appeared to moderate the relationship between media influence and self-esteem for girls and boys. 相似文献
158.
159.
Barbara Bornet Stumph 《北京周报(英文版)》2013,56(13):48
We are beginning our trip on the Silk Road near Urumqi, northwest China’s Xinjiang Uygur Autonomous Region. If you picture the map of China, you will see a rooster with the beak. We are touring the rooster’s tail area. Our Uygur guide Kalim, says, "Today we’ll visit a Kazakyurtifwecanfindone." There are no yurts-round-like and portable dwellings-in sight here, just small stucco 相似文献
160.