首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   2893783篇
  免费   216401篇
  国内免费   6368篇
耳鼻咽喉   38438篇
儿科学   95194篇
妇产科学   79052篇
基础医学   410780篇
口腔科学   82265篇
临床医学   261206篇
内科学   570240篇
皮肤病学   66941篇
神经病学   232678篇
特种医学   107762篇
外国民族医学   774篇
外科学   432156篇
综合类   64633篇
现状与发展   7篇
一般理论   1000篇
预防医学   225368篇
眼科学   67321篇
药学   209046篇
  7篇
中国医学   7131篇
肿瘤学   164553篇
  2021年   23599篇
  2019年   24905篇
  2018年   36818篇
  2017年   27413篇
  2016年   30128篇
  2015年   33928篇
  2014年   46225篇
  2013年   69003篇
  2012年   97338篇
  2011年   102520篇
  2010年   59248篇
  2009年   54690篇
  2008年   93974篇
  2007年   99779篇
  2006年   99812篇
  2005年   96263篇
  2004年   92346篇
  2003年   87746篇
  2002年   84341篇
  2001年   141509篇
  2000年   145167篇
  1999年   120363篇
  1998年   32908篇
  1997年   29028篇
  1996年   29062篇
  1995年   27775篇
  1994年   25348篇
  1993年   23574篇
  1992年   91410篇
  1991年   87635篇
  1990年   84306篇
  1989年   80903篇
  1988年   74192篇
  1987年   72440篇
  1986年   67915篇
  1985年   64602篇
  1984年   48270篇
  1983年   40853篇
  1982年   23837篇
  1979年   42592篇
  1978年   29667篇
  1977年   25017篇
  1976年   23468篇
  1975年   24507篇
  1974年   29704篇
  1973年   28696篇
  1972年   26697篇
  1971年   24541篇
  1970年   23138篇
  1969年   21666篇
排序方式: 共有10000条查询结果,搜索用时 140 毫秒
41.
42.
BackgroundThe aim of this study was to estimate the prevalence of dental prosthetic treatment and to investigate the demographic, social, economic and medical factors associated with the use of fixed and removable dentures in a representative sample of adults living in France.MethodsThe data were obtained from the 2002–2003 Decennial Health Survey, a cross-sectional study of a representative sample of the population living in France, which included 29,679 adults. Information was collected by interview. The variables collected were fixed denture, removable denture, age, gender, number of children, area of residence, nationality, educational attainment, family social status, employment status, annual household income per capita, supplementary insurance, chronic disease, eyesight problems/glasses, hearing problems/hearing aids. Multinomial logistic regression models were used to study the relationship between prosthetic treatment and demographic, socioeconomic and medical characteristics unadjusted, adjusted for age and adjusted for all the characteristics.ResultsThe prevalence of prosthetic treatment was 34.6% (95% confidence interval (CI): [34.1; 35.2]) for fixed prosthetic dentures and 13.8% (95% CI: [13.4; 14.2]) for removable prosthetic dentures. We showed a gradient between educational attainment and removable dentures; the odds ratio adjusted for all the variables (aOR) associated with no or primary education compared to post-secondary education was 2.56; 95% CI: [2.09; 3.13]. When annual household income per capita was low, subjects were less likely to report fixed dentures (aOR = 0.68; 95% CI: [0.62; 0.75]) than those with high annual household income per capita. Individuals without insurance less often reported fixed dentures than those with private insurance. Those reporting chronic disease were less likely to report fixed dentures (aOR = 0.87; 95% CI: [0.79; 0.95]) but more likely to report removable dentures (aOR = 1.29; 95% CI: [1.17; 1.43]) than those without chronic disease.ConclusionThis study reveals social, economic and medical inequalities in fixed and removable prosthetic treatment among adults in France.  相似文献   
43.
44.
ABSTRACT

This project examined 55 picture books featuring transgender, gender expansive or genderqueer protagonists or narrators published between 2008 and 2018. The purpose of the study was to determine how this genre of children’s literature supports and challenges four gender assumptions: the gender binary, gender essentialism, sex/gender congruency and gender stability. Additionally, this critical analysis explored misgendering within this genre and themes of social rejection and acceptance. Protagonists and narrators were permitted a degree of gender nonconformity, however, the majority of picture books missed opportunities for a more complete exploration of gender possibilities.  相似文献   
45.
46.
47.
48.
49.
50.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号