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   2632357篇
  免费   213951篇
  国内免费   4896篇
耳鼻咽喉   35859篇
儿科学   87671篇
妇产科学   74934篇
基础医学   374374篇
口腔科学   75627篇
临床医学   236597篇
内科学   516034篇
皮肤病学   58631篇
神经病学   216123篇
特种医学   103177篇
外国民族医学   897篇
外科学   395702篇
综合类   64818篇
现状与发展   6篇
一般理论   970篇
预防医学   207502篇
眼科学   60911篇
药学   192664篇
  3篇
中国医学   5478篇
肿瘤学   143226篇
  2018年   27469篇
  2017年   21113篇
  2016年   23802篇
  2015年   27039篇
  2014年   37974篇
  2013年   57370篇
  2012年   77531篇
  2011年   81912篇
  2010年   48387篇
  2009年   46237篇
  2008年   77064篇
  2007年   81475篇
  2006年   82734篇
  2005年   80281篇
  2004年   77867篇
  2003年   74450篇
  2002年   72362篇
  2001年   125925篇
  2000年   129542篇
  1999年   108874篇
  1998年   30532篇
  1997年   27642篇
  1996年   27576篇
  1995年   26513篇
  1994年   24526篇
  1993年   23171篇
  1992年   86291篇
  1991年   83177篇
  1990年   80652篇
  1989年   77517篇
  1988年   71848篇
  1987年   70511篇
  1986年   66658篇
  1985年   63913篇
  1984年   48307篇
  1983年   41349篇
  1982年   24741篇
  1981年   22058篇
  1979年   44757篇
  1978年   31283篇
  1977年   26316篇
  1976年   24790篇
  1975年   25754篇
  1974年   31467篇
  1973年   30388篇
  1972年   28071篇
  1971年   26129篇
  1970年   24427篇
  1969年   22760篇
  1968年   21060篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
32.
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   
33.
34.
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   
35.
36.
37.
38.
39.
40.
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