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   2793783篇
  免费   206659篇
  国内免费   4293篇
耳鼻咽喉   38234篇
儿科学   91073篇
妇产科学   74563篇
基础医学   413985篇
口腔科学   77633篇
临床医学   253173篇
内科学   540375篇
皮肤病学   62050篇
神经病学   217985篇
特种医学   104344篇
外国民族医学   552篇
外科学   419179篇
综合类   58324篇
现状与发展   12篇
一般理论   996篇
预防医学   217252篇
眼科学   65458篇
药学   209455篇
  13篇
中国医学   6223篇
肿瘤学   153856篇
  2021年   22448篇
  2019年   22942篇
  2018年   31708篇
  2017年   23947篇
  2016年   26795篇
  2015年   30162篇
  2014年   42477篇
  2013年   63754篇
  2012年   87297篇
  2011年   92452篇
  2010年   54997篇
  2009年   51982篇
  2008年   86862篇
  2007年   92632篇
  2006年   93644篇
  2005年   90370篇
  2004年   86775篇
  2003年   83239篇
  2002年   80860篇
  2001年   129759篇
  2000年   133019篇
  1999年   111564篇
  1998年   32016篇
  1997年   27941篇
  1996年   28336篇
  1995年   26858篇
  1994年   24707篇
  1993年   23242篇
  1992年   86219篇
  1991年   84180篇
  1990年   81963篇
  1989年   79384篇
  1988年   72973篇
  1987年   71517篇
  1986年   67106篇
  1985年   64037篇
  1984年   47618篇
  1983年   40422篇
  1982年   23799篇
  1979年   43735篇
  1978年   31130篇
  1977年   25979篇
  1976年   24866篇
  1975年   26767篇
  1974年   32019篇
  1973年   30551篇
  1972年   28652篇
  1971年   27020篇
  1970年   25224篇
  1969年   23821篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
Troppmair  Teresa  Egger  J.  Krösbacher  A.  Zanvettor  A.  Schinnerl  A.  Neumayr  A.  Baubin  M. 《Der Anaesthesist》2022,71(4):272-280
Die Anaesthesiologie - Die Qualität eines Rettungssystems zeichnet sich auch durch den effizienten Einsatz seiner personellen und Fahrzeugressourcen aus. So können im berechtigten Fall...  相似文献   
32.
33.
34.
35.
MicroRNAs (miRNAs) play important roles in prostate cancer development. However, it remains unclear how individual miRNAs contribute to the initiation and progression of prostate cancer. Here we show that a basal layer‐enriched miRNA is required for prostate tumorigenesis. We identify miR‐205 as the most highly expressed miRNA and enriched in the basal cells of the prostate. Although miR‐205 is not required for normal prostate development and homeostasis, genetic deletion of miR‐205 in a Pten null tumor model significantly compromises tumor progression and does not promote metastasis. In Pten null basal cells, loss of miR‐205 attenuates pAkt levels and promotes cellular senescence. Furthermore, although overexpression of miR‐205 in prostate cancer cells with luminal phenotypes inhibits cell growth in both human and mouse, miR‐205 has a minimal effect on the growth of a normal human prostate cell line. Taken together, we have provided genetic evidence for a requirement of miR‐205 in the progression of Pten null‐induced prostate cancer.  相似文献   
36.
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   
37.
38.
39.
40.
Graefe's Archive for Clinical and Experimental Ophthalmology - The published online version contains mistake as the author's first name and last name have been interchanged as "Hild...  相似文献   
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