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   4680389篇
  免费   357223篇
  国内免费   15339篇
耳鼻咽喉   65284篇
儿科学   150129篇
妇产科学   123099篇
基础医学   709340篇
口腔科学   128185篇
临床医学   428878篇
内科学   849291篇
皮肤病学   114313篇
神经病学   389630篇
特种医学   181268篇
外国民族医学   816篇
外科学   702629篇
综合类   130118篇
现状与发展   24篇
一般理论   2704篇
预防医学   386505篇
眼科学   110033篇
药学   331905篇
  27篇
中国医学   13285篇
肿瘤学   235488篇
  2021年   56712篇
  2019年   59211篇
  2018年   75490篇
  2017年   57931篇
  2016年   64101篇
  2015年   76838篇
  2014年   111119篇
  2013年   176691篇
  2012年   132767篇
  2011年   139374篇
  2010年   128921篇
  2009年   129413篇
  2008年   125148篇
  2007年   133858篇
  2006年   141833篇
  2005年   135700篇
  2004年   136883篇
  2003年   126786篇
  2002年   116026篇
  2001年   183617篇
  2000年   179449篇
  1999年   162579篇
  1998年   73797篇
  1997年   68981篇
  1996年   66967篇
  1995年   62356篇
  1994年   56300篇
  1993年   52179篇
  1992年   117802篇
  1991年   113065篇
  1990年   108887篇
  1989年   106313篇
  1988年   97728篇
  1987年   95659篇
  1986年   90044篇
  1985年   87779篇
  1984年   71994篇
  1983年   63686篇
  1982年   49355篇
  1981年   45739篇
  1980年   42903篇
  1979年   61755篇
  1978年   49115篇
  1977年   43569篇
  1976年   40384篇
  1975年   41092篇
  1974年   44929篇
  1973年   42811篇
  1972年   40137篇
  1971年   37153篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
3.
4.
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   
5.
6.
7.
8.
Background: Traumatic brain injury (TBI) results in verbal recall deficits and impaired processing of emotion encoded in facial appearance, prosody and the linguistic content of messages. Emotion facilitates memory (emotional memory advantage) for non-brain injured (NBI) individuals but the impact of emotion on verbal recall for linguistically encoded stimuli in TBI has not been explored.

Aims: The purpose of this study was to determine the effects of stimulus emotional content on verbal recall of words and paragraphs in TBI compared to NBI individuals.

Methods and procedures: Six 10-item lists, each with five emotional and five neutral words, and six paragraphs (three emotional, three neutral) were counterbalanced and presented in random order to 20 individuals with TBI and 44 NBI. The number of words from lists and the number of content units from paragraphs were compared for the two groups.

Outcomes and results: The NBI participants recalled more words from the lists and content units from the paragraphs than the individuals with TBI. Both groups recalled significantly more emotional than neutral words. NBI but not TBI participants had significantly greater recall for information in paragraphs with emotional content.

Conclusions: Participants with TBI showed impaired recall of words and paragraph content. Emotion facilitated word and paragraph content recall for neurotypical individuals but emotional memory advantage was limited to words for the TBI participants.  相似文献   

9.
10.
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