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   4700367篇
  免费   357427篇
  国内免费   14618篇
耳鼻咽喉   66074篇
儿科学   146623篇
妇产科学   123576篇
基础医学   711036篇
口腔科学   130386篇
临床医学   425884篇
内科学   851825篇
皮肤病学   114231篇
神经病学   385426篇
特种医学   182401篇
外国民族医学   571篇
外科学   723144篇
综合类   129880篇
现状与发展   23篇
一般理论   2683篇
预防医学   385672篇
眼科学   111407篇
药学   333730篇
  28篇
中国医学   12495篇
肿瘤学   235317篇
  2021年   56068篇
  2019年   58697篇
  2018年   74707篇
  2017年   57140篇
  2016年   63343篇
  2015年   76065篇
  2014年   110515篇
  2013年   175762篇
  2012年   131289篇
  2011年   138362篇
  2010年   128397篇
  2009年   128750篇
  2008年   125156篇
  2007年   133934篇
  2006年   142285篇
  2005年   137206篇
  2004年   137252篇
  2003年   127455篇
  2002年   116754篇
  2001年   180843篇
  2000年   177075篇
  1999年   160830篇
  1998年   73327篇
  1997年   68460篇
  1996年   66637篇
  1995年   61894篇
  1994年   55854篇
  1993年   51866篇
  1992年   117215篇
  1991年   113072篇
  1990年   109073篇
  1989年   106338篇
  1988年   97823篇
  1987年   96035篇
  1986年   90191篇
  1985年   88864篇
  1984年   72455篇
  1983年   64440篇
  1982年   49463篇
  1981年   46011篇
  1980年   43134篇
  1979年   63108篇
  1978年   50180篇
  1977年   44279篇
  1976年   40909篇
  1975年   41719篇
  1974年   46379篇
  1973年   44214篇
  1972年   41543篇
  1971年   38874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