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   4254998篇
  免费   347811篇
  国内免费   13860篇
耳鼻咽喉   59174篇
儿科学   137193篇
妇产科学   110811篇
基础医学   657497篇
口腔科学   115927篇
临床医学   388920篇
内科学   769480篇
皮肤病学   109107篇
神经病学   355333篇
特种医学   164332篇
外国民族医学   503篇
外科学   653218篇
综合类   119267篇
现状与发展   23篇
一般理论   2595篇
预防医学   355162篇
眼科学   99551篇
药学   297432篇
  26篇
中国医学   12073篇
肿瘤学   209045篇
  2021年   56396篇
  2020年   38136篇
  2019年   64044篇
  2018年   78051篇
  2017年   61261篇
  2016年   67552篇
  2015年   80564篇
  2014年   114760篇
  2013年   180188篇
  2012年   122576篇
  2011年   128047篇
  2010年   129120篇
  2009年   128937篇
  2008年   113655篇
  2007年   120439篇
  2006年   129175篇
  2005年   124286篇
  2004年   124601篇
  2003年   114979篇
  2002年   104213篇
  2001年   150053篇
  2000年   144873篇
  1999年   134430篇
  1998年   70099篇
  1997年   66217篇
  1996年   64426篇
  1995年   59699篇
  1994年   53787篇
  1993年   50054篇
  1992年   96076篇
  1991年   92655篇
  1990年   89072篇
  1989年   86830篇
  1988年   80033篇
  1987年   78525篇
  1986年   73873篇
  1985年   72987篇
  1984年   61673篇
  1983年   55439篇
  1982年   46031篇
  1981年   43124篇
  1980年   40507篇
  1979年   53113篇
  1978年   44049篇
  1977年   38888篇
  1976年   36277篇
  1975年   36282篇
  1974年   39417篇
  1973年   37648篇
  1972年   35251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