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   5469305篇
  免费   413608篇
  国内免费   16757篇
耳鼻咽喉   78252篇
儿科学   173041篇
妇产科学   145691篇
基础医学   805821篇
口腔科学   155688篇
临床医学   505001篇
内科学   997774篇
皮肤病学   125883篇
神经病学   456679篇
特种医学   213810篇
外国民族医学   1455篇
外科学   815963篇
综合类   153445篇
现状与发展   24篇
一般理论   3039篇
预防医学   459864篇
眼科学   130966篇
药学   393252篇
  28篇
中国医学   14113篇
肿瘤学   269881篇
  2021年   57296篇
  2019年   59722篇
  2018年   77440篇
  2017年   59440篇
  2016年   66275篇
  2015年   78195篇
  2014年   113036篇
  2013年   178932篇
  2012年   156228篇
  2011年   166528篇
  2010年   135306篇
  2009年   134164篇
  2008年   151838篇
  2007年   163709篇
  2006年   170281篇
  2005年   164397篇
  2004年   164715篇
  2003年   154189篇
  2002年   143649篇
  2001年   219555篇
  2000年   217969篇
  1999年   194069篇
  1998年   79261篇
  1997年   73116篇
  1996年   70930篇
  1995年   66582篇
  1994年   60582篇
  1993年   55950篇
  1992年   145351篇
  1991年   139875篇
  1990年   134577篇
  1989年   130633篇
  1988年   120920篇
  1987年   118996篇
  1986年   112572篇
  1985年   109412篇
  1984年   87366篇
  1983年   76679篇
  1982年   55193篇
  1981年   50943篇
  1980年   47675篇
  1979年   78473篇
  1978年   60140篇
  1977年   52366篇
  1976年   49025篇
  1975年   49972篇
  1974年   57577篇
  1973年   55237篇
  1972年   51998篇
  1971年   47951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.
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   

8.
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