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   4218203篇
  免费   340556篇
  国内免费   13851篇
耳鼻咽喉   58848篇
儿科学   135064篇
妇产科学   110598篇
基础医学   651999篇
口腔科学   113562篇
临床医学   383606篇
内科学   761573篇
皮肤病学   106071篇
神经病学   350781篇
特种医学   163965篇
外国民族医学   503篇
外科学   648071篇
综合类   119441篇
现状与发展   23篇
一般理论   2583篇
预防医学   354069篇
眼科学   99056篇
药学   295137篇
  26篇
中国医学   11307篇
肿瘤学   206327篇
  2021年   55889篇
  2020年   35606篇
  2019年   58532篇
  2018年   73899篇
  2017年   56440篇
  2016年   62466篇
  2015年   75471篇
  2014年   109847篇
  2013年   175065篇
  2012年   121684篇
  2011年   127217篇
  2010年   125533篇
  2009年   126769篇
  2008年   113265篇
  2007年   120672篇
  2006年   129316篇
  2005年   124411篇
  2004年   124683篇
  2003年   114948篇
  2002年   104132篇
  2001年   149821篇
  2000年   144741篇
  1999年   134442篇
  1998年   70128篇
  1997年   66245篇
  1996年   64452篇
  1995年   59714篇
  1994年   53803篇
  1993年   50069篇
  1992年   96165篇
  1991年   92733篇
  1990年   89155篇
  1989年   86909篇
  1988年   80130篇
  1987年   78610篇
  1986年   73963篇
  1985年   73056篇
  1984年   61719篇
  1983年   55489篇
  1982年   46042篇
  1981年   43140篇
  1980年   40530篇
  1979年   53185篇
  1978年   44079篇
  1977年   38914篇
  1976年   36301篇
  1975年   36314篇
  1974年   39451篇
  1973年   37672篇
  1972年   35276篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
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   
83.
84.
85.
86.
87.
88.
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   

89.
90.
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