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   2372896篇
  免费   187927篇
  国内免费   4644篇
耳鼻咽喉   33349篇
儿科学   80162篇
妇产科学   67056篇
基础医学   337930篇
口腔科学   64616篇
临床医学   212391篇
内科学   470167篇
皮肤病学   53674篇
神经病学   191819篇
特种医学   92383篇
外国民族医学   1056篇
外科学   359778篇
综合类   53966篇
现状与发展   4篇
一般理论   783篇
预防医学   185197篇
眼科学   53792篇
药学   172085篇
  3篇
中国医学   5057篇
肿瘤学   130199篇
  2019年   18299篇
  2018年   26138篇
  2017年   19782篇
  2016年   22126篇
  2015年   24874篇
  2014年   35067篇
  2013年   52776篇
  2012年   72170篇
  2011年   76515篇
  2010年   45366篇
  2009年   43188篇
  2008年   71682篇
  2007年   76300篇
  2006年   76923篇
  2005年   74788篇
  2004年   72163篇
  2003年   69153篇
  2002年   67435篇
  2001年   116676篇
  2000年   120190篇
  1999年   101063篇
  1998年   28225篇
  1997年   25468篇
  1996年   25839篇
  1995年   24549篇
  1994年   22645篇
  1993年   21180篇
  1992年   78053篇
  1991年   75374篇
  1990年   72826篇
  1989年   69456篇
  1988年   63843篇
  1987年   62638篇
  1986年   58505篇
  1985年   55956篇
  1984年   42433篇
  1983年   35772篇
  1982年   21378篇
  1981年   19188篇
  1979年   37797篇
  1978年   26486篇
  1977年   22181篇
  1976年   20887篇
  1975年   22126篇
  1974年   26247篇
  1973年   25335篇
  1972年   23513篇
  1971年   21337篇
  1970年   20263篇
  1969年   18544篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
32.
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   
33.
34.
ABSTRACT

This project examined 55 picture books featuring transgender, gender expansive or genderqueer protagonists or narrators published between 2008 and 2018. The purpose of the study was to determine how this genre of children’s literature supports and challenges four gender assumptions: the gender binary, gender essentialism, sex/gender congruency and gender stability. Additionally, this critical analysis explored misgendering within this genre and themes of social rejection and acceptance. Protagonists and narrators were permitted a degree of gender nonconformity, however, the majority of picture books missed opportunities for a more complete exploration of gender possibilities.  相似文献   
35.
36.
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   

37.
38.
39.
40.
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