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   2374458篇
  免费   187991篇
  国内免费   4647篇
耳鼻咽喉   33281篇
儿科学   80174篇
妇产科学   66972篇
基础医学   337831篇
口腔科学   64608篇
临床医学   212960篇
内科学   470561篇
皮肤病学   53596篇
神经病学   191956篇
特种医学   92253篇
外国民族医学   1052篇
外科学   359718篇
综合类   54032篇
现状与发展   4篇
一般理论   792篇
预防医学   185736篇
眼科学   53920篇
药学   172150篇
  3篇
中国医学   5058篇
肿瘤学   130439篇
  2019年   18372篇
  2018年   26203篇
  2017年   19835篇
  2016年   22169篇
  2015年   24934篇
  2014年   35164篇
  2013年   52884篇
  2012年   72292篇
  2011年   76621篇
  2010年   45400篇
  2009年   43196篇
  2008年   71749篇
  2007年   76327篇
  2006年   76914篇
  2005年   74800篇
  2004年   72146篇
  2003年   69143篇
  2002年   67453篇
  2001年   116605篇
  2000年   120092篇
  1999年   101011篇
  1998年   28210篇
  1997年   25467篇
  1996年   25830篇
  1995年   24548篇
  1994年   22660篇
  1993年   21181篇
  1992年   78054篇
  1991年   75366篇
  1990年   72831篇
  1989年   69414篇
  1988年   63841篇
  1987年   62621篇
  1986年   58484篇
  1985年   55957篇
  1984年   42425篇
  1983年   35786篇
  1982年   21380篇
  1981年   19192篇
  1979年   37779篇
  1978年   26487篇
  1977年   22150篇
  1976年   20875篇
  1975年   22098篇
  1974年   26208篇
  1973年   25309篇
  1972年   23489篇
  1971年   21313篇
  1970年   20242篇
  1969年   18518篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
32.
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   
33.
34.
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   

35.
36.
37.
38.
39.
There is a sharp difference in how one views TCR structure–function–behaviour dependent on whether its recognition of major histocompatibility complex‐encoded restriction elements (R) is germline selected or somatically generated. The generally accepted or Standard model is built on the assumption that recognition of R is by the V regions of the αβ TCR, which is not driven by allele specificity, whereas the competing model posits that recognition of R is allele‐specific. The establishing of allele‐specific recognition of R by the TCR would rule out the Standard model and clear the road to a consideration of a competing construct, the Tritope model. Here, the case for allele‐specific recognition (germline selected) is detailed making it obvious that the Standard model is untenable.  相似文献   
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