全文获取类型
收费全文 | 2255776篇 |
免费 | 181764篇 |
国内免费 | 5532篇 |
专业分类
耳鼻咽喉 | 30939篇 |
儿科学 | 70777篇 |
妇产科学 | 63858篇 |
基础医学 | 320109篇 |
口腔科学 | 61619篇 |
临床医学 | 203690篇 |
内科学 | 444453篇 |
皮肤病学 | 49282篇 |
神经病学 | 189196篇 |
特种医学 | 86797篇 |
外国民族医学 | 634篇 |
外科学 | 341415篇 |
综合类 | 55178篇 |
现状与发展 | 4篇 |
一般理论 | 987篇 |
预防医学 | 179772篇 |
眼科学 | 53243篇 |
药学 | 161882篇 |
7篇 | |
中国医学 | 4727篇 |
肿瘤学 | 124503篇 |
出版年
2021年 | 18609篇 |
2019年 | 19503篇 |
2018年 | 26300篇 |
2017年 | 20146篇 |
2016年 | 22668篇 |
2015年 | 25877篇 |
2014年 | 37087篇 |
2013年 | 55063篇 |
2012年 | 75797篇 |
2011年 | 79847篇 |
2010年 | 46601篇 |
2009年 | 43948篇 |
2008年 | 73768篇 |
2007年 | 78546篇 |
2006年 | 78875篇 |
2005年 | 76979篇 |
2004年 | 73794篇 |
2003年 | 70483篇 |
2002年 | 67673篇 |
2001年 | 98429篇 |
2000年 | 100351篇 |
1999年 | 84592篇 |
1998年 | 26375篇 |
1997年 | 23716篇 |
1996年 | 23344篇 |
1995年 | 22208篇 |
1994年 | 20416篇 |
1993年 | 19073篇 |
1992年 | 65726篇 |
1991年 | 63205篇 |
1990年 | 61037篇 |
1989年 | 58388篇 |
1988年 | 54227篇 |
1987年 | 53071篇 |
1986年 | 50033篇 |
1985年 | 48042篇 |
1984年 | 37271篇 |
1983年 | 31690篇 |
1982年 | 20259篇 |
1979年 | 34634篇 |
1978年 | 24835篇 |
1977年 | 20762篇 |
1976年 | 19366篇 |
1975年 | 20196篇 |
1974年 | 24710篇 |
1973年 | 23775篇 |
1972年 | 22461篇 |
1971年 | 20582篇 |
1970年 | 19592篇 |
1969年 | 18514篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
31.
32.
33.
Jamie C. Capuzza 《Journal of Children and Media》2020,14(3):324-342
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
34.
35.
36.
37.
38.
39.
Alexander E. J. Trevatt David R. Thomson Robert Miller Matthew Colquhoun Akinyemi I. Idowu Shakeel Rahman 《Journal of plastic surgery and hand surgery》2019,53(2):97-104
Academic output is just one aspect of a successful career as a plastic surgeon. However, for those with a strong interest in academia, the academic output of a department will likely be a key factor when deciding how to rank jobs. The aim of this study was to quantify and rank the academic output of plastic surgery units across the UK and Ireland. The Institute for Scientific Information (ISI) Web of Science Bibliometric analysis tool was used to collate cumulative (1950–2016), 10 year (2006–2016) and 3 years (2013–2015) research output data for plastic surgery units in the UK and Ireland. Sixty-six plastic surgery units were identified. Departments were ranked for each time period according to the number of papers produced, number of citations (Nc) and h-index (a measure of the impact of scientific output). The top 3 departments for number of papers in the last 10 years were The Royal Free Hospital, London (226) Broomfield Hospital, Chelmsford (218), and Morriston Hospital and Swansea (188). The top 3 for h-number were The Royal Free Hospital (21) Wythenshawe Hospital, Manchester (18) and Morriston Hospital (17). Academic output varies across plastic surgery units in the UK and Ireland. A number of departments have consistently maintained high academic outputs across the years and will be of interest to surgeons hoping to pursue a career in academia. 相似文献
40.
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