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   561754篇
  免费   30282篇
  国内免费   750篇
耳鼻咽喉   7114篇
儿科学   17547篇
妇产科学   13029篇
基础医学   96592篇
口腔科学   13860篇
临床医学   51110篇
内科学   104173篇
皮肤病学   12251篇
神经病学   37338篇
特种医学   21046篇
外国民族医学   53篇
外科学   83202篇
综合类   7693篇
现状与发展   2篇
一般理论   114篇
预防医学   39822篇
眼科学   12475篇
药学   43084篇
  1篇
中国医学   1195篇
肿瘤学   31085篇
  2021年   5118篇
  2019年   4887篇
  2018年   6920篇
  2017年   5062篇
  2016年   5912篇
  2015年   6474篇
  2014年   8552篇
  2013年   12233篇
  2012年   18294篇
  2011年   20016篇
  2010年   11417篇
  2009年   10175篇
  2008年   17814篇
  2007年   19643篇
  2006年   18941篇
  2005年   18069篇
  2004年   17512篇
  2003年   16746篇
  2002年   16064篇
  2001年   22702篇
  2000年   23225篇
  1999年   19178篇
  1998年   5484篇
  1997年   4568篇
  1996年   4553篇
  1995年   4274篇
  1992年   14530篇
  1991年   15911篇
  1990年   16050篇
  1989年   15699篇
  1988年   14405篇
  1987年   14273篇
  1986年   13223篇
  1985年   12759篇
  1984年   9458篇
  1983年   8053篇
  1982年   4226篇
  1979年   8983篇
  1978年   6418篇
  1977年   5178篇
  1976年   5523篇
  1975年   6638篇
  1974年   7447篇
  1973年   7192篇
  1972年   6626篇
  1971年   6325篇
  1970年   5904篇
  1969年   5478篇
  1968年   5169篇
  1967年   4634篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Journal of Behavioral Medicine - Evidence supports the use of graphic warnings to educate the public about the health harms of smoking and suggests warnings eliciting negative emotional responses...  相似文献   
2.
The adrenal cortex gives rise to a biologically heterogenous group of neoplasms, each with a distinct morphology, antigen expression and molecular profile. Adrenal cortical adenomas have excellent prognosis and are usually cured by surgical resection alone, while adrenal cortical carcinomas are very aggressive tumors with a poor prognosis regardless of therapy. These tumors are rare and often challenging for a pathologist to diagnose, as significant overlap exists between benign and malignant lesions in some cases. In this review, we attempt to summarize most important histologic and clinical features of adrenal cortical adenomas and carcinomas, clarify the use of different grading systems, the use of special stains and the differential diagnosis for practicing pathologists. Most relevant hereditary syndromes associated with adrenal cortical tumors are listed. Updates in molecular alterations in adrenal cortical neoplasms and hyperplastic diseases as well as their clinical significance and potential therapeutic implications are also discussed.  相似文献   
3.
4.
5.
Journal of Immigrant and Minority Health - COVID-19 has disproportionally affected underrepresented minorities (URM) and low-income immigrants in the United States. The aim of the study is to...  相似文献   
6.
Whereas there is evidence that interpersonal communication, or conversation, influences predictors of alcohol consumption, the role of involvement in conversation effects remains unclear. This study explored how three aspects of involvement (topical relevance, or how relevant the topic of alcohol is; conversational relevance, or how relevant a conversation about alcohol is; and conversational effort, or how much effort people put into such a conversation), influence conversation effects. After assessing topical relevance, 46 same-sex dyads were requested to talk about the negative consequences of heavy drinking. Within each dyad, one participant was asked to take on an active talking role and the other participant a passive listening role. Next, conversational relevance, effort, and predictors of heavy drinking were measured. Results showed that participants who drank more alcohol found the topic of heavy drinking more relevant. This topical relevance increased conversational relevance and conversational effort. Conversational effort further increased when a talking role was assigned. Furthermore, participants who put more effort in the conversation and found it more relevant had more positive norms, identified more strongly with alcohol, and had higher intentions to drink. These findings suggest that more involvement in an alcohol-related conversation does not always lead to desirable outcomes.  相似文献   
7.
8.
Pharmaceutical Chemistry Journal - An HPLC-MS method for simultaneous quantitative determination of a novel gestagenic pharmaceutical and two of its metabolites in rat and rabbit blood sera was...  相似文献   
9.
Bulletin of Experimental Biology and Medicine - Ammonium, an end-product of catabolism, in low doses can promote adaptation of metabolic pathways in erythrocytes under conditions of extreme...  相似文献   
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