全文获取类型
收费全文 | 6044篇 |
免费 | 275篇 |
国内免费 | 102篇 |
专业分类
耳鼻咽喉 | 65篇 |
儿科学 | 71篇 |
妇产科学 | 195篇 |
基础医学 | 447篇 |
口腔科学 | 198篇 |
临床医学 | 440篇 |
内科学 | 1993篇 |
皮肤病学 | 84篇 |
神经病学 | 402篇 |
特种医学 | 227篇 |
外科学 | 1324篇 |
综合类 | 27篇 |
现状与发展 | 1篇 |
一般理论 | 2篇 |
预防医学 | 217篇 |
眼科学 | 131篇 |
药学 | 238篇 |
中国医学 | 3篇 |
肿瘤学 | 356篇 |
出版年
2024年 | 3篇 |
2023年 | 68篇 |
2022年 | 122篇 |
2021年 | 277篇 |
2020年 | 164篇 |
2019年 | 220篇 |
2018年 | 266篇 |
2017年 | 155篇 |
2016年 | 192篇 |
2015年 | 180篇 |
2014年 | 295篇 |
2013年 | 341篇 |
2012年 | 512篇 |
2011年 | 551篇 |
2010年 | 351篇 |
2009年 | 313篇 |
2008年 | 444篇 |
2007年 | 471篇 |
2006年 | 430篇 |
2005年 | 315篇 |
2004年 | 262篇 |
2003年 | 184篇 |
2002年 | 147篇 |
2001年 | 39篇 |
2000年 | 14篇 |
1999年 | 14篇 |
1998年 | 26篇 |
1997年 | 15篇 |
1996年 | 13篇 |
1995年 | 8篇 |
1994年 | 14篇 |
1993年 | 2篇 |
1992年 | 3篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1986年 | 1篇 |
1984年 | 2篇 |
1979年 | 1篇 |
1975年 | 2篇 |
1969年 | 1篇 |
排序方式: 共有6421条查询结果,搜索用时 375 毫秒
911.
912.
913.
914.
915.
916.
917.
Parperis Konstantinos Abdulqader Yasir Myers Robert Bhattarai Bikash Al-Ani Muhsen 《Clinical rheumatology》2019,38(1):71-76
Clinical Rheumatology - The aim of the study was to calculate the proportion of rheumatic diseases in HIV patients who were receiving ART and to identify association of the HIV medications with the... 相似文献
918.
Tsitsimpikou C Chrisostomou N Papalexis P Tsarouhas K Tsatsakis A Jamurtas A 《International journal of sport nutrition and exercise metabolism》2011,21(5):377-384
Although the use of nutritional supplements by professional athletes and the benefits thereof have been extensively studied, information on recreational athletes' use of supplements is limited. This study investigated the consumption of nutritional supplements, source of information and supply of supplements, and level of awareness with regard to the relevant legislation among individuals who undertake regular exercise in Athens, Greece. A closed-ended, anonymous questionnaire was answered by 329 subjects (180 men, 149 women), age 30.6 ± 12.1 yr, from 11 randomly selected gym centers. Preparations declared as anabolic agents by the users were submitted to a gas chromatographic analyzer coupled to a mass spectrometric detector. Consumption of nutritional supplements was reported by 41% of the study population, with proteins/amino acids and vitamins being the most popular. Age (r = .456, p = .035), sex (χ2 = 14.1, df = 1, p < .001), level of education (χ2 = 14.1, df = 3, p < .001), and profession (χ2 = 11.4, df = 4, p = .022) were associated with the subjects' decision to consume nutritional supplements. Most (67.1%) purchased products from health food stores. Only 17.1% had consulted a physician or nutritionist, and one third were aware of the relevant legislation. Two preparations were detected containing synthetic anabolic steroids not stated on the label. In conclusion, use of nutritional supplements was common among recreational athletes in Athens, Greece. A low level of awareness and low involvement of health care professionals as sources of information and supply were observed. 相似文献
919.
920.