全文获取类型
收费全文 | 32458篇 |
免费 | 2709篇 |
国内免费 | 51篇 |
专业分类
耳鼻咽喉 | 474篇 |
儿科学 | 964篇 |
妇产科学 | 903篇 |
基础医学 | 4222篇 |
口腔科学 | 727篇 |
临床医学 | 4491篇 |
内科学 | 5442篇 |
皮肤病学 | 282篇 |
神经病学 | 2571篇 |
特种医学 | 979篇 |
外科学 | 4292篇 |
综合类 | 633篇 |
一般理论 | 23篇 |
预防医学 | 4237篇 |
眼科学 | 539篇 |
药学 | 2227篇 |
中国医学 | 46篇 |
肿瘤学 | 2166篇 |
出版年
2021年 | 441篇 |
2020年 | 348篇 |
2019年 | 567篇 |
2018年 | 626篇 |
2017年 | 497篇 |
2016年 | 476篇 |
2015年 | 588篇 |
2014年 | 793篇 |
2013年 | 1170篇 |
2012年 | 1775篇 |
2011年 | 1754篇 |
2010年 | 931篇 |
2009年 | 829篇 |
2008年 | 1552篇 |
2007年 | 1685篇 |
2006年 | 1525篇 |
2005年 | 1543篇 |
2004年 | 1482篇 |
2003年 | 1448篇 |
2002年 | 1333篇 |
2001年 | 928篇 |
2000年 | 901篇 |
1999年 | 771篇 |
1998年 | 424篇 |
1997年 | 353篇 |
1996年 | 334篇 |
1995年 | 355篇 |
1994年 | 265篇 |
1993年 | 246篇 |
1992年 | 629篇 |
1991年 | 553篇 |
1990年 | 529篇 |
1989年 | 513篇 |
1988年 | 509篇 |
1987年 | 449篇 |
1986年 | 488篇 |
1985年 | 479篇 |
1984年 | 391篇 |
1983年 | 325篇 |
1982年 | 226篇 |
1981年 | 219篇 |
1980年 | 233篇 |
1979年 | 357篇 |
1978年 | 243篇 |
1977年 | 227篇 |
1975年 | 194篇 |
1974年 | 233篇 |
1973年 | 214篇 |
1972年 | 205篇 |
1969年 | 200篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
Dongbing Lai Emma C. Johnson Sarah Colbert Gayathri Pandey Grace Chan Lance Bauer Meredith W. Francis Victor Hesselbrock Chella Kamarajan John Kramer Weipeng Kuang Sally Kuo Samuel Kuperman Yunlong Liu Vivia McCutcheon Zhiping Pang Martin H. Plawecki Marc Schuckit Jay Tischfield Leah Wetherill Yong Zang Howard J. Edenberg Bernice Porjesz Arpana Agrawal Tatiana Foroud 《Alcoholism, clinical and experimental research》2022,46(3):374-383
2.
3.
Knox Joseph A. Kumar Vishal Conrad Miles B. Nanavati Sujal Moore Teri Wilson Mark 《Emergency radiology》2022,29(3):605-609
Emergency Radiology - Access to multi-detector computed tomography (MDCT) scanning for interventional procedures can prove to be logistically challenging as resources are often in different areas... 相似文献
4.
5.
6.
7.
8.
Gary N. McAuliffe Susan L. Taylor Sharon Moore Joanne Hewitt Arlo Upton Anna S. Howe Emma J. Best 《Diagnostic microbiology and infectious disease》2019,93(3):203-207
Rotavirus vaccine has reduced disease prevalence in many countries. Consequently, we aimed to assess the reliability of a rotavirus immunoassay in the community population of Auckland and Northland, New Zealand. Between 22 October 2015 and 31 December 2016, 2873 fecal samples were tested by enzyme immunoassay (EIA, Rotascreen II, Microgen, UK) from 2748 patients (median age 8?years, range 0–101?years). Eighty-nine (3.1%) samples were reactive; 86 samples were tested by a second method. Rotavirus was confirmed in 49/86 (57%). Positive rotavirus EIAs were more likely to be confirmed in samples from cases ≥1?year of age (positive predictive value [PPV] 61%, 95% confidence interval [CI] 50–72%, P?=?0.049) and in spring/summer (PPV 67%, 95% CI 55–78%, P?=?0.003). Reactive rotavirus tests required confirmatory testing regardless of demographic, vaccine, or seasonal factors; a review of rotavirus testing algorithms may be necessary in other vaccinated community populations. 相似文献
9.
10.
Nathan Scudder James Robertson Sally F. Kelty Simon J. Walsh Dennis McNevin 《The Australian journal of forensic sciences》2020,52(2):235-241
ABSTRACTForensic DNA analysis is dependent on comparing the known and the unknown. Expand the number of known profiles, and the likelihood of a successful match increases. Forensic use of DNA is moving towards comparing samples of unknown origin with publicly available genetic data, such as the records held by genetic genealogy providers. Use of forensic genetic genealogy has yielded a number of recent high-profile successes but has raised ethical and privacy concerns. Navigating family trees is complex, even more so when combined with a comparison of genetic relationships. This intelligence-gathering process has led to occasional false leads, and its use also risks a public backlash, similar to concerns over Cambridge Analytica. A cautious approach to use of this technique is therefore warranted. 相似文献