全文获取类型
收费全文 | 79355篇 |
免费 | 3435篇 |
国内免费 | 1229篇 |
专业分类
耳鼻咽喉 | 980篇 |
儿科学 | 5824篇 |
妇产科学 | 1101篇 |
基础医学 | 5648篇 |
口腔科学 | 1572篇 |
临床医学 | 6445篇 |
内科学 | 14947篇 |
皮肤病学 | 607篇 |
神经病学 | 6308篇 |
特种医学 | 1640篇 |
外国民族医学 | 1篇 |
外科学 | 9376篇 |
综合类 | 7548篇 |
一般理论 | 1篇 |
预防医学 | 9174篇 |
眼科学 | 764篇 |
药学 | 7326篇 |
50篇 | |
中国医学 | 2940篇 |
肿瘤学 | 1767篇 |
出版年
2024年 | 157篇 |
2023年 | 1286篇 |
2022年 | 2321篇 |
2021年 | 3309篇 |
2020年 | 2521篇 |
2019年 | 4517篇 |
2018年 | 3741篇 |
2017年 | 2829篇 |
2016年 | 2112篇 |
2015年 | 1841篇 |
2014年 | 4349篇 |
2013年 | 4077篇 |
2012年 | 3688篇 |
2011年 | 4141篇 |
2010年 | 3104篇 |
2009年 | 2992篇 |
2008年 | 2970篇 |
2007年 | 2849篇 |
2006年 | 2263篇 |
2005年 | 1821篇 |
2004年 | 1421篇 |
2003年 | 1157篇 |
2002年 | 886篇 |
2001年 | 814篇 |
2000年 | 709篇 |
1999年 | 551篇 |
1998年 | 464篇 |
1997年 | 401篇 |
1996年 | 355篇 |
1995年 | 325篇 |
1994年 | 334篇 |
1993年 | 248篇 |
1992年 | 199篇 |
1991年 | 180篇 |
1990年 | 164篇 |
1989年 | 163篇 |
1988年 | 128篇 |
1985年 | 1511篇 |
1984年 | 2526篇 |
1983年 | 2318篇 |
1982年 | 1751篇 |
1981年 | 1828篇 |
1980年 | 1525篇 |
1979年 | 1342篇 |
1978年 | 1165篇 |
1977年 | 676篇 |
1976年 | 1127篇 |
1975年 | 987篇 |
1974年 | 821篇 |
1973年 | 788篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
Children with a specific learning disorder (SLD) are often characterized by marked intellectual strengths and weaknesses. In the last few years, research has focused on a common discrepancy between low working memory and processing speed on the one hand, and high verbal and visuoperceptual intelligence on the other. SLD profiles featuring a specific discrepancy between verbal and visuoperceptual abilities have been only marginally considered, however, and their systematic comparison vis-à-vis typically-developing (TD) populations has yet to be conducted. The present study examined a dataset of 1624 WISC-IV profiles of children with a diagnosis of SLD. It emerged that the proportion of children with a Verbal Comprehension Index (VCI) at least 1.5 SD (22 standardized points) lower than their scores on the Perceptual Reasoning Index (PRI) was larger than the proportion of SLD children with the opposite discrepant profile; it was also larger than the same proportion found among TD children. Comparing the two discrepant profiles revealed that the children also differed by type of learning difficulty, gender, and performance in the WISC-IV Symbol search task. Further examination suggested that children who were discrepant and also distinctly poor in visuoperceptual intelligence were particularly slow in general processing. 相似文献
62.
63.
64.
65.
正确编制“本年盈余与预算结余差异调节表”是公立医院执行《政府会计制度》的一大难点,现有的几种差异调节方法存在诸多不足,核算正确与否依赖会计人员的基本素质,而且工作量巨大。以财务会计与预算会计差异产生的基本原理为基础,利用计算机软件实时校验并自动登记差异,是简便、高效、准确编制“本年盈余与预算结余差异调节表”的方法,本文对此进行了举例说明。 相似文献
66.
Mariko Morimoto 《Health marketing quarterly》2020,37(2):108-123
AbstractThis research explores how the level of consumers’ need for cognition (NFC) is associated with celebrity endorser credibility and examines its effects on advertising-related attitudes. A 3 (endorser types: actor/actress, athlete, TV personality/talent) × 2 (endorser’s gender) factorial experiment with 435 Japanese consumers was conducted. Concerning Japanese OTC drug advertising, lower NFC individuals perceived celebrity endorsers as more credible in comparison to higher NFC individuals. The main effects of NFC and endorser type on endorser credibility existed; however, no interaction between the two variables was found. The endorser type had an influence on attitudes toward ads and the advertised brand. 相似文献
67.
68.
Rosario Fernández-Plata Rogelio Pérez-Padilla Rodrigo Del Río-Hidalgo Cecilia García-Sancho Laura Gochicoa-Rangel Christian Rodríguez-Hernández Luis Torre-Bouscoulet David Martínez-Briseño 《Archivos de bronconeumología》2019,55(10):513-518
IntroductionPeople with Down syndrome (DS) have high respiratory morbidity, evaluating their respiratory health with standardized, objective tests is desirable. Thus, the objective of this study was to evaluate the technical quality of Pulmonary Function Tests (PFTs) to determine which ones are most suitable for this population.MethodsParticipants included children, teenagers and adults with DS, 5 years of age or older (n = 302). The technical quality of the impulse oscillometry system (IOS), forced spirometry, lung-diffusing capacity for carbon monoxide (DLCO), and 6-min walk test (6MWT) were analyzed by age group. Capnography and pulse oximetry were included in the study. Technical quality was determined on the basis of current international PFTs standards.ResultsFifty-one percent of participants were males. A total of 184 participants (71%) who completed the IOS fulfilled the quality criteria, while 210 (70%) completed the 6MWT. Performance on forced spirometry and DLCO was poor. All pulse oximetries and 96% percent heart rates obtained had good quality, but exhaled carbon dioxide (PetCO2) and respiratory rate (RR) showed deficient repeatability.ConclusionsIOS appears to be the most reliable instrument for evaluating lung mechanics in individuals with DS. 相似文献
69.
70.