全文获取类型
收费全文 | 2502篇 |
免费 | 238篇 |
国内免费 | 148篇 |
专业分类
耳鼻咽喉 | 31篇 |
儿科学 | 80篇 |
妇产科学 | 40篇 |
基础医学 | 400篇 |
口腔科学 | 81篇 |
临床医学 | 331篇 |
内科学 | 648篇 |
皮肤病学 | 48篇 |
神经病学 | 89篇 |
特种医学 | 334篇 |
外科学 | 272篇 |
综合类 | 37篇 |
预防医学 | 136篇 |
眼科学 | 19篇 |
药学 | 237篇 |
1篇 | |
肿瘤学 | 104篇 |
出版年
2021年 | 31篇 |
2020年 | 26篇 |
2019年 | 29篇 |
2018年 | 41篇 |
2017年 | 23篇 |
2016年 | 38篇 |
2015年 | 30篇 |
2014年 | 45篇 |
2013年 | 77篇 |
2012年 | 88篇 |
2011年 | 85篇 |
2010年 | 72篇 |
2009年 | 74篇 |
2008年 | 88篇 |
2007年 | 197篇 |
2006年 | 80篇 |
2005年 | 89篇 |
2004年 | 64篇 |
2003年 | 50篇 |
2002年 | 74篇 |
2001年 | 62篇 |
2000年 | 68篇 |
1999年 | 59篇 |
1998年 | 95篇 |
1997年 | 87篇 |
1996年 | 91篇 |
1995年 | 84篇 |
1994年 | 58篇 |
1993年 | 67篇 |
1992年 | 29篇 |
1991年 | 37篇 |
1990年 | 29篇 |
1989年 | 62篇 |
1988年 | 50篇 |
1987年 | 42篇 |
1986年 | 42篇 |
1985年 | 41篇 |
1984年 | 37篇 |
1983年 | 30篇 |
1982年 | 33篇 |
1980年 | 22篇 |
1979年 | 20篇 |
1977年 | 43篇 |
1976年 | 41篇 |
1975年 | 30篇 |
1974年 | 58篇 |
1973年 | 43篇 |
1972年 | 43篇 |
1971年 | 29篇 |
1970年 | 25篇 |
排序方式: 共有2888条查询结果,搜索用时 328 毫秒
11.
Lorien Abroms Cynthia M Jorgensen Brian G Southwell Alan C Geller Karen M Emmons 《Health education & behavior》2003,30(1):29-43
This study employs focus group methodology to explore gender differences in sunscreen use. Guided by the theory of reasoned action, males and females were found to differ on each of the following constructs: behavior, behavioral beliefs, and normative beliefs. Males and females differed in their sunscreen use, with females adopting a more preventive style of sunscreen use and males a more reactive style. Males and females differed in their salient beliefs that motivated their sunscreen use, many of which were related to traditional American gender roles. In addition, although males and females were aware of both positive and negative sources of normative beliefs regarding sunscreen use, females received more encouragement from their mothers and peers than males. Findings are discussed in terms of their implications for the design of future interventions. 相似文献
12.
13.
14.
Intestinal schistosomiasis japonica: CT-pathologic correlation 总被引:1,自引:0,他引:1
Lee RC; Chiang JH; Chou YH; Rubesin SE; Wu HP; Jeng WC; Hsu CC; Tiu CM; Chang T 《Radiology》1994,193(2):539
15.
16.
17.
18.
19.
The patellofemoral joint was imaged with magnetic resonance (MR) in the axial plane while the knee was positioned from 0 degrees to 32 degrees of flexion (nine positions). These multiple sequential images obtained within the early phases of flexion of the knee were viewed in a "cine-loop" format, producing a kinematic study that clearly demonstrated the relationship of the patella to the trochlear groove. Four healthy subjects and one patient with known bilateral subluxing patellae were studied. The preliminary results suggest that kinematic MR imaging of the patellofemoral joint is potentially useful for the evaluation of patellar tracking abnormalities. 相似文献
20.
Thirty subjects with a family history of hypertension and 28 subjects without such a history performed a Stroop Color-Word Interference task, a mental arithmetic task (serial subtraction of sevens), and a shock avoidance task (repeating digits backward while expecting to be shocked for mistakes). Systolic and diastolic blood pressure and pulse rate were recorded while subjects anticipated, undertook, and recovered from the shock avoidance task and undertook and recovered from the Stroop and mental arithmetic tasks. It was found that compared to nonfamily history subjects, family history subjects manifested reliably greater cardiovascular reactivity during each task and in anticipation of the shock avoidance task. These results are congruent with the notion that excessive sympathetic nervous system reactivity—possibly genetically determined—is involved in the development of some form(s) of essential hypertension. Further, the results indicated that family history subjects manifested greater consistency, or stereotypy, of cardiovascular response across the experimental tasks than nonfamily history subjects. The possible role of cardiovascular stereotypy in the development of essential hypertension is also discussed.This investigation was supported by University of Kansas General Research Allocation 3115-xO-0038 to B. Kent Houston. 相似文献