全文获取类型
收费全文 | 74792篇 |
免费 | 8858篇 |
国内免费 | 182篇 |
专业分类
耳鼻咽喉 | 555篇 |
儿科学 | 2496篇 |
妇产科学 | 3450篇 |
基础医学 | 6865篇 |
口腔科学 | 774篇 |
临床医学 | 24267篇 |
内科学 | 12365篇 |
皮肤病学 | 873篇 |
神经病学 | 5915篇 |
特种医学 | 1316篇 |
外国民族医学 | 33篇 |
外科学 | 6056篇 |
综合类 | 809篇 |
一般理论 | 88篇 |
预防医学 | 9645篇 |
眼科学 | 600篇 |
药学 | 3276篇 |
3篇 | |
中国医学 | 92篇 |
肿瘤学 | 4354篇 |
出版年
2023年 | 1095篇 |
2022年 | 576篇 |
2021年 | 1337篇 |
2020年 | 1359篇 |
2019年 | 1421篇 |
2018年 | 2438篇 |
2017年 | 2283篇 |
2016年 | 2455篇 |
2015年 | 2603篇 |
2014年 | 3065篇 |
2013年 | 4377篇 |
2012年 | 4233篇 |
2011年 | 4729篇 |
2010年 | 3211篇 |
2009年 | 3282篇 |
2008年 | 4208篇 |
2007年 | 4547篇 |
2006年 | 4432篇 |
2005年 | 4218篇 |
2004年 | 4016篇 |
2003年 | 3826篇 |
2002年 | 3541篇 |
2001年 | 997篇 |
2000年 | 677篇 |
1999年 | 921篇 |
1998年 | 1265篇 |
1997年 | 1224篇 |
1996年 | 1092篇 |
1995年 | 957篇 |
1994年 | 792篇 |
1993年 | 714篇 |
1992年 | 587篇 |
1991年 | 529篇 |
1990年 | 522篇 |
1989年 | 419篇 |
1988年 | 373篇 |
1987年 | 379篇 |
1986年 | 342篇 |
1985年 | 377篇 |
1984年 | 359篇 |
1983年 | 378篇 |
1982年 | 378篇 |
1981年 | 369篇 |
1980年 | 269篇 |
1979年 | 243篇 |
1978年 | 195篇 |
1977年 | 221篇 |
1976年 | 199篇 |
1975年 | 158篇 |
1972年 | 162篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
63.
64.
65.
66.
67.
Tinghu Kang Yang Li Jiandong Guo Xingwen Ma Fatema Akhter Hiramoni Md Zahir Ahmed Mary C. Jobe Oli Ahmed 《International Journal of Mental Health Promotion, The》2022,24(2):207-217
The aim of the study was to explore the relationship between college graduates’ dual self-consciousness, job search
clarity and perceived stress, and reveal the mediating role of perceived stress between dual self-consciousness and
job search clarity. In this study, 467 college graduates were investigated using the Dual Self-Consciousness Scale,
Job Search Clarity Scale, and Perceived Stress Scale. After controlling for gender, age, and region, the results
revealed that: (1) private self-consciousness has a significant positive predictive effect on job search clarity; (2)
perceived stress has a significant negative predictive effect on job search clarity; (3) perceived stress plays partial
mediation effects between private self-consciousness and job search clarity; (4) perceived stress plays complete
mediation effects between public self-consciousness and job search clarity; (5) perceived stress has suppressing
effects between public self-consciousness and job search clarity. 相似文献
68.
69.
70.
Reem Haj-Ali BDS DDS MS ; Mary Walker DDS PhD ; Karen Williams PhD ; Yong Wang PhD ; Paulette Spencer DDS PhD 《Journal of prosthodontics》2006,15(2):82-88
PURPOSE: The purpose of this study was to compare the dentin/adhesive interfacial characteristics when bonding to noncarious as well as caries-affected dentin. MATERIALS AND METHODS: Seven extracted, unerupted, third molars were sectioned into halves. Artificial caries was created on one-half of each tooth, leaving the other half as a control. Dentin surfaces were treated with UNO adhesive according to the manufacturer's instructions for the wet-bonding technique and under environmental conditions present in the oral cavity. Dentin/adhesive interface sections of each half-tooth were stained with Goldner's trichrome, a classic bone stain, and examined using light microscopy. The width of exposed collagen was measured directly from photomicrographs, and adhesive penetration was analyzed qualitatively. RESULTS: The degree and extent to which the adhesive encapsulated the demineralized dentin matrix were reflected in the color difference in the stained sections with the noncarious dentin sections showing a degree of collagen encapsulation superior to that of the caries-affected dentin sections. The overall mean widths of exposed collagen were significantly (p < or = .05) greater at the caries-affected dentin/adhesive interface, 8.6 (1.7) microm, as compared with those at the noncarious dentin/adhesive interface, 6.0 (1.5) microm. CONCLUSIONS: The morphologic characteristics of the caries-affected dentin/interface suggest an increase in the exposed collagen zone and a decrease in the quality of the adhesive infiltration when compared with noncarious dentin. The evidence suggests that dentin substrate characteristics have a significant effect on the dentin/adhesive interface structure. 相似文献