全文获取类型
| 收费全文 | 6179篇 |
| 免费 | 442篇 |
| 国内免费 | 1篇 |
专业分类
| 林业 | 381篇 |
| 农学 | 158篇 |
| 基础科学 | 40篇 |
| 1154篇 | |
| 综合类 | 1012篇 |
| 农作物 | 275篇 |
| 水产渔业 | 364篇 |
| 畜牧兽医 | 2622篇 |
| 园艺 | 167篇 |
| 植物保护 | 449篇 |
出版年
| 2023年 | 64篇 |
| 2022年 | 53篇 |
| 2021年 | 137篇 |
| 2020年 | 163篇 |
| 2019年 | 160篇 |
| 2018年 | 152篇 |
| 2017年 | 144篇 |
| 2016年 | 176篇 |
| 2015年 | 137篇 |
| 2014年 | 186篇 |
| 2013年 | 265篇 |
| 2012年 | 370篇 |
| 2011年 | 428篇 |
| 2010年 | 252篇 |
| 2009年 | 217篇 |
| 2008年 | 378篇 |
| 2007年 | 351篇 |
| 2006年 | 348篇 |
| 2005年 | 310篇 |
| 2004年 | 257篇 |
| 2003年 | 291篇 |
| 2002年 | 246篇 |
| 2001年 | 76篇 |
| 2000年 | 91篇 |
| 1999年 | 91篇 |
| 1998年 | 52篇 |
| 1997年 | 43篇 |
| 1996年 | 43篇 |
| 1995年 | 40篇 |
| 1994年 | 36篇 |
| 1993年 | 43篇 |
| 1992年 | 41篇 |
| 1991年 | 58篇 |
| 1990年 | 51篇 |
| 1989年 | 50篇 |
| 1988年 | 37篇 |
| 1987年 | 64篇 |
| 1986年 | 42篇 |
| 1985年 | 60篇 |
| 1984年 | 38篇 |
| 1983年 | 47篇 |
| 1982年 | 25篇 |
| 1981年 | 24篇 |
| 1980年 | 26篇 |
| 1979年 | 34篇 |
| 1978年 | 26篇 |
| 1976年 | 26篇 |
| 1973年 | 28篇 |
| 1970年 | 24篇 |
| 1969年 | 31篇 |
排序方式： 共有6622条查询结果，搜索用时 234 毫秒
41.
Comparison of bupivacaine and dexmedetomidine femoral and sciatic nerve blocks with bupivacaine and buprenorphine epidural injection for stifle arthroplasty in dogs 
下载免费PDF全文
下载免费PDF全文 42.
43.
44.
Kimberly Bridges Nicole Beckel Claire Sharp Laura Stern 《The Canadian veterinary journal. La revue veterinaire canadienne》2016,57(5):511-513
A 5-month-old pit bull terrier was presented for evaluation of progressive lethargy, vomiting, diarrhea, and anorexia 45 hours after ingestion of 625 mg/kg body weight (BW) (9000 mg) of the antiviral medication, ribavirin. Abnormalities that were detected included dehydration, tachycardia, elevated liver enzymes, and prolonged prothrombin time. The dog was discharged after 5 days of aggressive supportive care consisting of intravenous fluids, antiemetics, gastroprotectants, hepatoprotectants, dextrose supplementation, and vitamin B/K1 supplementation. 相似文献
45.
46.
47.
48.
49.
50.
M. Joscht M. Martin M. Henin J. F. Nisolle N. Kirschvink A. Dugdale B. Godart H. Coulon V. Simon F. Hontoir R. Graffin Y. De Raeve J. M. Vandeweerd 《Anatomia, histologia, embryologia》2016,45(6):443-449
External iliac artery atherosclerotic disease and aneurism occur in man. For treatment, imaging is required to facilitate minimally invasive introduction and advancement of stents within the intended vessels. Sheep are commonly used to test and improve stents. However, little information is published regarding the angiographic anatomy of the iliac arteries in the ovine species. The objective of this study was to describe the angiographic anatomy of the iliac arteries in the sheep. Computed tomography (CT) angiography and gross anatomical dissection were performed in, respectively, 10 and 43 adult ewes. Diameters and lengths of the arteries were measured. In comparison with man, salient anatomical differences were identified in the sheep: (1) the absence of common iliac arteries, (2) the common trunk at the origin of internal iliac arteries and (3) the location of the bifurcation of the external iliac arteries into femoral arteries in the pelvis (not in the limb). External iliac arteries in this series of sheep were 86 mm long in average and had a mean diameter of 7.5 mm. Lengths of arteries are only slightly different between man and sheep, while diameters are rather similar. Therefore, the sheep model appears to be sufficiently similar to man to test stent properties. This study provides useful reference images and measures of lengths and diameters of relevant arteries that could be applied to research with ovine models. 相似文献