首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1356507篇
  免费   105269篇
  国内免费   7209篇
耳鼻咽喉   18981篇
儿科学   45301篇
妇产科学   36179篇
基础医学   191499篇
口腔科学   35100篇
临床医学   121207篇
内科学   270252篇
皮肤病学   28807篇
神经病学   104555篇
特种医学   53938篇
外国民族医学   692篇
外科学   203823篇
综合类   39906篇
现状与发展   15篇
一般理论   388篇
预防医学   101098篇
眼科学   29989篇
药学   103236篇
  82篇
中国医学   6754篇
肿瘤学   77183篇
  2021年   11998篇
  2019年   11694篇
  2018年   15865篇
  2017年   12430篇
  2016年   13205篇
  2015年   15885篇
  2014年   21422篇
  2013年   30223篇
  2012年   42003篇
  2011年   44418篇
  2010年   26886篇
  2009年   25018篇
  2008年   40944篇
  2007年   43375篇
  2006年   43248篇
  2005年   42133篇
  2004年   40244篇
  2003年   38867篇
  2002年   37940篇
  2001年   65627篇
  2000年   68237篇
  1999年   58237篇
  1998年   16364篇
  1997年   14976篇
  1996年   15158篇
  1995年   14383篇
  1994年   13527篇
  1993年   12257篇
  1992年   45063篇
  1991年   43933篇
  1990年   42608篇
  1989年   40471篇
  1988年   37172篇
  1987年   36505篇
  1986年   33825篇
  1985年   32447篇
  1984年   24247篇
  1983年   20342篇
  1982年   11775篇
  1981年   10733篇
  1979年   21379篇
  1978年   14835篇
  1977年   12543篇
  1976年   11704篇
  1975年   12634篇
  1974年   14673篇
  1973年   14134篇
  1972年   12958篇
  1971年   11736篇
  1970年   11063篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
We report our experience of eight cases of isolated full thickness burns of the penis. Early excision of burns of the penile shaft and repair with a preputial flap or mesh split skin graft produces excellent results, with a reduction in complications and an early re-establishment of sexual function. Conservative treatment of burns of the glans, on the other hand, is appropriate and results in minimal scarring.  相似文献   
73.
The use of additional epidural sympathetic block during and after microvascular surgery in the lower extremities to prevent vasospasm is generally agreed on. However, a significant fall in the perfusion rate of the transplants was seen after application of bupivacaine (Marcain) via the epidural catheter. This effect has, to our knowledge, not been described before and is probably caused by the sympathectomy effect of this type of analgesia.  相似文献   
74.
The present study demonstrates that alcohol-induced memory impairment can be attenuated by pretreatment with an oral tryptophan supplementation. These results provide support for the role of a brain serotonin deficit in this impairment and highlight the impact a dietary manipulation can have on a complex behavioral process.  相似文献   
75.
The Dundee Memory Clinic was established in 1991. This paper reviews the diagnosis of the first 150 attenders and compares the findings with those of other memory clinics.  相似文献   
76.
Macrophage NRAMP1 and its role in resistance to microbial infections   总被引:12,自引:0,他引:12  
  相似文献   
77.
78.
79.
With pulsed X-ray cinematography we have analysed the angular excursions of the distal hindlimb joints (proximal interphalangeal, PIP; metatarsophalangeal, MTP; ankle) in cats walking on a treadmill. These distal joints transmit the body weight and the dynamic forces onto the ground. We have included the knee and hip joints in the analysis to relate the angular excursions of the proximal and distal joints and to verify the data previously obtained with external markers on the kinematics of the proximal joints. At the beginning of the stance phase the PIP joints flexed rapidly, the MTP joints extended slowly and the ankle and knee yielded under body weight. Whereas the PIP joints maintained a rather constant angular position of −75° throughout the stance phase, extension continued in the MTP joints from −230° at touch-down to −270° at the end of the stance phase. Around 50 ms before lift-off the MTP joints flexed rapidly. Early (−30 ms) after lift-off this flexion changed into a slow extension. The PIP joints extended swiftly at the stance-swing transition and moderately at the end of the swing phase. During the middle part of the swing phase they flexed slowly. Small rotatory movements around the long axis of the foot took place in the last 100 ms of the swing phase. The results of this study on the distal joints are discussed in relation to the placing of the paw, to the translation of forward propulsion into a MTP movement and to the lifting of the paw (conventionally described as toe curling). They show a differentiated mechanical interaction between the different distal limb joints during these different phases, which must be known in detail to interpret the corresponding electromyographic data and to understand how the hip is moved forward over the MTP joints which serve as the final pivot during stance.  相似文献   
80.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号