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   1333898篇
  免费   102010篇
  国内免费   2166篇
耳鼻咽喉   19158篇
儿科学   45569篇
妇产科学   35730篇
基础医学   189351篇
口腔科学   34487篇
临床医学   117268篇
内科学   269770篇
皮肤病学   28714篇
神经病学   105958篇
特种医学   53102篇
外国民族医学   665篇
外科学   206237篇
综合类   27563篇
现状与发展   1篇
一般理论   423篇
预防医学   99669篇
眼科学   29040篇
药学   98576篇
  2篇
中国医学   2482篇
肿瘤学   74309篇
  2019年   10634篇
  2018年   15010篇
  2017年   11302篇
  2016年   12306篇
  2015年   13978篇
  2014年   19479篇
  2013年   29146篇
  2012年   40519篇
  2011年   42678篇
  2010年   25314篇
  2009年   24097篇
  2008年   40386篇
  2007年   43116篇
  2006年   43204篇
  2005年   41992篇
  2004年   40752篇
  2003年   39462篇
  2002年   38507篇
  2001年   64372篇
  2000年   66785篇
  1999年   56747篇
  1998年   15676篇
  1997年   14175篇
  1996年   14538篇
  1995年   13739篇
  1994年   13018篇
  1993年   12030篇
  1992年   44735篇
  1991年   43611篇
  1990年   42336篇
  1989年   40215篇
  1988年   37006篇
  1987年   36329篇
  1986年   33704篇
  1985年   32353篇
  1984年   24246篇
  1983年   20350篇
  1982年   11816篇
  1981年   10780篇
  1979年   21382篇
  1978年   14869篇
  1977年   12575篇
  1976年   11724篇
  1975年   12644篇
  1974年   14688篇
  1973年   14135篇
  1972年   12955篇
  1971年   11738篇
  1970年   11059篇
  1969年   10034篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
73.
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   
74.
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   
75.
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   
76.
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   
77.
Macrophage NRAMP1 and its role in resistance to microbial infections   总被引:12,自引:0,他引:12  
  相似文献   
78.
79.
80.
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   
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