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   15940篇
  免费   160篇
  16100篇
  2023年   128篇
  2014年   118篇
  2013年   655篇
  2012年   137篇
  2011年   148篇
  2010年   169篇
  2009年   304篇
  2008年   178篇
  2007年   159篇
  2006年   125篇
  2005年   133篇
  1999年   111篇
  1996年   149篇
  1995年   149篇
  1994年   117篇
  1993年   236篇
  1992年   206篇
  1991年   208篇
  1990年   228篇
  1989年   395篇
  1988年   351篇
  1987年   454篇
  1986年   395篇
  1985年   391篇
  1984年   324篇
  1983年   256篇
  1982年   311篇
  1981年   327篇
  1980年   313篇
  1979年   314篇
  1978年   362篇
  1977年   405篇
  1976年   426篇
  1975年   450篇
  1974年   308篇
  1973年   172篇
  1972年   174篇
  1971年   167篇
  1970年   170篇
  1969年   138篇
  1968年   139篇
  1967年   131篇
  1964年   164篇
  1963年   110篇
  1962年   106篇
  1961年   111篇
  1960年   115篇
  1959年   112篇
  1958年   131篇
  1957年   163篇
排序方式: 共有10000条查询结果,搜索用时 11 毫秒
11.
A case of chromomycosis in which hyperthermia proved effective is reported. The patient was a 56-year-old male bean curd maker who, without any previous history of minor trauma, developed on the extensor side of the left upper arm an eczematous lesion that underwent gradual radial expansion. The lesion showed a well-defined, 7×10 cm infiltrated erythematous plaque with the central area healed and, at the upper and lower borders, adherent scales and crusts on the surface. Histological examination revealed granulomatous changes in the dermis, as well as sclerotic cells within giant cells and microabscesses. On culturing,Fonsecaea pedrosoi was isolated. The patient was treated with disposable chemical pocket warmers, which were secured over the lesion with a rather tight elastic bandage, so that they kept the affected area warm for 24 hours a day. After a month of such hyperthermic treatment, the erythema and infiltration had decreased considerably, and microscopic examination and culture of the crusts both yielded negative results. Examination of biopsy specimens of the lesion after the third month showed that it had cicatrized. The treatment was stopped after 4 months, and no relapse occurred. We also summarize the published results of local hyperthermic treatment of chromomycosis in Japan.  相似文献   
12.
13.
14.
15.
16.
17.
18.
19.
Three experiments were performed to study the influence of challenging incentives on feedback-assisted heart rate reduction for coronary-prone (Type A) and non-coronary-prone (Type B) males. In the first experiment, when subjects were given a competitive instructional set, Type As were significantly more successful relative to Type Bs in reducing their heart rate; with a noncompetitive set, Type Bs were significantly more successful than were Type As. In the second experiment, when told that heart rate reduction was a scarce ability, Type As reduced heart rate significantly better than did Type Bs; when told that heart rate reduction was a common ability, Type Bs achieved significantly greater heart rate reduction than did Type As. In the third experiment, when heart rate reduction was described as being instrumental to time-urgency (i.e., getting more done in less time), Type As reduced heart rate significantly bettern than did Type Bs; when heart rate reduction was described as being instrumental to relaxation, Type Bs were significantly better able to reduce heart rate. In all three studies, the incentives had no effect on heart rate when feedback was not provided. The results are discussed as support for the notion that Type A behavioral pattern characteristics can be exploited to reduce Type A symptoms. Implications for how coronary-prone individuals may be challenged to modify symptoms within the clinical setting are discussed.  相似文献   
20.
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