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   55605篇
  免费   1948篇
  国内免费   19篇
  57572篇
  2018年   829篇
  2017年   823篇
  2016年   900篇
  2015年   624篇
  2014年   774篇
  2013年   4882篇
  2012年   1409篇
  2011年   1496篇
  2010年   947篇
  2009年   898篇
  2008年   1345篇
  2007年   1254篇
  2006年   1160篇
  2005年   1001篇
  2004年   983篇
  2003年   980篇
  2002年   992篇
  2001年   1761篇
  2000年   1704篇
  1999年   1308篇
  1998年   603篇
  1996年   652篇
  1995年   612篇
  1994年   617篇
  1993年   604篇
  1992年   1267篇
  1991年   1140篇
  1990年   1162篇
  1989年   1058篇
  1988年   1041篇
  1987年   1025篇
  1986年   1030篇
  1985年   1034篇
  1984年   873篇
  1983年   746篇
  1982年   590篇
  1981年   595篇
  1979年   892篇
  1978年   673篇
  1976年   576篇
  1975年   827篇
  1974年   833篇
  1973年   881篇
  1972年   816篇
  1971年   730篇
  1970年   658篇
  1969年   704篇
  1968年   832篇
  1967年   721篇
  1966年   718篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
53 female and 45 male undergraduates were administered the Spatial Antecedents Questionnaire (Activities, Academic Courses, Self-assessments, and Environmental Mapping subscales), the Spatial Dimensionality Test (Embedded Figures, Card Rotations, Paper Folding, Surface Development, Horizontal/Vertical Rotations, and Cube Perspectives subtests), and Revised-Individual Differences Questionnaire of Paivio. Scores from the Academic Courses and Self-assessment scales accounted for the most variability in spatial performance. Visual processing style correlated with performance on spatial tests for men, but not for women. Different patterns of activities and experiences correlated with spatial test performance for men and women.  相似文献   
992.
993.
With the Structured Psychopathological Evaluation-System (SPES) an instrument existed for employment of objective criteria. This study was designed to present an evaluation system based on new scientific results, that is applying on the strength of a reduced catalogue of symptoms (94 compared with 198 Items at SPES-A) to clinical routine. Additional findings differentiated by this system be able to classify by the help of an operational decision system.  相似文献   
994.
295 expert opinans of the NVA (National People's Army) in conditions after craniocerebral traumas for which an EEG findings was present were subjected to an retrospective analysis to determine the importance of EEG for export opinion. In 59.3% of cases EEG was significant for expert opinion, but was of prime importance only in 1.3%. In 161 expert opinions the total damage of the body was determined. This gave the possibility of a statistical correlation of individual EEG findings with the extent of the body damage. Mean percentage values of the individual degrees of severity of EEG changes could be calculated on the basis of these data. The great importance of EEG for military medical opinion could also be confirmed in comparison with 8 other clinical data and findings.  相似文献   
995.
The authors sum up the most important basic principles of diagnostics and genetics of the schizophrenic psychoses from the viewpoint of genetic counseling for the practising psychiatrist and medical geneticist. Regarding genetic counselling strategy, in addition to nosological considerations, they stress the importance of socio-cultural and social psychological factors and of the emotional atmosphere in the family, which should all be taken into account together. Because of the special situation of schizophrenic (and in general, psychiatric) patients and their families, they regard it as advisable to set up a separate psychiatric genetic counselling service.  相似文献   
996.
Of 1028 patients with 1138 peripheral nerve lesions, 142 suffered from an electrophysiologically proven SUS. At follow-up, 93 patients could be restudied. Spontaneous regressions were observed in patients below the age of 40 years and in case of a history under 6 months. So-called late pareses receded in no case without operative displacement of the ulnar nerve. However, if the etiology is unknown, the present results of investigation require reserve towards operative therapy.  相似文献   
997.
Stomatological examination was carried out on 173 patients with schizophrenia (IKK-Nr. 295). It was observed that this group of patients showed a diminished dental and oral care in comparison to the average population of the same region. The close cooperation of dentists with the institutions for chronic patients will be as prophylactic measure in favour of the patients encouraged.  相似文献   
998.
The influence in 8 of our patients with ophthalmic migraine of photic driving with sine-like flashing lights on EEG background activity was checked and the visually evoked potentials following the application of diffused simple light stimuli were analyzed using the recovery cycle technique. The results indicate a slightly increased tonic activity of the structures of the mesencephalic formatio reticularis, such as may be produced by slight functional disturbances. Some vegetative secondary symptoms of migraine attacks and some of the changes in EEG observed in patients with ophthalmic migraine are explicable by such an abnormality.  相似文献   
999.
Starting from particularities in rehabilitation of neurological patients and by means of special criterions, the authors report on their own experiences in organizing occupational therapy in the neurologic department of a Medical Academy. Beside the requisite of a "therapy maintaining and restoring function", problems of resistance to stress and condition of the patient play a substantial part. Operational therapy within the group-specific situation provides necessary social communication to the neurologic patient, too.  相似文献   
1000.
The dipeptidyl-peptidase activity of 650 liquores cerebrospinalis was obtained by means of the substrate Gly-Pro-NHNp (Gly-Pro-4-nitroanilid) at pHs of 5.5 and 7.4. In comparison with a reference collective, the suitability of the method as a supplementary liquor parameter in neurological psychiatric diagnosis was examined. The introduction of the measurement at pH 7.4 can be particularly recommended for the distinguishing of bacterial and nonbacterial meningitis.  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