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   11959篇
  免费   321篇
  国内免费   3篇
  2021年   99篇
  2020年   137篇
  2019年   124篇
  2018年   299篇
  2017年   275篇
  2016年   396篇
  2015年   254篇
  2014年   228篇
  2013年   781篇
  2012年   588篇
  2011年   606篇
  2010年   245篇
  2009年   241篇
  2008年   346篇
  2007年   356篇
  2006年   313篇
  2005年   1576篇
  2004年   911篇
  2003年   701篇
  2002年   404篇
  2001年   162篇
  2000年   105篇
  1999年   151篇
  1998年   120篇
  1997年   116篇
  1996年   99篇
  1995年   85篇
  1994年   93篇
  1993年   87篇
  1992年   120篇
  1991年   126篇
  1990年   133篇
  1989年   102篇
  1988年   78篇
  1987年   100篇
  1986年   101篇
  1985年   105篇
  1984年   96篇
  1983年   95篇
  1982年   72篇
  1981年   79篇
  1980年   69篇
  1979年   97篇
  1978年   80篇
  1977年   80篇
  1976年   74篇
  1975年   86篇
  1974年   93篇
  1973年   69篇
  1971年   59篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
131.
132.
The somatic and psychosocial development of 80 subjects with manifest affective-phasic psychoses is studied retrospectively and compared with that of an identically sized control group consisting of neuropsychiatrically healthy subjects. Statistically significant differences were found particularly in the answers to questions dealing with social situation and social adaptability. Achievement at school and vocational qualifications were lower among the parents of the patients than among those of the healthy subjects. Characteristic features of the patients' childhood and adolescence were transient depression, often for no apparent cause, and maladaption, and vocational wishes were fulfilled less often than among the controls. The patients experienced greater difficulty in settling in to a new group due to their contact difficulties.  相似文献   
133.
By 48 patients with Wilson's disease the brainstem acoustic evoked potentials were stated. There were 35 pathological findings (73%), 13 were normal (27%). The waves, determined by the middle and upper brainstem (Pons and Mesencephalon) showed most of all pathological changes. Those patients with forms of Wilson's disease called Pseudoskelerose and Pseudoparkinson showed the most pathological findings. But one could watch these findings by about 30% of patients in preclinical stage. This method can possibly be used for early detection of disorders of brainstem functions and in the same way it can be used for control of treatment by patients in preclinical stage.  相似文献   
134.
Animal Cognition - Exploring new and unfamiliar environments is critical for survival, providing information on food, shelter, mates, and sources of danger. The open field paradigm is commonly used...  相似文献   
135.
Cultures responded to the COVID-19 pandemic differently. We investigated cultural differences in mental health during the pandemic. We found regional differences in people's reports of anxiety in China over two years from 2020 to 2021 (N = 1186). People in areas with a history of rice farming reported more anxiety than people in wheat-farming areas. Next, we explored more proximal mechanisms that could help link the distal, historical factor of rice farming to people's modern experience of anxiety. Rice areas scored higher on collectivism and tight social norms than wheat areas, and collectivism, rather than norm tightness, mediated the rice-anxiety relationship. These findings advance our understanding of the distal sources of cultural differences, the proximal mechanisms, and mental health problems during the pandemics.  相似文献   
136.
137.
138.
139.
140.
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