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   28468篇
  免费   1123篇
  国内免费   13篇
  2020年   312篇
  2019年   337篇
  2018年   480篇
  2017年   571篇
  2016年   565篇
  2015年   381篇
  2014年   476篇
  2013年   2360篇
  2012年   888篇
  2011年   968篇
  2010年   598篇
  2009年   581篇
  2008年   813篇
  2007年   815篇
  2006年   718篇
  2005年   674篇
  2004年   660篇
  2003年   595篇
  2002年   664篇
  2001年   825篇
  2000年   854篇
  1999年   652篇
  1998年   344篇
  1997年   297篇
  1996年   291篇
  1992年   524篇
  1991年   466篇
  1990年   491篇
  1989年   462篇
  1988年   443篇
  1987年   437篇
  1986年   447篇
  1985年   482篇
  1984年   390篇
  1983年   349篇
  1982年   301篇
  1981年   279篇
  1979年   434篇
  1978年   318篇
  1977年   314篇
  1975年   381篇
  1974年   406篇
  1973年   391篇
  1972年   357篇
  1971年   309篇
  1970年   273篇
  1969年   334篇
  1968年   374篇
  1967年   328篇
  1966年   336篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
We examined the effects of acute psychological stress on lymphocyte proliferation and circulating levels of interleukin-1 and -2. Healthy men were exposed to two viewings of a gruesome surgery film and were asked to recall details of the film twice during a 30-min period. These subjects were compared to a nonstress control group. Lymphocyte proliferation to the mitogen concanavalin A (Con A; 5 micrograms/ml) was decreased during and after exposure to the stressor when compared to the control group. This decrease was more pronounced in subjects exhibiting greater blood pressure reactivity while viewing the film than in subjects showing smaller blood pressure responses. None of the other immunological measures was significantly affected by the stressor. Cortisol was not correlated with lymphocyte responsiveness. Possible explanations for these results and implications for further research are discussed.  相似文献   
72.
73.
74.
75.
76.
77.
78.
This study examined the effect of high and low communication apprehension in conjunction with social and personal settings upon verbal behavior. Step wise multiple discriminant analysis of the data indicated a linear combination of language indices (number of syllables, Noun-Verb/Adjective-Adverb ratio, and phrase repetitions) which discriminated between the high apprehensive-personal setting group and the remaining three groups. Results are discussed relative to theoretical projections and the potential for sensitivity toward communication behavior being operative within the communication apprehension framework.  相似文献   
79.
A comparison of two measures of egocentrism   总被引:1,自引:0,他引:1  
This study examined the relationship between two prominent measures of egocentrism, Enright's Adolescent Egocentrism Scale (AES) and Elkind's Imaginary Audience Scale (IAS), in a sample of 458 adolescents, between 10 and 15 years old. Both correlational and factor analyses indicated that the two measures assess distinctly different phenomena. As predicted, IAS scores were correlated with self-reported levels of shyness, nervousness, and social skills. These results provide partial evidence for the validity of the IAS as a measure of self-consciousness, though not necessarily egocentrism per se. The validity of the AES was not examined.  相似文献   
80.
In this study, we examined factors associated with relapse and maintenance following a self-management training course. Thirty-five community professionals participated in a 3-week (30-hr) graduate-level extension course in self-management, which included a self-modification project. Results at a 10-week follow-up showed that end-of-class self-efficacy and outcome expectancy correctly classified over 80% of those who maintained gains in their projects versus those who relapsed. The professionals in the relapsed group also reported significantly more difficulty with anticipated high-risk situations than did those in the maintenance group.  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