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   13377篇
  免费   185篇
  国内免费   11篇
教育   9212篇
科学研究   1677篇
各国文化   113篇
体育   988篇
综合类   19篇
文化理论   160篇
信息传播   1404篇
  2022年   95篇
  2021年   134篇
  2020年   206篇
  2019年   271篇
  2018年   393篇
  2017年   418篇
  2016年   384篇
  2015年   256篇
  2014年   370篇
  2013年   2162篇
  2012年   325篇
  2011年   305篇
  2010年   296篇
  2009年   262篇
  2008年   276篇
  2007年   286篇
  2006年   273篇
  2005年   233篇
  2004年   256篇
  2003年   224篇
  2002年   236篇
  2001年   313篇
  2000年   332篇
  1999年   255篇
  1998年   140篇
  1997年   180篇
  1996年   176篇
  1995年   119篇
  1994年   131篇
  1993年   115篇
  1992年   198篇
  1991年   182篇
  1990年   213篇
  1989年   211篇
  1988年   180篇
  1987年   192篇
  1986年   173篇
  1985年   208篇
  1984年   150篇
  1983年   131篇
  1982年   124篇
  1981年   109篇
  1980年   112篇
  1979年   174篇
  1978年   130篇
  1977年   113篇
  1976年   89篇
  1975年   92篇
  1974年   94篇
  1973年   91篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
Do infants see emotional expressions in static faces?   总被引:2,自引:0,他引:2  
To determine whether young infants discriminate photographs of different emotions on an affect-relevant basis or on the basis of isolated features unrelated to emotion, groups of 17-, 23-, and 29-week-olds were habituated to slides of 8 women posing either Toothy Angry, Nontoothy Angry, or Nontoothy Smiling facial expressions and were then shown 2 new women in the familiarized expression and in a novel Toothy Smiling expression. At all 3 ages, recovery to the novel Toothy Smiling faces occurred only after habituation to Nontoothy faces (whether smiling or angry), not after habituation to Toothy Angry faces, indicating that infants had been responsive to nonspecific features of the photographs (presence or absence of bared teeth) rather than to affectively relevant configurations of features. In a second experiment, 2 older age groups (35 and 41 weeks) also proved to be insensitive to affect-related aspects of still faces, though more so for angry than for happy expressions. It is suggested that the young infant's difficulty in extracting emotional information from static stimuli may be attributable to the absence of the critical invariants (dynamic, multimodally specified) that characterize naturalistic expressions of emotion.  相似文献   
93.
A group of 633 college students at a large midwestern public university was asked fifteen questions pertaining to personal long-term course planning. The results indicated that only 48% of the students sketched out a tentative listing of at least two courses per term for one or more subsequent semesters when first planning courses for the current semester. Long-range planning was positively correlated with the number of years students had already spent in college and with students' perception of the following factors: course planning utility, degree of certainty about pursuing one's current first choice of career, and degree of commitment in using college coursework as a means of achieving a career goal (all p < 0.001). Long-range planning was negatively correlated with the anticipation of a possible change in academic interests. Such planning was not significantly correlated with students' entrance examination aptitude scores or grade point averages. Thus, students' long-range planning of courses was associated more strongly with career commitment than with recent academic performance or aptitude.  相似文献   
94.
95.
This study evaluated the emotional and marital adjustment of hearing parents of hearing-impaired youths. Participants included mothers and fathers of hearing-impaired youths and mothers and fathers of hearing youths. In contrast with expectations based on clinical impressions reported in the literature, parents of hearing-impaired youths reported less symptomatology than did parents of hearing youths, and there were no differences in the marital satisfaction of parents in intact families. Moreover, parental adjustment was not associated with the duration of time since the child was diagnosed as hearing impaired. In addition, hierarchical multiple regression analyses revealed that family cohesion was associated with low maternal symptomatology and high marital satisfaction for both spouses. For mothers, low symptomatology was associated with low stress and female gender of child; high marital satisfaction also was linked with a less severe degree of hearing loss in the youth.  相似文献   
96.
Learning disabilities in alcohol-dependent adults: a preliminary study   总被引:1,自引:0,他引:1  
To determine if neuropsychological deficits, known to precede alcohol use in those genetically predisposed to alcoholism, were present in an alcoholic population, 25 male alcoholics (mean age 41.1) were interviewed concerning alcohol usage, educational difficulties in elementary school, and family history of alcoholism. Using a regression table, discrepancies between current IQ on the Wechsler Adult Intelligence Scale-Revised (WAIS-R) (Wechsler, 1981) and achievement on the Woodcock-Johnson Psycho-Educational Battery (WJB) (Woodcock & Johnson, 1977) were calculated to determine present learning status. Forty percent of the alcoholics were found to have had special education, remedial services, or repeated grade failure concurrent with a familial history of alcoholism and current discrepancies indicative of learning disability. There were no significant differences on intelligence, years of drinking, or mean grades completed in school between this group and the rest of the subjects who did not receive services in school. Conclusions were that childhood learning disorders may be related to the development of alcoholism, particularly when alcoholism is in the family, and that special educators have a role to play in the prevention and treatment of alcoholism.  相似文献   
97.
98.
Collaboration between subject matter specialists, computer programmers and educational technologists has resulted in the production of POPTRAN, a computer assisted learning package designed to teach the basic concepts of population studies. Its evaluation in developing countries, with both naive and specialist users, and subsequent revision, has produced a package of both academic quality and teaching effectiveness.  相似文献   
99.
100.
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