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   21875篇
  免费   312篇
  国内免费   29篇
教育   15025篇
科学研究   2605篇
各国文化   202篇
体育   1885篇
综合类   22篇
文化理论   250篇
信息传播   2227篇
  2021年   199篇
  2020年   313篇
  2019年   434篇
  2018年   618篇
  2017年   652篇
  2016年   571篇
  2015年   389篇
  2014年   553篇
  2013年   3766篇
  2012年   503篇
  2011年   488篇
  2010年   456篇
  2009年   408篇
  2008年   430篇
  2007年   466篇
  2006年   420篇
  2005年   370篇
  2004年   389篇
  2003年   376篇
  2002年   370篇
  2001年   447篇
  2000年   474篇
  1999年   385篇
  1998年   208篇
  1997年   252篇
  1996年   264篇
  1995年   190篇
  1994年   222篇
  1993年   199篇
  1992年   336篇
  1991年   312篇
  1990年   335篇
  1989年   328篇
  1988年   281篇
  1987年   292篇
  1986年   291篇
  1985年   332篇
  1984年   248篇
  1983年   246篇
  1982年   223篇
  1981年   206篇
  1980年   199篇
  1979年   329篇
  1978年   229篇
  1977年   215篇
  1976年   192篇
  1975年   166篇
  1974年   175篇
  1973年   149篇
  1971年   153篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
901.
Alien Resurrection (1997) heightens the movements across dark humor and horror, and enables more pronounced and complex conjunctions across the three types of shadows put forward by Rushing/Frentz and Picart, particularly in the case of the monstrous female characters like Ripley and Call. These characters bisociate the realms of first shadow (female bodies), second shadow (products of technology), and third shadow (fearsome female freedom fighters). Nevertheless, both live—a rarity among Frankensteinian cinemyths. Alien Resurrection enables us to glimpse, through a glass darkly, other ways in which the gendered and raced complexities of the Frankenstein cinematic myth may be traced.  相似文献   
902.
903.
Recently, March, Hooper, and Baum (1977) described a sample of 99 nonstudent elders in terms of their demographic characteristics and their attitudes toward lifelong learning. The sample was found to be well‐educated (mean years of education = 13.61, SD = 9.43), active in the community, well‐read, and fairly affluent. The majority demonstrated a quite open attitude toward the appropriateness of formal education in old age, but also felt that learning can be acquired outside the classroom: “living is learning.”

The present study was undertaken to similarly describe a sample of elderly people enrolled in the University of Wisconsin guest student program, and to contrast these respondents with those in the earlier study. The student group was found to be significantly younger than the nonstudent group (mean = 70.78, SD = 7.21 vs. mean = 74.69, SD = 8.45; t = 2.87, p < .001). Although there is no difference in the mean years of education of the two groups, there is significantly greater variability in years of education in the student group (F = 10.98, p < .001), with 50.4% of the nonstudent group versus 21.6% of the student group having 12 years of education or less. Additionally, it was found that only 10 of the 139 student respondents did not have either personal or vicarious personal (through familial significant others) experience with higher education in youth.

The respondents’ stated preference for class format and student group age is also summarized, and some implications for educational gerontology are discussed.  相似文献   
904.
905.
906.
907.
Exploratory activity was examined in 4 young baboons with the aim of investigating the type of spatial coding (purely geometric and/or by taking into account the identity of the object) used for the configuration of objects. Animals were individually tested in an outdoor enclosure for their exploratory reactions (contact time and order of spontaneous visits) to changes brought about to a configuration of different objects. Two kinds of spatial changes were made: a modification (1) of the shape of the configuration (by displacement of one object) and (2) of the spatial arrangement without changing the initial shape (exchanging the location of two objects). In the second experiment, the effect of a spatial modification of the global geometry constituted by four identical objects was investigated. Finally, in the third experiment, a substitution of a familiar object with a novel one was performed without changing the objects’ configuration. The baboons strongly reacted to geometrical modifications of the configuration. In contrast, they were less sensitive to modifications of local features that did not affect the initial spatial configuration. Analyses of spontaneous exploratory activities revealed two types of exploratory strategies (cyclic and back-and-forth). These data are discussed in relation to (1) the distinction between the encoding of geometric versus local spatial features and (2) the spatial function of exploratory activity.  相似文献   
908.
909.
910.
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