全文获取类型
收费全文 | 19646篇 |
免费 | 270篇 |
国内免费 | 109篇 |
专业分类
教育 | 13502篇 |
科学研究 | 2647篇 |
各国文化 | 119篇 |
体育 | 1388篇 |
综合类 | 221篇 |
文化理论 | 259篇 |
信息传播 | 1889篇 |
出版年
2022年 | 152篇 |
2021年 | 266篇 |
2020年 | 293篇 |
2019年 | 336篇 |
2018年 | 1087篇 |
2017年 | 1100篇 |
2016年 | 856篇 |
2015年 | 425篇 |
2014年 | 557篇 |
2013年 | 2396篇 |
2012年 | 621篇 |
2011年 | 843篇 |
2010年 | 777篇 |
2009年 | 620篇 |
2008年 | 684篇 |
2007年 | 810篇 |
2006年 | 453篇 |
2005年 | 458篇 |
2004年 | 485篇 |
2003年 | 370篇 |
2002年 | 330篇 |
2001年 | 373篇 |
2000年 | 395篇 |
1999年 | 271篇 |
1998年 | 148篇 |
1997年 | 198篇 |
1996年 | 180篇 |
1995年 | 121篇 |
1994年 | 137篇 |
1993年 | 115篇 |
1992年 | 198篇 |
1991年 | 184篇 |
1990年 | 214篇 |
1989年 | 212篇 |
1988年 | 180篇 |
1987年 | 192篇 |
1986年 | 173篇 |
1985年 | 207篇 |
1984年 | 151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 | 90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
911.
912.
913.
914.
Restructuring support staff classification levels for academic health sciences library positions 总被引:1,自引:0,他引:1
J C McCann S E Davis D J Trainor D K Waller R B Greenblatt 《Bulletin of the Medical Library Association》1990,78(3):293-301
Nonprofessional library support staff traditionally hold what are considered to be low-paying, nonchallenging positions. These negative factors make retaining creative and productive employees difficult. This article outlines the approach taken at the Medical College of Georgia's Robert B. Greenblatt, M.D. Library to devise a structure of library staff positions that becomes progressively more demanding. A new nine-level Library Staff Classification Plan resulted. This plan also enables and encourages employees to acquire more skills and to accept more responsibility in order to qualify for higher-level library positions or to advance their present position to receive comparable rewards. The plan expresses the level of responsibilities expected, the employee qualifications desired, and lists representative duties across the spectrum of typical library tasks. 相似文献
915.
916.
917.
918.
Caroline Joan S. Picart 《传播与批判/文化研究》2013,10(4):335-354
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
919.
920.
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