全文获取类型
收费全文 | 19411篇 |
免费 | 237篇 |
国内免费 | 32篇 |
专业分类
教育 | 13233篇 |
科学研究 | 1916篇 |
各国文化 | 181篇 |
体育 | 1848篇 |
综合类 | 28篇 |
文化理论 | 135篇 |
信息传播 | 2339篇 |
出版年
2021年 | 150篇 |
2020年 | 305篇 |
2019年 | 435篇 |
2018年 | 497篇 |
2017年 | 598篇 |
2016年 | 521篇 |
2015年 | 351篇 |
2014年 | 471篇 |
2013年 | 3389篇 |
2012年 | 405篇 |
2011年 | 454篇 |
2010年 | 361篇 |
2009年 | 383篇 |
2008年 | 371篇 |
2007年 | 389篇 |
2006年 | 344篇 |
2005年 | 306篇 |
2004年 | 562篇 |
2003年 | 442篇 |
2002年 | 452篇 |
2001年 | 347篇 |
2000年 | 388篇 |
1999年 | 286篇 |
1998年 | 168篇 |
1997年 | 189篇 |
1996年 | 216篇 |
1995年 | 183篇 |
1994年 | 172篇 |
1993年 | 158篇 |
1992年 | 250篇 |
1991年 | 244篇 |
1990年 | 216篇 |
1989年 | 273篇 |
1988年 | 247篇 |
1987年 | 261篇 |
1986年 | 248篇 |
1985年 | 295篇 |
1984年 | 242篇 |
1983年 | 236篇 |
1982年 | 204篇 |
1981年 | 168篇 |
1980年 | 137篇 |
1979年 | 224篇 |
1978年 | 181篇 |
1977年 | 158篇 |
1976年 | 177篇 |
1975年 | 133篇 |
1974年 | 151篇 |
1973年 | 129篇 |
1971年 | 134篇 |
排序方式: 共有10000条查询结果,搜索用时 8 毫秒
911.
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
912.
The new University of Texas Health Science Center at San Antonio Library opened in June 1983, replacing the 1968 library building. Planning a new library building provides an opportunity for the staff to rethink their philosophy of service. Of paramount concern and importance is the need to convey this philosophy to the architects. This paper describes the planning process and the building's external features, interior layouts, and accommodations for technology. Details of the move to the building are considered and various aspects of the building are reviewed. 相似文献
913.
The purpose of this study was to test the hypothesis that increased availability of blood-borne glucose would improve endurance after carbohydrate loading. A single-leg exercise model was employed, taking advantage of the fact that supercompensation of muscle glycogen occurs only in a previously exercised limb. Endurance time to exhaustion at 70% of maximal oxygen uptake (VO2 max) was determined for 11 males and three females who were then allocated to a control group or a high-carbohydrate (CHO) group. For 3 days following Test 1 the control group maintained a prescribed normal diet whilst the CHO group increased the proportion of energy derived from carbohydrate (62.1 +/- 4.3% cf. 43.9 +/- 2.0%, P less than 0.01). The endurance test was then repeated using the leg that was inactive during Test 1. Endurance time was increased on Test 2 (123.7 +/- 43.2 min cf. 98.5 +/- 21.9 min, P less than 0.05 one-tailed test) for the CHO group but not for the control group (101.8 +/- 21.7 min cf. 107.5 +/- 9.1 min, NS). There was no indication of enhanced carbohydrate metabolism during Test 2 for the CHO group but mean heart rate was lower during Test 2 than during Test 1 (145 +/- 14 beat min-1 cf. 152 +/- 12 beat min-1, P less than 0.05). These results suggest that the prior consumption of a high-carbohydrate diet improves endurance during high-intensity cycling with a limb with normal muscle glycogen concentration. 相似文献
914.
915.
D. E. Eagleson 《International journal for the advancement of counseling》1989,12(4):273-279
Nineteen years ago, funded by a Charitable Trust, based in Scotland but with Northern Ireland interests, the then Northern Ireland Council of Social Service established the Educational Guidance Service for Adults, the first Service of its kind in Europe. The Service, now a grant-aided independent organisation, has twin roles, to provide information on all kinds of learning opportunities for adults, and to offer continuing support, guidance and counselling to clients. It is increasingly involved in meeting demands from the growing number of unemployed adults and in co-operation with providers of adult education in promoting appropriate learning opportunities.
相似文献
相似文献
916.
917.
918.
919.
920.