全文获取类型
收费全文 | 10060篇 |
免费 | 124篇 |
国内免费 | 122篇 |
专业分类
教育 | 6393篇 |
科学研究 | 1235篇 |
各国文化 | 89篇 |
体育 | 1630篇 |
综合类 | 19篇 |
文化理论 | 66篇 |
信息传播 | 874篇 |
出版年
2021年 | 79篇 |
2020年 | 154篇 |
2019年 | 198篇 |
2018年 | 279篇 |
2017年 | 279篇 |
2016年 | 261篇 |
2015年 | 182篇 |
2014年 | 233篇 |
2013年 | 1553篇 |
2012年 | 212篇 |
2011年 | 223篇 |
2010年 | 190篇 |
2009年 | 208篇 |
2008年 | 189篇 |
2007年 | 180篇 |
2006年 | 198篇 |
2005年 | 170篇 |
2004年 | 379篇 |
2003年 | 349篇 |
2002年 | 335篇 |
2001年 | 400篇 |
2000年 | 240篇 |
1999年 | 162篇 |
1998年 | 106篇 |
1997年 | 97篇 |
1996年 | 96篇 |
1995年 | 107篇 |
1994年 | 101篇 |
1993年 | 77篇 |
1992年 | 152篇 |
1991年 | 118篇 |
1990年 | 135篇 |
1989年 | 149篇 |
1988年 | 110篇 |
1987年 | 129篇 |
1986年 | 120篇 |
1985年 | 135篇 |
1984年 | 119篇 |
1983年 | 123篇 |
1982年 | 96篇 |
1981年 | 81篇 |
1980年 | 90篇 |
1979年 | 134篇 |
1978年 | 87篇 |
1977年 | 72篇 |
1976年 | 89篇 |
1975年 | 65篇 |
1974年 | 72篇 |
1973年 | 68篇 |
1971年 | 66篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
961.
962.
963.
Changes are being made in the content of presentday electrical engineering curriculums which require a fresh, modern outlook with regard to techniques pertaining to problem assignments and laboratory projects. Course content is being upgraded and broadened in the direction of a fundamental analytical approach. The recent revision of the electrical engineering curriculum at The Pennsylvania State University, University Park, includes liberal use of an ac network calculator in all electrical engineering options, which are outlined in this paper. The uniqueness of the ac network calculator at the University is that it is used exclusively for educational purposes, especially in the Department of Electrical Engineering. This paper discusses the "when, where, and how" of the utilization of this facility in the electrical engineering curriculum. 相似文献
964.
965.
966.
967.
968.
Robert P. Brady 《Counselor Education & Supervision》1976,16(1):74-76
In recent years it has been estimated that from 30 percent to 50 percent of the medical complaints brought to the family or general practice physician are functional in nature and may be psychosocial in origin (Harmon, Masuda & Holmes 1970). While chemotherapy may be appropriate for the patient with acute situational anxiety and psychiatric consultation may be appropriate for the severely neurotic or psychotic patient, the family practice physician has few remedies for the patient with chronic aches and pains, housewife syndrome, middle-age depression, businessman's fatigue, and a host of other quasimedical complaints. 相似文献
969.
970.
Martin P. Knowlton 《Innovative Higher Education》1980,5(1):65-70
This paper describes the philosophy of ELDERHOSTEL, an organization which began in 1975 with five colleges in New Hampshire offering a total of 15 weeks of higher education programs for persons 60 years of age and older. By the summer of 1979, more than 500 weeks of ELDERHOSTEL programs were being offered at 235 college and university campuses in 37 states.Martin P. Knowlton is Director of the New England Center for Social Invention and a founder of ELDERHOSTEL. 相似文献