全文获取类型
收费全文 | 37770篇 |
免费 | 1492篇 |
国内免费 | 17篇 |
专业分类
39279篇 |
出版年
2020年 | 442篇 |
2019年 | 550篇 |
2018年 | 735篇 |
2017年 | 816篇 |
2016年 | 820篇 |
2015年 | 562篇 |
2014年 | 696篇 |
2013年 | 2955篇 |
2012年 | 1276篇 |
2011年 | 1270篇 |
2010年 | 816篇 |
2009年 | 773篇 |
2008年 | 1133篇 |
2007年 | 1149篇 |
2006年 | 1022篇 |
2005年 | 898篇 |
2004年 | 848篇 |
2003年 | 804篇 |
2002年 | 820篇 |
2001年 | 1169篇 |
2000年 | 1116篇 |
1999年 | 873篇 |
1998年 | 381篇 |
1997年 | 372篇 |
1996年 | 347篇 |
1995年 | 357篇 |
1993年 | 343篇 |
1992年 | 737篇 |
1991年 | 645篇 |
1990年 | 701篇 |
1989年 | 608篇 |
1988年 | 643篇 |
1987年 | 598篇 |
1986年 | 606篇 |
1985年 | 547篇 |
1984年 | 507篇 |
1983年 | 483篇 |
1982年 | 344篇 |
1979年 | 572篇 |
1978年 | 396篇 |
1975年 | 453篇 |
1974年 | 493篇 |
1973年 | 530篇 |
1972年 | 398篇 |
1971年 | 390篇 |
1970年 | 352篇 |
1969年 | 405篇 |
1968年 | 471篇 |
1967年 | 432篇 |
1966年 | 359篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
131.
132.
This research investigated the buffering role of social support in the relationship of work load to both tension-anxiety and coping for police radio dispatchers ( N = 60). Each dispatcher was observed throughout an entire 8-hour work shift by a trained observer. Objective load consisted of the hourly rate of incoming telephone calls, police radio transmissions, and face-to-face or written communications from superiors, co-workers, and others. At the end of each shift, measures were taken of dispatchers' perceived load, felt tension-anxiety, and coping actions. Hierarchical regression revealed that support from superiors moderated the effects of both objective and perceived loads; no main effects of support were found. Statistically significant interactions confirmed the hypothesized buffering role of support: under high perceived load, dispatchers with high social support engaged in more coping actions and felt less tension-anxiety than did low-support dispatchers. No differences were found when perceived load was low. Support also buffered effects of objective load on tension-anxiety but not on coping. 相似文献
133.
134.
Visual cognitive differences between hearing (N = 16) and deaf (N = 32) high-school and middle-school students were studied. Visual tasks were presented on a microcomputer and response latencies were collected. Significant differences were noted between the deaf and normal groups but not between total communication deaf and oral deaf students. These differences support the hypothesis that deaf students prefer a visual cognitive strategy. Implications for educating the deaf are discussed. 相似文献
135.
Midlife depression and the "empty nest" syndrome in Indian women 总被引:2,自引:0,他引:2
A L Pillay 《Psychological reports》1988,63(2):591-594
136.
137.
138.
139.
Stress, locus of control, and achievement of high school seniors 总被引:1,自引:0,他引:1
140.