全文获取类型
收费全文 | 42365篇 |
免费 | 1663篇 |
国内免费 | 17篇 |
出版年
2020年 | 421篇 |
2019年 | 465篇 |
2018年 | 682篇 |
2017年 | 698篇 |
2016年 | 733篇 |
2015年 | 547篇 |
2014年 | 705篇 |
2013年 | 3240篇 |
2012年 | 1224篇 |
2011年 | 1220篇 |
2010年 | 813篇 |
2009年 | 772篇 |
2008年 | 1111篇 |
2007年 | 1109篇 |
2006年 | 1013篇 |
2005年 | 895篇 |
2004年 | 878篇 |
2003年 | 819篇 |
2002年 | 844篇 |
2001年 | 1286篇 |
2000年 | 1276篇 |
1999年 | 975篇 |
1998年 | 463篇 |
1997年 | 461篇 |
1996年 | 448篇 |
1992年 | 833篇 |
1991年 | 776篇 |
1990年 | 784篇 |
1989年 | 698篇 |
1988年 | 712篇 |
1987年 | 677篇 |
1986年 | 706篇 |
1985年 | 694篇 |
1984年 | 625篇 |
1983年 | 550篇 |
1982年 | 420篇 |
1979年 | 617篇 |
1978年 | 517篇 |
1977年 | 437篇 |
1976年 | 442篇 |
1975年 | 551篇 |
1974年 | 667篇 |
1973年 | 690篇 |
1972年 | 519篇 |
1971年 | 526篇 |
1970年 | 475篇 |
1969年 | 529篇 |
1968年 | 635篇 |
1967年 | 579篇 |
1966年 | 561篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
161.
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
162.
B A Maher T C Manschreck C C Weisstein M L Schneyer R Okunieff 《Perceptual and motor skills》1988,67(3):911-918
This report examines two methodologic concerns pertaining to use of the cloze procedure in studying the predictability of schizophrenic speech, scoring criteria and raters' education (at or below college level). We find that two strategies for scoring the predictions of raters, one requiring the exact word, the other permitting a reasonable synonym, do not appear to differ in distinguishing groups of patients. The accuracy of raters' guessing is, however, correlated with raters' education: the more educated the rater, the more accurate the guessing. Thought-disordered schizophrenic speech is significantly less predictable than that of nonthought-disordered schizophrenics and normal controls when scored by less educated raters. These differences diminish when more highly educated raters are used. We conclude that raters' education can influence the sensitivity of cloze analysis. 相似文献
163.
Individuals with stronger sex-role identities may be expected to show greater conformity to sex-typed behaviors. Proceeding from this assumption, the sex-role status and sex of students using different styles of carrying books were compared. This study also examined whether over-all hand preference or age were related to carrying styles or sex-role status. Subjects completed a questionnaire comprised of the 24-item Personal Attributes Questionnaire of Spence and Helmreich, a 6-item scale of hand preference and a self-rating of sex-role identity. Afterwards, each subject's carrying style was covertly observed and recorded. Most subjects carried their materials in a sex-typical way or in book bags (for which no sex-typed carrying styles were discovered). As in previous studies, men in this study scored higher than women on masculinity and androgyny and lower on femininity. Hand preference was not related to sex-role status. Carrying style was not significantly correlated with any of the predictor variables for men, perhaps because almost no variance in carrying style was observed among them. Women who used masculine carrying styles tended to be older, have greater instrumentality, and a more masculine identity. 相似文献
164.
E Schier T Yecunnoamlack T Tegegne 《Psychiatrie, Neurologie, und medizinische Psychologie》1988,40(8):490-499
Of 1240 first-time consultations in the neuropsychiatric clinic of the Gondar College of Medical Sciences in an eleven-month period during 1985 and 1986, 152 patients came seeking relief from seizures. This paper deals with the origins and background of diagnostic, differential diagnostic, and therapeutic problems, and with problems of social rehabilitation. While in such a tradition-bound society certain hypotheses continue to have an unfavorable effect, there are unmistakable signs of positive change against a background of rapid social change. Conclusions are drawn for the better management of epileptic patients in developing countries. 相似文献
165.
166.
167.
168.
S Martin K Housley H Mccoy P Greenhouse F Stigger M A Kenney S Shoffner V Fu M Korslund F G Ercanli-Huffman 《Perceptual and motor skills》1988,67(3):879-884
The Rosenberg Self-esteem Scale was administered to 550 14- and 16-yr.-old (+/- 6 mo.) girls. Self-esteem scores were categorized by weight and weight by height. Scores on the Quetelet Index for obesity were correlated with self-esteem scores. Mean self-esteem of the low- and middle-weight by height group was significantly higher than the mean of the high-weight by height group. In analyzing weight alone, the self-esteem of the middle-weight group was significantly higher than the self-esteem of the high-weight group. The correlation of the obesity index and self-esteem indicated that as weight increased self-esteem decreased. 相似文献
169.
S W?sser W Handrick F B Spencker W Braun 《Psychiatrie, Neurologie, und medizinische Psychologie》1988,40(2):95-101
Observations on three children with neurolisteriosis (one case of meningitis, two cases of meningoencephalitis, each Serovar 4 b), show that even after the neonatal period, listeriosis must not be ignored in the process of diagnosis and therapy. It is the bacteriological examination of the cerebrospinal fluid, together with the blood culture, and not clinical symptoms and serology that guarantee a timely diagnosis and therapy (ampicillin and gentamicin). 相似文献
170.
W von Suchodoletz W Gierow 《Psychiatrie, Neurologie, und medizinische Psychologie》1988,40(8):456-462
In the present study inquiries have been made about the changes EEG cross-correlation in mental activities is subject to. The EEG recordings were made at rest, in visual and acoustical response, when reading and in the solution of an acoustical differentiation problem. In conjunction with plain reflex processes a decline in the intrahemispherical correlation was observed. During complex-structured psycho-request situations dissimilar changes in the EEG correlation have occurred on the scalp. Between the cerebral regions functionally essential for the solution of the problems, an increase in the bio-electric correlation and between other cerebral areas a decline were registered. The findings in conclusion come to realize that the topographic EEG cross-correlation analysis is appropriate to give an insight into the present situation of cerebral functional organization. 相似文献