全文获取类型
收费全文 | 902篇 |
免费 | 1篇 |
专业分类
化学工业 | 5篇 |
建筑科学 | 2篇 |
轻工业 | 3篇 |
无线电 | 1篇 |
一般工业技术 | 1篇 |
冶金工业 | 891篇 |
出版年
2016年 | 1篇 |
2011年 | 3篇 |
2010年 | 1篇 |
2007年 | 1篇 |
2005年 | 1篇 |
2003年 | 4篇 |
2000年 | 2篇 |
1999年 | 36篇 |
1998年 | 307篇 |
1997年 | 186篇 |
1996年 | 89篇 |
1995年 | 59篇 |
1994年 | 37篇 |
1993年 | 61篇 |
1992年 | 6篇 |
1991年 | 8篇 |
1990年 | 4篇 |
1989年 | 4篇 |
1988年 | 9篇 |
1987年 | 3篇 |
1986年 | 3篇 |
1985年 | 5篇 |
1983年 | 1篇 |
1982年 | 5篇 |
1981年 | 4篇 |
1980年 | 3篇 |
1978年 | 3篇 |
1977年 | 15篇 |
1976年 | 40篇 |
1975年 | 1篇 |
1955年 | 1篇 |
排序方式: 共有903条查询结果,搜索用时 0 毫秒
901.
902.
A working model for the histogenesis of carcinoma of the uterine cervix is summarized in Table I. The inclusion of squamous metaplasia in this chart does not imply that this reaction falls into the spectrum of cervical neoplasia or is necessarily an antecedent to neoplasia. It does simply imply that the carcinogenic event or events apparently occur in or involve an epithelium that is indistinguishable from squamous metaplasia. The chart intentionally implies that the lesions mentioned are not separate diseases but arbitrary points in the spectrum of cervical neoplasia. It must be emphasized that one stage does not necessarily progress to the next and that at any stage up to indisputable cancer the changes may regress, persist or progress. The careful evaluation of histologic material from the uterine cervix will permit the pathologist to exclude those epithelial abnormalities which are not a part of the spectrum of cervical neoplasia and allow him or her to place the patient with cervical neoplasia at the proper stage in the development of the process. With this information the clinician can then intelligently plan appropriate therapy. 相似文献
903.
SF Landau 《Canadian Metallurgical Quarterly》1976,44(5):745-759
Investigated the temporal orientation of delinquents and nondelinquents while adequately controlling institutionalization. Four groups of 17-25 yr old males ( N = 183) were selected: institutionalized delinquents (prison inmates), institutionalized nondelinquents (soldiers), noninstitutionalized delinquents (delinquents on probation), and noninstitutionalized nondelinquents (vocational students). Findings support most of the hypotheses: Although all Ss were basically future oriented, institutionalized Ss were more present oriented than their noninstitutionalized counterparts. As the prisoner approached release, there was a decrease in the salience of the present and an increase in the salience of the future in his life space. Delinquents (both in and out of prison) perceived the past as more negative and the future as more positive than did nondelinquents. Institutionalized Ss perceived the present as more negative than their noninstitutionalized counterparts. The affective attitudes of the nondelinquents toward the past, present, and future were much more balanced and realistic than that of the delinquents. (57 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献