全文获取类型
收费全文 | 15996篇 |
免费 | 219篇 |
专业分类
各国政治 | 677篇 |
工人农民 | 1297篇 |
世界政治 | 839篇 |
外交国际关系 | 702篇 |
法律 | 8856篇 |
中国共产党 | 1篇 |
中国政治 | 49篇 |
政治理论 | 3732篇 |
综合类 | 62篇 |
出版年
2023年 | 46篇 |
2021年 | 57篇 |
2020年 | 116篇 |
2019年 | 132篇 |
2018年 | 1433篇 |
2017年 | 1377篇 |
2016年 | 1217篇 |
2015年 | 203篇 |
2014年 | 190篇 |
2013年 | 1018篇 |
2012年 | 374篇 |
2011年 | 1111篇 |
2010年 | 1148篇 |
2009年 | 781篇 |
2008年 | 963篇 |
2007年 | 909篇 |
2006年 | 221篇 |
2005年 | 249篇 |
2004年 | 371篇 |
2003年 | 333篇 |
2002年 | 200篇 |
2001年 | 275篇 |
2000年 | 274篇 |
1999年 | 217篇 |
1998年 | 130篇 |
1997年 | 125篇 |
1996年 | 117篇 |
1995年 | 135篇 |
1994年 | 126篇 |
1993年 | 98篇 |
1992年 | 147篇 |
1991年 | 153篇 |
1990年 | 158篇 |
1989年 | 160篇 |
1988年 | 168篇 |
1987年 | 165篇 |
1986年 | 150篇 |
1985年 | 121篇 |
1984年 | 114篇 |
1983年 | 109篇 |
1982年 | 88篇 |
1981年 | 66篇 |
1980年 | 67篇 |
1979年 | 73篇 |
1978年 | 65篇 |
1977年 | 46篇 |
1976年 | 46篇 |
1975年 | 35篇 |
1974年 | 59篇 |
1973年 | 36篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
81.
82.
On the one hand the following case demonstrates the problems of finding a dead body in the bathroom and on the other hand the importance of postmortem x-ray examinations. The corpse of an 65-year-old woman was discovered in her bath tub. At the body's feet there was a hair dryer. Investigations concerning murder were negative, circumstances appeared to be unsuspicious. That was why a postmortem examination was not performed. -4 years later murder had to be considered. After manual strangling the deceased and the hair dryer were layed into the bath tub. The corpse was exhumed and taken to a forensic autopsy. It was found that the hyoid bone and the superior horn of the thyroid cartilage were both fractured on the right. Damages caused by the preparation itself were excluded by using serial roentgenographs. These observations in combination with histological findings and the results of further investigations convincingly supported the suspicion of strangling by hand. 相似文献
83.
Peter Rutland 《欧亚研究》1994,46(7):1109-1131
84.
Dilutions of 100 serum samples of various GM phenotypes were dotted onto a nitrocellulose membrane. The serum dot-blots were detected with peroxidase-labeled anti-G3M T monoclonal antibody (anti-G3M T MAb). Up to a 1 : 256 dilution could be G3M T-typed correctly. By use of anti-G3M T MAb and peroxidase-labeled anti-mouse IgG or the biotin-avidin system instead of use of labeled anti-G3M T MAb, up to a 1 : 512 or 1 : 1024, respectively, dilution was typable. As with previous work with G3M G MAb, the dot immunobinding (DIB) method for G3M T typing was found very simple and practical. 相似文献
85.
86.
Postmortem changes in sulfide concentrations in body tissues were examined in autopsied rats exposed to hydrogen sulfide concentrations of 550 to 650 ppm, and in nonexposed rats and humans. Analyses were made by gas chromatography, following an extractive alkylation. Sulfide concentrations in the blood, liver, and kidneys of rats increased in both the exposed and nonexposed groups, depending on the lapse of time after death. On the other hand, the lung, brain, and muscle showed little or no change in sulfide concentration with elapse of time after death. The data obtained from human tissues were almost the same as those for rats, except data for blood, in which no or little increase of sulfide was observed. 相似文献
87.
88.
89.
Presented in this paper are the initial results involving the use of the nose or outer ear as temperature measurement sites to determine the postmortem period of the human corpse. Simple mathematical models for both sites are developed based on cooling curves of five corpses. Analysis of errors between actual and calculated postmortem intervals suggest that in its present form, the described methods would not be suitable for use in accurately determining the time since death of human corpses. 相似文献
90.