全文获取类型
收费全文 | 7095篇 |
免费 | 184篇 |
专业分类
各国政治 | 360篇 |
工人农民 | 302篇 |
世界政治 | 557篇 |
外交国际关系 | 300篇 |
法律 | 4292篇 |
中国政治 | 55篇 |
政治理论 | 1396篇 |
综合类 | 17篇 |
出版年
2022年 | 38篇 |
2021年 | 61篇 |
2020年 | 103篇 |
2019年 | 143篇 |
2018年 | 202篇 |
2017年 | 187篇 |
2016年 | 191篇 |
2015年 | 131篇 |
2014年 | 170篇 |
2013年 | 815篇 |
2012年 | 254篇 |
2011年 | 237篇 |
2010年 | 165篇 |
2009年 | 183篇 |
2008年 | 215篇 |
2007年 | 225篇 |
2006年 | 176篇 |
2005年 | 163篇 |
2004年 | 188篇 |
2003年 | 151篇 |
2002年 | 134篇 |
2001年 | 330篇 |
2000年 | 303篇 |
1999年 | 211篇 |
1998年 | 89篇 |
1997年 | 85篇 |
1996年 | 63篇 |
1995年 | 62篇 |
1994年 | 51篇 |
1993年 | 41篇 |
1992年 | 127篇 |
1991年 | 143篇 |
1990年 | 136篇 |
1989年 | 130篇 |
1988年 | 114篇 |
1987年 | 127篇 |
1986年 | 102篇 |
1985年 | 96篇 |
1984年 | 100篇 |
1983年 | 90篇 |
1982年 | 64篇 |
1981年 | 75篇 |
1980年 | 35篇 |
1979年 | 77篇 |
1978年 | 48篇 |
1975年 | 37篇 |
1974年 | 49篇 |
1973年 | 54篇 |
1972年 | 42篇 |
1971年 | 34篇 |
排序方式: 共有7279条查询结果,搜索用时 15 毫秒
831.
K Püschel K Lieske Y Hashimoto H Karch R Laufs P Racz W Janssen 《Forensic science international》1987,34(3):169-174
Sudden and unexpected death and violent death of persons with a high risk of acquiring HIV-infections, especially homosexual males and intravenous drug abusers, have to be investigated by forensic autopsies. Therefore every forensic pathologist has to be aware of this infection and should try to make the proper diagnosis. Three typical cases are described: (1) suicide by hanging, (2) homicide by cutting the throat and (3) intravenous heroin overdose. Merely retrospectively it could be cleared up that the deceased were homosexual but did not manifestly suffer from AIDS. The morphological findings in the lymph nodes and the postmortem serological findings are described in detail. 相似文献
832.
833.
834.
Kenneth K. Fukunaga Richard A. Pasewark Michael Hawkins Howard Gudeman 《Law and human behavior》1981,5(4):325-328
Examining 484 consecutive criminal cases in which the NGRI plea was made, it was found: (1) a high degree of interexaminer agreement existed on the issue of the defendant's mental state in a nonadversary examination procedure; and, (2) court verdicts were highly congruent with the opinions expressed by examiners on the issue of insanity. 相似文献
835.
Fatal intraoperative hemorrhage during spinal fusion surgery for osteogenesis imperfecta 总被引:1,自引:0,他引:1
K Sperry 《The American journal of forensic medicine and pathology》1989,10(1):54-59
Osteogenesis imperfecta (OI) is an uncommon inherited systemic disorder of the connective tissues characterized primarily by varying degrees of bony fragility. Consequently, individuals affected by this condition frequently suffer severe skeletal injuries from otherwise innocuous traumatic events. This syndrome has other associated abnormalities, including hydrocephalus and brain stem compression on the basis of cranial developmental defects (platybasia), cardiac and vascular problems, respiratory disease from spinal deformities, vascular fragility, a bleeding disorder caused by an apparent platelet function abnormality, and anesthesia-related hyperpyrexia. A case is presented here of a young girl with advanced OI in whom intraoperative death occurred as a consequence of inadvertent rib fractures, with subsequent uncontrollable hemorrhage. OI may also potentially be mistaken for child abuse by an inexperienced examiner. 相似文献
836.
A fatal case of oral ingestion of toluene 总被引:1,自引:0,他引:1
A 51-year-old male ingested orally a large quantity of toluene and died about 30 min later. The presence of toluene in body fluids and tissues was confirmed by gas chromatography and gas chromatography/mass spectrometry. Tissue distribution of toluene showed that the liver detected the highest content of toluene (433.5 micrograms/g), except for the stomach contents, followed by pancreas (88.2 micrograms/g), brain (85.3 micrograms/g), heart (62.6 micrograms/g), blood (27.6 micrograms/g), fat (12.2 micrograms/g) and finally cerebrospinal fluid (11.1 micrograms/g). 相似文献
837.
838.
K Nolan 《Journal of health politics, policy and law》1989,14(4):827-832
839.
Diquat can be extracted with 1-butanol from high pH solution in the presence of several moderate reductants. The red colored reduced compound of diquat in water turns to a purple compound in 1-butanol. The absorption of the purple compound is 0.105 at 383 nm and 0.119 at 520 nm in 1 microgram diquat/ml 1-butanol. The latter value is a little higher than that of the red compound at 495 nm in water. The purple compound is much more stable than the red compound in water. More than 80% of 10 ppm diquat added can be extracted from serum, blood, tissues, urine and some drinks. The extraction with 1-butanol is useful for concentration of diquat contained in large volume. The lower limit of detection is 0.1 microgram/ml 1-butanol. Paraquat is insoluble in 1-butanol under the same condition. Therefore, this method is applicable for the determination of diquat when paraquat is also contained in the solution. 相似文献
840.
A spectrophotometrical method for discrimination between sulfhemoglobin (SHb) and choleglobin was applied to analyses of the green pigments in epidermal blisters of decomposed cadavers. SHb appeared to be a predominant constituent of the pigments, although significant amounts of choleglobin, one third to one sixth of SHb, were also demonstrated. The present results indicate that the greenish discoloration of decomposed cadavers is due to formation of a mixture of SHb, choleglobin and possibly other denatured hemoglobin derivatives. 相似文献