全文获取类型
收费全文 | 1375篇 |
免费 | 61篇 |
国内免费 | 3篇 |
专业分类
各国政治 | 74篇 |
工人农民 | 45篇 |
世界政治 | 94篇 |
外交国际关系 | 80篇 |
法律 | 554篇 |
中国共产党 | 64篇 |
中国政治 | 125篇 |
政治理论 | 169篇 |
综合类 | 234篇 |
出版年
2024年 | 1篇 |
2023年 | 13篇 |
2022年 | 7篇 |
2021年 | 22篇 |
2020年 | 39篇 |
2019年 | 33篇 |
2018年 | 21篇 |
2017年 | 40篇 |
2016年 | 41篇 |
2015年 | 42篇 |
2014年 | 60篇 |
2013年 | 162篇 |
2012年 | 77篇 |
2011年 | 71篇 |
2010年 | 89篇 |
2009年 | 83篇 |
2008年 | 81篇 |
2007年 | 106篇 |
2006年 | 115篇 |
2005年 | 83篇 |
2004年 | 40篇 |
2003年 | 37篇 |
2002年 | 37篇 |
2001年 | 31篇 |
2000年 | 31篇 |
1999年 | 11篇 |
1998年 | 9篇 |
1997年 | 6篇 |
1996年 | 5篇 |
1995年 | 3篇 |
1994年 | 5篇 |
1993年 | 3篇 |
1992年 | 3篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 4篇 |
1988年 | 3篇 |
1987年 | 2篇 |
1986年 | 1篇 |
1984年 | 3篇 |
1983年 | 3篇 |
1981年 | 2篇 |
1979年 | 1篇 |
1978年 | 2篇 |
1977年 | 1篇 |
1975年 | 3篇 |
1973年 | 2篇 |
1970年 | 2篇 |
1965年 | 1篇 |
排序方式: 共有1439条查询结果,搜索用时 15 毫秒
71.
世纪之交我国有组织犯罪的特点及趋势 总被引:2,自引:0,他引:2
任惠华 《铁道警官高等专科学校学报》2000,10(1):22-24
有组织犯罪被联合国大会宣称为"全球性瘟疫",我国刑事立法已予以确认.本文从侦查学角度精要论述了世纪之交的特定历史时期我国有组织犯罪在犯罪主体、犯罪时间、犯罪地点、犯罪对象、犯罪手段方法等诸方面的特点,并在此基础上对其发展趋势作了理性分析. 相似文献
72.
Metal and metalloid multi-elementary ICP-MS validation in whole blood, plasma, urine and hair. Reference values 总被引:5,自引:0,他引:5
Goullé JP Mahieu L Castermant J Neveu N Bonneau L Lainé G Bouige D Lacroix C 《Forensic science international》2005,153(1):39-44
Four multi-elementary metal and metalloid quantification methods using inductively coupled plasma mass spectrometry (ICP-MS) were developed and validated in human whole blood, plasma, urine and hair by means of a single preparation procedure for each sample. The ICP-MS measurements were performed using a Thermo Elemental X7CCT series and PlasmaLab software without a dynamic reaction cell. With this procedure 27-32 elements can be simultaneously quantified in biological matrices: Li, Be, B, Al, V, Cr, Mn, Co, Ni, Cu, Zn, Ga, Ge, As, Se, Rb, Sr, Mo, Pd, Ag, Cd, Sn, Sb, Te, Ba, W, Pt, Hg, Tl, Pb, Bi, U. Whole blood, plasma and urine samples (0.4 ml each) were diluted with purified water, acid, triton X100 and butanol. Rhodium was used as internal standard. The urine sample results were corrected for enzymatic creatinine determination. Twenty-five milligrams hair samples were acid mineralized after a decontamination procedure and diluted as previously described for biological fluids. To be validated, each element had to show linearity with a correlation coefficient higher than 0.99. The intra-assay and inter-assay inaccuracy, measured as the variation coefficient, were below 5 and 10% respectively. Global performance was assessed by a quality control program. Our laboratory is a registered participant of the Institut National de Santé Publique du Québec (Sainte-Foy, Canada) inter-laboratory comparison program for whole blood, urine, and beard hair of non-occupationally exposed individuals spiked with selected elements. In our study multi-element metal and metalloid analysis was assessed for 27 elements in whole blood, 27 elements in plasma, 30 elements in urine and 32 elements in hair, from 0 to 25, or 250 to 1000 ng/ml, depending on the element. Quantification limits ranged from 0.002 ng/ml (U) to 8.1 ng/ml (Al) for whole blood, from 0.002 ng/ml (U) to 7.7 ng/ml (Al) for plasma, from 0.001 ng/ml (U) to 2.2 ng/ml (Se) for urine, and from 0.2 pg/mg (Tl) to 0.5 ng/mg (B) for hair. Normal values were determined in whole blood (n=100), plasma (n=100), urine (n=100), and hair (n=45) of healthy volunteers, leading to approximately 10,000 analyses. All results are presented and discussed. Clinical toxicology and forensic toxicology applications are also reported. ICP-MS has made significant advances in the field of clinical biology, particularly in toxicological analysis. This is due to the use of extremely effective equipment that permits better clinical and forensic toxicological analysis of metal and metalloid status of each individual patient. 相似文献
73.
Salas A Prieto L Montesino M Albarrán C Arroyo E Paredes-Herrera MR Di Lonardo AM Doutremepuich C Fernández-Fernández I de la Vega AG Alves C López CM López-Soto M Lorente JA Picornell A Espinheira RM Hernández A Palacio AM Espinoza M Yunis JJ Pérez-Lezaun A Pestano JJ Carril JC Corach D Vide MC Alvarez-Iglesias V Pinheiro MF Whittle MR Brehm A Gómez J 《Forensic science international》2005,150(2-3):191-198
A qualitative and quantitative analytical method was developed and validated for the determination of 49 licit and illicit drugs in oral fluid. Small oral fluid samples, volume 1mL, were collected from volunteers using a modified Omni-Sal device and the analytes were extracted from an oral fluid/buffer mixture using a single Bond Elut Certify solid phase extraction cartridge. Liquid chromatography-tandem mass spectrometry (LC-MS-MS) and gas chromatography-repetitive full scan mass spectrometry (GC-MS) were used in parallel to analyze the extracts for the targeted drugs. Extracts were analyzed by GC-MS in their underivatized form and as their pentafluoropropionyl derivatives. Deuterated internal standards were used for quantification of drugs of abuse by LC-MS-MS to minimize matrix effects. Methadone-d(9) and tumoxetine were used as the internal standards for quantification of non-derivatized and derivatized analytes respectively by GC-MS. Linearity was demonstrated over the range 5-200 ng/mL and limits of detection were less than 4 ng/mL for each drug analyzed. The method demonstrated acceptable recoveries for most of the analytes and good intra- and inter-day precision. Acquisition of data by repetitive full scan GC-MS allows the addition of further analytes to the target menu. 相似文献
74.
L'Abbé EN 《Forensic science international》2005,151(2-3):201-206
In the spring of 2003, bush cutters discovered a large grain bag filled with human skeletal remains in a forest in South Africa. Differential taphonomic processes observed on the bones suggested that the individuals had not died at the same time or had decomposed under different circumstances. The remains were sorted using gross morphological techniques which included assessing the number of skeletal elements present, visual pair matching, articulation, process of elimination and taphonomy. Standard techniques were used to estimate age, sex, racial affinity and stature. A minimum number of individuals (MNI) of 10 was established, which included 7 adult males, 1 adult female and 2 juveniles. Trauma was observed on only one individual. Approximately, 80% of the skeletal remains were missing. These various skeletal elements may have been lost by accident, normal taphonomic processes or taken by scavengers. Possible origins for these skeletal remains include removal from a formal grave, found in the veldt or murdered. 相似文献
75.
76.
77.
Interpretation of postmortem change in cadavers in Spain 总被引:2,自引:0,他引:2
Estimating time since death is especially difficult in the examination of poorly preserved cadavers and depends on the experience of the examiner and comparison with previously documented cases showing similar characteristics. The present study reports on information obtained over the past ten years through the work of the Laboratorio de Antropología y Odontología Forense (LAF) of the Instituto Anatómico Forense de Madrid, Spain, in particular evaluating how the type of fracture influences postmortem change. From the original 225 forensic cases examined between 1992 and 2002 in the LAF, a sample of 29 cases were selected from various regions of the Spanish mainland. A data collection protocol was established to reflect factors which the existing specialized literature, documenting the relation existing in the sample analyzed between time since death and the extent of postmortem change, which in the environments examined are distributed into the following phases: Phase 1 (putrefaction): one week to one month on the surface and two months in water. Phase 2 (initial skeletonization): two months on the surface and five to six months in water. Phase 3 (advanced skeltonization): six months to 1.5 years on the surface and 2.5 years buried. Phase 4 (complete skeletonization): about one year on the surface and three years buried. This paper also provide useful information on the impact of carrion insect activity, location, climate, seasonality, and predator. 相似文献
78.
79.
80.
本文以王光美对一则有关八大史实的回忆作为立足点,重新探讨了八大前后毛泽东对我国社会主要矛盾的认识脉络,认为毛泽东自始就不同意八大政治决议关于我国社会主要矛盾的观点,但由于理论和历史条件的限制,他不可能在八大政治决议通过前重新把阶级斗争确立为我国社会的主要矛盾.八大结束后,随着国际、国内形势的发展,毛泽东逐步在理论上提出"政治和思想战线上的社会主义革命"和"修正主义比教条主义更有害"的观点,经过1957年整风反右的实践,最终在八届三中全会上公开改变了八大关于我国社会主要矛盾的论断.这标志着20世纪50年代中期毛泽东提出的"以苏为鉴",开始向斯大林的社会主义模式复归. 相似文献