全文获取类型
收费全文 | 9570篇 |
免费 | 212篇 |
专业分类
各国政治 | 477篇 |
工人农民 | 252篇 |
世界政治 | 605篇 |
外交国际关系 | 342篇 |
法律 | 6265篇 |
中国共产党 | 1篇 |
中国政治 | 40篇 |
政治理论 | 1691篇 |
综合类 | 109篇 |
出版年
2020年 | 92篇 |
2019年 | 103篇 |
2018年 | 143篇 |
2017年 | 162篇 |
2016年 | 189篇 |
2015年 | 132篇 |
2014年 | 163篇 |
2013年 | 929篇 |
2012年 | 253篇 |
2011年 | 255篇 |
2010年 | 188篇 |
2009年 | 195篇 |
2008年 | 241篇 |
2007年 | 234篇 |
2006年 | 249篇 |
2005年 | 212篇 |
2004年 | 212篇 |
2003年 | 212篇 |
2002年 | 218篇 |
2001年 | 443篇 |
2000年 | 387篇 |
1999年 | 282篇 |
1998年 | 104篇 |
1997年 | 120篇 |
1996年 | 95篇 |
1995年 | 97篇 |
1994年 | 112篇 |
1993年 | 100篇 |
1992年 | 211篇 |
1991年 | 234篇 |
1990年 | 212篇 |
1989年 | 244篇 |
1988年 | 219篇 |
1987年 | 206篇 |
1986年 | 230篇 |
1985年 | 183篇 |
1984年 | 153篇 |
1983年 | 167篇 |
1982年 | 93篇 |
1981年 | 99篇 |
1980年 | 72篇 |
1979年 | 137篇 |
1978年 | 81篇 |
1977年 | 87篇 |
1976年 | 75篇 |
1975年 | 96篇 |
1974年 | 108篇 |
1973年 | 102篇 |
1972年 | 91篇 |
1971年 | 80篇 |
排序方式: 共有9782条查询结果,搜索用时 31 毫秒
31.
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
32.
Misidentification syndromes have been studied from a variety of perspectives, including phenomenological, biological, and nosological approaches. More recently, misidentification syndromes have been studied from a psychiatric-legal perspective, especially with regards to the problem of dangerousness. Capgras syndrome and other syndromes of misidentification can lead to hostile mood and subsequent physical violence. Little attention has so far been devoted to children as the objects of the psychotic person's misidentification delusion(s). We provide a review of cases from the anglophonic literature that have children as the misidentified objects, add three new cases, and then discuss the relationship between misidentification and potential harm to these children. 相似文献
33.
34.
A gas chromatographic (GC) fingerprint method, based on the presence or absence of six congeners, was developed for illicit cocaine samples. The fingerprint utilizes the relative abundances of these congeners towards each other, disregarding cocaine as the main constituent, and can be expressed numerically or graphically in the form of pictograms for rapid visual comparison. The method can be applied directly to a solution of the sample in chloroform, without previous workup procedures. More than 70 unrelated samples were analyzed and a great variation was observed in the parameter composition. On the other hand, a remarkable similarity could be seen between related samples. The GC fingerprint method may be considered an important contribution for sample comparison, as is exemplified by a subdivision of the analyzed samples in different categories, based on the number and types of congeners found. 相似文献
35.
C Moore S Browne I Tebbett A Negrusz W Meyer L Jain 《Forensic science international》1992,56(2):177-181
A new solid-phase extraction procedure for the determination of cocaine and benzoylecgonine in amniotic fluid, using high flow co-polymeric sorbents is reported. The recoveries of cocaine and benzoylecgonine within the range 0.1-1 mg/l were 95.7% and 50.3%, respectively. The use of high-flow sorbents allowed the easy extraction of amniotic fluid regardless of sample viscosity or physical nature. The use of these solid-phase columns provided many advantages over the more commonly used solvent extraction, including an increase in extraction speed and efficiency, reduced operator time, reduced solvent use and disposal volumes and exceptional extract quality. Further, the determination of amniotic fluid obtained from pregnant cocaine users may provide important information about handling of cocaine by the fetus at various gestational ages. The procedure was successfully applied to amniotic fluid from suspected cocaine abusers. 相似文献
36.
An improved method has been developed for the reliable classification of different C1R genetic variant forms from human serum or plasma. The method combines the use of neuraminidase-digested samples followed by monodimensional isoelectric focusing in the pH range 5 to 8 followed by immunoblotting. The method yields a simple pattern, with one major band in homozygote and two major bands in heterozygote cases. 相似文献
37.
38.
39.
A method ist described to determine the CO-content in the tissue of muscles. The prepared tissue is pulverized in a swinging mill at the temperature of liquid nitrogen. Parts of the powder are weighed into headspace vessels. Carbon monoxide ist ejected by a formerly described method and measured gaschromatographically. The Fe-content is determined after an acid disintegration by AAS. Acute intoxications lead to higher CO-contents in heart than in periphere muscles. Chronic exposure to carbon monoxide does not produce these differences. 相似文献
40.